Objective NCERT at your FINGERTIPS: Biology

NCERT

Chapter 8

Cell: The Unit of Life - all with Video Answers

Educators

Chapter Questions

Problem 1

The most likely method, used to determine the ultrastructure of a cell organelle is
(a) autoradiography
(b) microdissection
(c) electron microscopy
(d) phase contrast microscopy.

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Problem 2

Unicellular microscopic organisms were first studied by
(a) Robert Hooke
(b) Priestley
(c) Pasteur
(d) Leeuwenhoek.

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Problem 3

The figures of cork cells as seen by Robert Hooke were published in the book
(a) Origin of species
(b) Species plantarum
(c) Genera plantarum
(d) Micrographia.

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Problem 4

Match Column-I with Column-II and select the correct option from the codes given below. Column-I $\quad$ Column-II
A. Leeuwenhoek
(i) First saw and described a living cell
B. Robert Brown
(ii) Presence of cell wall is unique to plant cells
C. Schleiden
(iii) Discovered the nucleus
D. Schwann
(iv) All plants are composed of different kind of cells
(a) $\quad A-(i), B-(i i i), C-(i v), D-(i i)$
(b) $\mathrm{A}-(\mathrm{i}), \mathrm{B}-(\mathrm{iii}), \mathrm{C}-(\mathrm{ii}), \mathrm{D}-(\mathrm{iv})$
(c) $\mathrm{A}$-(iii), B-(i), C-(iv), D-(ii)
(d) $\mathrm{A}-(\mathrm{i}), \mathrm{B}-(\mathrm{iv}), \mathrm{C}-(\mathrm{ii}), \mathrm{D}-(\mathrm{iii})$

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Problem 5

Cell theory was formulated by
(a) Schleiden and Schwann
(b) Robert Hooke
(c) Leeuwenhoek
(d) Marcello Malpighi.

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Problem 6

Omnis cellula e cellulae i.e., new cells arise from pre-existing cells; this statement was given by
(a) Schleiden and Schwann
(b) Rudolf Virchow
(c) Robert Brown
(d) Robert Hooke.

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Problem 7

______ are an exception to cell theory.
(a) Bacteria
(b) Fungi
(c) Viruses
(d) Lichens

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Problem 8

Who proposed a modification in the cell theory?
(a) Schleiden and Schwann
(b) Rudolf Virchow
(c) Robert Hooke
(d) Marcello Malpighi

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Problem 9

What is true about genetic material of a prokaryotic cell
(a) Lacks histones
(b) Not enveloped by nuclear membrane
(c) Composed of a single circular DNA molecule
(d) All of these

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Problem 10

Arrange the following steps in a correct sequence as. Gram's staining technique :
Treatment with $0.5 \%$ iodine solution (1), washing $n$ ? water (2), treatment with absolute alcohol/acetone ? staining with weak alkaline solution of crystal violet (4.)
(a) $4 \rightarrow 1 \rightarrow 2 \rightarrow 3$
(b) $3 \rightarrow 2 \rightarrow 1 \rightarrow 4$
(c) $3 \rightarrow 1 \rightarrow 2 \rightarrow 4$
(d) $4 \rightarrow 2 \rightarrow 3 \rightarrow 1$

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Problem 11

Which of the given statements are correct?
(i) Bacillus subtilis is a Gram (+) bacteria.
(ii) Escherichia coli is a Gram (-) bacteria.
(iii) Washing of the Gram's stain in Gram (-) bactent! due to high lipid content of the cell wall, which ç dissolved in organic solvents like acetone.
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (i), (ii) and (iii)

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Problem 12

Prokaryotic cells are generally than the eukaryotic cells.
(a) smaller, slower
(b) Iarger, slower
(c) smaller, faster
(d) larger, faster

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Problem 13

Mesosomes are the infoldings of cell membrane, which
(i) are present in both prokaryotic and eukaryotic cells .
(ii) help in cell wall formation, DNA replication and respiration
(iii) increase the surface area of plasma membrane.
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (d) (i), (ii) and (iii).

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Problem 14

Glycocalyx, (d) (i) and (iii) glycocalyx (mucm of a loose
thidk and tougir sele slime layer capsule, slime laycte (d) mesosome, slime layer
correct sequence

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Problem 15

Correct sequence of layers to inward is
(a) Cell wall $\rightarrow$ Glycocalyx $\rightarrow$ Cell membrane $\rightarrow$ Glycocalyx $\rightarrow$ Cell wall
(b)
(c) Glycocalyx $\rightarrow$ (ell wall tell membrane $\rightarrow$ Cell wall.
(d) Glycocalyx $-$ are self replicating, extra chromosomal segments

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Problem 16

are self replicating, extra chromosomal segments of double stranded circular and naked DNA, present in a becterial cell.
(a) Plasmids
(b) Nucleoid
(c) Mesosomes
(d) Bacteriophages

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Problem 17

Read the given statements and select the correct option. Statement $1:$ In prokaryotes mitochondria are absent. statement $2:$ In prokaryotes mesosomes are present which help in respiration.
(a) Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1 .
(b) Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1 .
(c) Statement 1 is correct and statement 2 is incorrect.
(d) Both statements 1 and 2 are incorrect.

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Problem 18

The type of ribosomes found in prokaryotes is
(a) $805 \mathrm{type}$
(b) 70 S type
(c) 30 s type
(d) 50 S type.

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Problem 19

You remove the fimbriae from the bacterial cell, which of the following would you expect to happen?
(a) The bacteria could no longer swim
(b) The bacteria would not adhere to the host tissue
(c) Transportation of molecules across the membrane would stop
(d) The shape of bacteria would change

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Problem 20

Plant cells differ from animal cells in having
(a) cell wall
(b) plastids
(c) a large.central vacuole
(d) all of these.

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Problem 21

Which one is the mis-matched pair?
(a) Largest isolated - Egg of an ostrich single cell
(b) Golgi apparatus - Discovered by Altman
(c) Mitochondria
$=$ Name was given by Benda
(d) Lysosomes
- Discovered by de Duve

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Problem 22

Read the given statements and select the correct option. Statement $1:$ The cisternae in Golgi complex have cis face and trans face. Statement $2:$ The cis face is also called forming face and trans face is also called maturing face.
(a) Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1 .
(b) Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1 .
(c) Statement 1 is correct and statement 2 is incorrect.
(d) Both statements 1 and 2 are incorrect.

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Problem 23

Polyribosomes are aggregation of
(a) ribosomes and rRNA
(b) peroxisomes
(c) several ribosomes held together by a string of $\mathrm{mRNA}$
(d) RNA.

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Problem 24

Select the wrono statement with respect to the structure of a plant cell.
(a) Cellulosic cell wall is present inside the cell membrane.
(b) Centrioles are usually absent.
(c) A large central vacuole is present.
(d) Golgi apparatus is formed of a number of unconnected units called dictyosomes.

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Problem 25

Which of these is not correct regarding ribosomes?
(a) Non-membrane bound $<$
(b) Present in the cytoplasm and on RER
(c) Absent in chloroplast and mitochondria
(d) Take part in protein synthesis

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Problem 26

Which organelle is not a part of the endomembrane system?
(a) ER
(b) Golgi complex
(c) Lysosomes
(d) Mitochondria

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Problem 27

Which of the following organelles is not included in endomembrane system?
(a) Golgi complex
(b) Peroxisomes
(c) Lysosomes
(d) Vacuoles

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Problem 28

According to unit membrane structure, the thickness of plasma membrane is about
(a) $35 \AA$
(b) $20 \AA$
(c) $75 \AA$
(d) $100 \AA$.

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Problem 29

Cell recognition and adhesion are facilitated by components of plasma membrane. These components are generally
(a) protein molecules alone
(b) lipids alone
(c) both lipids and proteins
(d) glycolipids and glycoproteins.

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Problem 30

The function of intracellular membrane is not to
(a) establish a number of compartments within the cell
(b) provide for the neat spatial organization of enzymes and pigments
(c) keep the cell rigidity so that it does not collapse
(d) provide a system of channel for the distribution of nutrients within the cell.

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Problem 31

Continuity of cytoplasm from cell to cell is maintained through oytoplasmic connections in plants called
(a) ER
(b) tight junction
(c) gap junction
(d) plasmodesmata.

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Problem 32

A phospholipid molecule is amphipathic and produces two layers coming in contact with $\mathrm{H}_{2} \mathrm{O}$. The head of phospholipid molecule is
(a) at an angle of $40^{\circ}$
(b) at the outer surface
(c) on the inner side
(d) embedded in protein molecules.

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Problem 33

Choose the incorrect statement regarding cell membrane.
(a) Generally smaller molecules pass easily and readily than large molecules.
(b) Water soluble substance pass through it less readily than lipid soluble substances.
(c) Membranes are selectiveiy permeable.
(d) None of these.

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Problem 34

Match Column-i with Column-Il and select the correct option from the codes given below. Column-I $\quad$ Column-II
A. Mitochondria
(i) Without membrane
B. Lysosomes
(ii) Single membrane
C Ribosomes
(iii) Double membrane
D. Nucleus
A
B $\quad$ C $\quad$ D
(a) (i)
(ii)
(iii) (iii)
(b) (iii)
(i)
(i)
(ii)
(c) (iii)
(ii)
(i)
(iii)
(d) (ii)
(iii)
(i)
(iii)

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Problem 35

Lysosomes are the process of packaging in the
(a) membrane bound, Golgi apparatus
(b) non-membrane bound, Golgi apparatus
(c) membrane bound, ER
(d) non-membrane bound, $\mathrm{ER}$

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Problem 36

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Problem 37

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Problem 38

Which of these is not a function of Golgi apparts?
(a) Site of synthesis of glycoproteins and glycol $p$ t
(b) Secretion
(c) Membrane transformation
(d) Site of protein synthesis

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Problem 39

Smooth endoplasmic reticulum is well developed inte:
which synthesize
(a) steroids
(b) proteins
(c) carbohydrates
(d) all of these.

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Problem 40

In which of the following part of mitochondria $\mathrm{se}$ dehydrogenase enzyme is located?
(a) Perimitochondrial space
(b) Outer membrane
(c) Matrix
(d) Inner membrane

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Problem 41

Which organelle helps in the synthesis of lipids, cholesterol, steroids and visual pigments in epithelial cells of retina?
(a) golgi bodies
(b) RER
(c) SER
(d) Mitochondria

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Problem 42

Mechanical support enzyme circulation/protein synthesis and detoxification of drugs are function of
(a) dictyosomes
(b) chloroplast
(c) ribosomes
(d) ER.

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Problem 43

Cell organelle extracted from endosperm of germinating castor beans are
(a) glyoxysomes
(b) peroxisomes
(c) mitochondria
(d) none of these.

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Problem 44

Given is the ultrastructure of an animal cell. Identify the parts marked as $A, B, C$ and $D$.
A B C D
(a) Plasma Nucleus Mitochondrion Golgi membrane complex
(b) Plasma Vacuole Mitochondrion Golgi membrane complex
(c) Cell wall Nucleus Mitochondrion RER
(d) Cell wall Vacuole Chloroplast Golgi complex

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Problem 45

Match Column-I with Column-II and select the correct Cotion from the codes given below.
Column-I $\quad$ Column-II
A. Nudeolus
(i) Lipid storage
B. Sphaerosomes
(ii) Glycolate metabolism
C Peroxisomes
(iii) Transport of macromolecules
D. Plasmodesmata
(iv) RNA synthesis $\begin{array}{llll}\text { A } & \text { B } C & \text { D }\end{array}$
(a) (iv)
(i)
(iii)
(ii)
(b) (i)
(ii)
(iv)
(iii)
(c) $(\mathrm{v})$
(i)
(ii)
(iii)
(d) (i)
(ii)
(iii)
(iv) 16 A th h

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Problem 46

As they release hydrolase that digest old and damaged cells, the term suicide bags is aptly used by cell biologists for
sulide ba
(a) Golgi bodies
(b) lysosomes
(c) glyoxysomes
(d) peroxisomes.

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Problem 47

Match the cell organelles given in Column-l with cellular processes in Column-II and select the correct option from the codes given below. Column-I $\quad$ Column-II
A. Lysosomes.
(i) Protein synthesis
B. Ribosomes
(ii) Hydrolytic activity
C. Smooth endoplasmic
(iii) Steroid synthesis reticulum
D. Centriole
(iv) Formation of spindle $\begin{array}{llll}\text { A } & \text { B } C & \text { D }\end{array}$
(a) (ii)
(i)
(iii) (iv)
(b) (i)
(iii)
(iv) (ii)
(c) (i)
(iv)
(iii) (ii)
(d) (iv)
(iii)
(i) $\quad$ (ii)

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Problem 48

Which is the best way to separate intact chloroplast from green leaves of anqiospermic plant?
(a) Petrol-ether
(b) Chloroform
(c) $10 \%$ sucrose solution
(d) Alcohol

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Problem 49

Select the incorrect pair.
(a) Cell wat $-$ Structural support
(b) Central vacuole
$-$ Storage
(c) Amyloplast
- Starch storage
(d) Plasmodesmata
- Protection

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Problem 50

Ribosomes are synthesized in
(a) nucleolus
(b) cytoplasm
(c) mitochondria
(d) Golgi complex.

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Problem 51

Match Column-I with Column-II and select the correct option from the codes given below. Column-I Column-II
A. RER
(i) Intracellular and extracellular digestion
B. SER
(ii) Lipid synthesis
C. Golgi complex
(iii) Protein synthesis and irithe go secretion
D. Lysosomes
(iv) Moves materials out of the cells
(a) $\mathrm{A}-(\mathrm{iii}), \mathrm{B}-(\mathrm{ii}), \mathrm{C}-(\mathrm{iv}), \mathrm{D}-(\mathrm{i})$
(b) A-(ii), B-(iii), C-(iv), D-(i) $=$
(c) $\mathrm{A}$-(i), B-(iii), C-(ii), D-(iv)
(d) A-(iv), B-(ii), C-(iii), D-(i)

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Problem 52

Is the single membrane bound organelle.
(a) Sphaerosome
(b) Lysosome
(c) Glyoxysome
(d) All of these

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Problem 53

Non-membrane bound cell organelle is
(a) ribosomes
(b) centrioles
(c) nucleolus
(d) all of these.

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Problem 54

Extranuclear inheritance is due to the presence of genes in
(a) mitochondria and chloroplasts
(b) nucleus and mitochondria
(c) nucleus and chloroplasts
(d) endoplasmic reticulum and mitochondria.

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Problem 55

Read the given statements and select the correct option. Statement $1:$ Chloroplast and mitochondria are semiautonomous bodies. Statement 2 : Chloroplast and mitochondria have their own DNA and protein synthesizing machinery.
(a) Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1 .
(b) Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1
(c) Statement 1 is correct and statement 2 is incorrect.
(d) Both statements 1 and 2 are incorrect.

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Problem 56

Lysosomes are the reservoirs (store houses) of
(a) hydrolytic enzymes
(b) oxidative enzymes
(c) secretory glycoproteins
(d) RNA and proteins.

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Problem 57

The cell organelle involved in the glycosylation of proteins is
(a) ribosome
(b) peroxisome
(c) mitochondrion
(d) endoplasmic reticulum.

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Problem 58

Bright colour of petals, is due to the presence of
(a) chloroplast
(b) anthocyanin
(c) chromoplast
(d) leucoplast.

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Problem 59

Cell organelle responsible for autolysis is
(a) dictyosome
(b) lysosome
(c) peroxisome
(d) glyoxysome.

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Problem 60

The function of glyoxysome is
(a) protein metabolism
(b) carbohydrate metabolism
(c) fat metabolism
(d) protein synthesis.

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Problem 61

Cells which are secretory in function have abundant
(a) lysosomes
(b) endoplasmic reticulum
(c) dictyosomes
(d) osteosomes.

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Problem 62

Who coined the term mitochondria?
(a) Altman
(b) Benda
(c) de Duve
(d) C. Golgi

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Problem 63

Select the option with correct labelling of given structure of Golgi apparatus.

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Problem 64

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Problem 65

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Problem 66

Read the given statements.
(i) Flat membranous sacs in stroma of chloroplass
(ii) Infoldings in mitochondria
(iii) Disc shaped sacs in Golgi apparatus Select the correct option as per the codes given abok Cristae $\quad$ Cisternae $\quad$ Thylakoids
(a) (iii)
(i)
(ii)
(b) $(i)$
(ii)
(iii)
(ii)
(iii)
(i)
(d) (iii)
(ii)
(i)

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Problem 67

Identify A and B in the given figure and select the o option.
A B
(a) Grana thylakoid Stroma thylakoid
(b) Stroma thylakoid Grana thylakoid
(c) Granum Stroma
(d) Stroma Granum

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Problem 68

are granular structures first observed under ?z microscope as dense particles by $(1955)$.
(a) Ribosomes, George Palade
(b) Ribosomes, Perner
(c) Lysosomes, de Duve
(d) Peroxisomes, de Duve

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Problem 69

Which of the is correct for the given structure?

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Problem 70

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Problem 71

Which of the following observations most strongly sappor that mitochondria contán electron transport
(a) Mitochondria have a highly folded inner wall.
(b) Disruption of mitochondria yields membrane fragments, which are able to synthesise ATP.
(c) A contractile protein capable of utilising ATP has been cbtained from mitochondria.
(d) Mitochondria in animal embryos have a tendency to concentrate in cells, which are to become locomotory
structures.

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Problem 72

The chcomoseme in which centromere lies slightly away from the middle of the chromosome resulting into one shorter arm and one longer arm, is called as 1
(a) metacentric
(b) submetacentric
$\begin{array}{ll}\text { (c) acrocentric } & \text { (d) telocentric. }\end{array}$ if

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Problem 73

Read the given statements.
(ii) Centromere is present in the middle of the chromosome and forms two equal arms.
(ii) Chromosome has a terminal centromere.
(ii) Centromere lies close to the end of the chromosome forming one extremely short and one very long arm.
(w) Centromere lies slightly away from the middle of the chromosome resulting into one shorter arm and one longer arm. Select the correct option as per the codes given above. Metacentric Submetacentric Acrocentric Telocentric
(a) (i)
(iv)
(iii)
(ii)
(b) (i)
(ii)
(iii)
(iv)
(c) (iv)
(i)
(iii)
(ii)
(d) (iv)
(ii)
(iii)
(i)

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Problem 74

Ribosomes are composed of
(a) RNA only
(b) Proteins only
(c) RNA and proteins
(d) RNA, proteins and DNA.

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Problem 75

Read the given statements and select the correct option. Statement $1:$ Peroxisomes are involved in photorespiration of the plant cells and help in the lipid metabolism of animal cells. Statement 2 : They are the cells' garbage disposal system.
(a) Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1 .
(b) Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1 .
(c) Statement 1 is correct and statement 2 is incorrect.
(d) Both statements 1 and 2 are incorrect.

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Problem 76

These are the denselystained reticular structures present near the nucleus, consisting of many flat, disc shaped cisternae of $0.5-1.0 \mu \mathrm{m}$ diameter. These are
(a) chloroplasts
(b) endoplasmic reticulum
(c) mitochondria
(d) Golgi apparatus.

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Problem 77

The best material for the study of structure of cell membrane is
(a) $\mathrm{RBC}$ of human
(b) liver cell
(c) kidney cell
(d) muscle cell.

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Problem 78

The most abundant lipid in the cell membrane is
(a) cutin
(b) glycolipid
(c) steroid
(d) phospholipid.

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Problem 79

Lipids are arranged within the membrane with
(a) polar heads toward inner side and the hydrophobic tails toward outerside Wherside
(c) heads toward outerside and tail towards inside
(d) both heads and tails toward innerside.

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Problem 80

Select the incorrect statement regarding the plasma membrane.
(a) Ratio of proteins and lipids varies considerably in different cell types.
(b) $52 \%$ proteins and $40 \%$ lipids constitute the membrane of human $\mathrm{RBC}$.
(c) Arrangement of proteins (P) and Lipids (L) is $L-P-P-L$ :
(d) Head of lipid is hydrophilic.

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Problem 81

The molecules in the membrane that limit its permeability are the
(a) carbohydrates
(b) phospholipids
(c) proteins
(d) water.

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Problem 82

The latest model of cell membrane is the
(a) Unit membrane model
(b) Fluid mosaic model
(c) Danielli and Davson's model
(d) Robertson's model.

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Problem 83

According to the modern concept, cell membrane is
(a) solid
(b) quasifluid
(c) fluid
(d) solidified sheath.

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Problem 84

The fluid mosaic model explains which aspects of a cell membrane?
(a) Only structural aspects
(b) Only functional aspects
(c) Both structural and functional aspects
(d) Only fluidity of membrane

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Problem 85

Integral cell membrane proteins
(a) are partially embedded in lipid layers
(b) are completely embedded in lipid layers
(c) show lateral but not vertical movements within bilayer of lipid
(d) all of these.

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Problem 86

Cell membrane is selective permeable. This means that it
(a) allows all materials to pass through
(b) allows only water to pass through
(c) allows only certain materials to pass through
(d) allows only ions to pass through.

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Problem 87

The movement of cilia and flagella is due to the presence of
(a) radial spokes
(b) central sheath
(c) singlet microtubules (d) dyneins.

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Problem 88

If you remove the cell wall from a plant cell and place it into a drop of water
(a) the cell would begin to grow
(b) the cell would shrink
(c) the cell would burst
(d) nothing would happen.

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Problem 89

A cell, which is very active in the synthesis and secretion of proteins, would be expected to have
(a) equal amount of RER and SER
(b) more SER than RER
(c) more RER than SER
(d) more Golgi bodies and no ER.

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Problem 90

Packing of substances for export from the cell occurs in the
(a) SER
(b) Golgi bodies
(c) lysosome
(d) nucleolus.

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Problem 91

Which of the following cell organelles are named after the name of its discoverer?
(a) ER
(b) DNA
(c) Golgi bodies
(d) Mitochondria

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Problem 92

Which of the following is correct for the origin of lysosome
(L)?
(a) $\mathrm{ER} \rightarrow$ Golgi bodies $\rightarrow \mathrm{L}$
(b) Golgi bodies $\rightarrow \mathrm{ER} \rightarrow \mathrm{L}$
(c) Nucleus $\rightarrow$ Golgi bodies $\rightarrow \mathrm{L}$
(d) Mitochondria $\rightarrow \mathrm{ER} \rightarrow$ Golgi bodies $\rightarrow \mathrm{L}$

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Problem 93

Read the given statements regarding a cell organ
(i) It contains water, sap, excretory products unwanted materials.
(ii) It is bóunded by a single membrane called
(iii) In plant cells, it can occupy upto $90 \%$ volume.
(iv) Its contents form cell sap.
(v) It maintains turgor pressure. The above features are attributed to
(a) lysosome
(b) vacuole
(c) peroxisome
(d) mitochondrion.

Qudsiya Anis

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Problem 94

Which of the following statements is incorrect?
(a) Mitochondria, unless specifically stained are nor. visible under the microscope.
(b) Physiological activity of cells determines the of mitochondria per cell.
(c) Mitochondrion, a power house of cell has om ribosomes and enzymes, so it can survive oust cell.
(d) Mitochondria divide by fission.

Qudsiya Anis

Numerade Educator

Problem 95

Which of the following represents the features of thoong
(a) A lower pH than the cytoplasm
(b) Reduced hydrolase activity
(c) Double membrane envelope
(d) All of these

Qudsiya Anis

Numerade Educator

Problem 96

Match Column-l with Column-II and select the option from the codes given below. Column-I $\quad$ Column-II
A. Chloroplasts
(i) Colourless plastíks
B. Chromoplasts
(ii) Yellow, orange or e. coloured plastids
C. Leucoplasts
(iii) Green plastids
(a) $\mathrm{A}-(\mathrm{iii}), \mathrm{B}-(i), \mathrm{C}-(\mathrm{ii})$
(b) $\mathrm{A}-(\mathrm{iii}), \mathrm{B}-(\mathrm{ii}), \mathrm{C} \cdot(1)$
(c) $\mathrm{A}-(\mathrm{i}), \mathrm{B}-($ iii), $\mathrm{C}-(\mathrm{ii})$
(d) $A-(i), B-(i i), C+(i i)$

Qudsiya Anis

Numerade Educator

Problem 97

Which of the following is the correct match?
(a) Amyloplasts - Store carbohydrates
(b) Elaioplasts - Store fats and oils
(c) Aleuroplasts - Store proteins
(d) All of these

Qudsiya Anis

Numerade Educator

Problem 98

Amyloplasts, elaioplasts and aleuroplasts bebs:
category of plastids.
(a) chloroplasts
(b) chromoplasts
(c) leucoplasts
(d) all of these

Qudsiya Anis

Numerade Educator

Problem 99

Which group of organelles is involved in syntto substances needed by cell?
(a) Lysosome, vacuole, ribosome
(b) Vacuole, RER, SER
(c) Ribosome, RER, SER
(d) RER, lysosome, vacuole

Qudsiya Anis

Numerade Educator

Problem 100

Dye injected into a cell might be able to enter an adjacent cell through
(a) nicrolubu
(b) microfilament
(c) plasmodesmata.
(d) tight junction.
(d) plasilioute

Qudsiya Anis

Numerade Educator

Problem 101

An Oracteristicwith an internal cross section showing organelle "g $+2^{\prime \prime}$ array is the
(b) microfilament microtubule
(c) cilium or flagellum

Qudsiya Anis

Numerade Educator

Problem 102

The core of a cilium or flagellum composed of microtubules
(V) and their assocolast
(b) axoneme
(a) biepliofilament
(d) tubulin.

Qudsiya Anis

Numerade Educator

Problem 103

Whicition of clia / flagella? peripherap Central Radial (Central microtubules microtubules spokes sheath (doublets) (singlets) 2
8
1
(a) $9+0,9+0 \quad 9+0 \quad 9$
$9+2$
(b) $9+2 \quad 2 \quad 9$

Qudsiya Anis

Numerade Educator

Problem 104

Ceftrioles arise from
(a) pre-existing centrioles
(b) de novo
(c) nuclear envelope
(d) sphaerosome.

Qudsiya Anis

Numerade Educator

Problem 105

Which of the following statements is incorrect for centrioles?
(a) Both the centrioles in a centrosome lie perpendicular to each other.
(b) Central proteinaceous hub is missing in a centriole.
(c) Each centriole has an organization like that of $a$ cartwheel.
(d) Centrosome usually contains 2 cylindrical centrioles.

Qudsiya Anis

Numerade Educator

Problem 106

Which of the following options is correct about structures
$$
\begin{array}{lcccc}
\hline \begin{array}{l}
\text { Peripheral } \\
\text { microtubules } \\
\text { (triplets) }
\end{array} & \begin{array}{c}
\text { Central } \\
\text { microtubules } \\
\text { (singlets) }
\end{array} & & & \begin{array}{c}
\text { \mathrm{\{} I n t e r ~ } \\
\text { triplet } \\
\text { bridge }
\end{array} \\
\text { (a) } 9 & 2 & 1 & 9 & 9 \\
\text { (b) } 9 & 2 & 9 & 9 & 9 \\
\text { (c) } 9 & 2 & 1 & 2 & 2 \\
\text { (o) } 9 & 0 & 1 & 9 & 9
\end{array}
$$

Qudsiya Anis

Numerade Educator

Problem 107

is directly connected to the outer nuclear membrane.
(a) Mitochondria
(b) Golgi body
(c) $E R$
(d) Chloroplast

Qudsiya Anis

Numerade Educator

Problem 108

How does a cell rid itself of defective or malfunctioning organelles?
(a) They are engulfed by plastids and stored until from cell is possible.
(b) Defective parts accumulate until the cell itself dies.
(c) They are exported by exocytosis.
(d) Lysosomes assist in the removal of defective organelles by digesting them.

Qudsiya Anis

Numerade Educator

Problem 109

Which of the following is correct regarding the given figure?
$\begin{array}{cccc} & \begin{array}{c}\text { No. of } \\ \text { centromere }\end{array} & \begin{array}{c}\text { No. of } \\ \text { kinetochore }\end{array} & \begin{array}{c}\text { No. of } \\ \text { arms }\end{array} \\ \text { (a) } & 2 & 1 & 4 \\ \text { (b) } & 1 & 2 & 4 \\ \text { (c) } & 2 & 2 & 4 \\ \text { (d) } & 1 & 2 & 2\end{array}$

Qudsiya Anis

Numerade Educator

Problem 110

ldentify the components labelled $A, B, C$ and $D$ in the given figure of cell membrane from the list (i) to (vii) given along
f with and select the correct option.
Components:
(i) Sugar
(ii) Protein
(iii) Lipid bilayer
(iv) Integral protein
(v) Cytoplasm
(vi) Cell wall
(vii) External protein The correct matching of components is
(a) $\mathrm{A}-(\mathrm{i}), \mathrm{B}-(\mathrm{ii}), \mathrm{C}-(\mathrm{iii}), \mathrm{D}-(\mathrm{iv})$
(b) $\mathrm{A}-(\mathrm{ii}), \mathrm{B}-(\mathrm{i}), \mathrm{C}-(\mathrm{iii}), \mathrm{D}-(\mathrm{iv})$
(c) $\mathrm{A}-(\mathrm{i}), \mathrm{B}-(\mathrm{ii}), \mathrm{C}-(\mathrm{iii}), \mathrm{D}-(\mathrm{vi})$
(d) $\mathrm{A}-(\mathrm{i}), \mathrm{B}-(\mathrm{ii}), \mathrm{C}-(\mathrm{iii}), \mathrm{D}-(\mathrm{vii})$

Qudsiya Anis

Numerade Educator

Problem 111

Which of the following statements regarding sphaerosomes is not correct?
(a) Abundant in the endosperm cells of oil seeds.
(b) Bounded by a single membrane
(c) Take part in synthesis and storage of lipids
(d) In plants they take part in photorespiration

Qudsiya Anis

Numerade Educator

Problem 112

The lipid molecules present in plasma membrane have polar heads and non-polar tails (as shown in figure). Which option represents the correct arrangement of lipids in lipid bilayer?

Qudsiya Anis

Numerade Educator

Problem 113

What does $A, B$ and $C$ represent in the given figure of a chromosome?
A $\quad$ B $\quad$ C
(a) Centriole Satellite Primary constriction
(b) Centriole Satellite Secondary constriction
(c) Centromere Satellite Secondary constriction
(d) Centromere Satellite Primary constriction

Qudsiya Anis

Numerade Educator

Problem 114

All plastids have essentially the same structure because
(a) they have to perform the same function
(b) they are localised in the aerial parts of plants
(c) one type of plastids can differentiate into requirements
(d) all plastids have to store starch, lipids and proteins.

Qudsiya Anis

Numerade Educator

Problem 115

Lucas Finney

Numerade Educator

Problem 116

Lucas Finney

Numerade Educator

Problem 117

Lucas Finney

Numerade Educator

Problem 118

In chloroplasts, chlorophyll is present in the
(a) outer membrane
(b) inner membrane
(c) thylakoids
(d) stroma.

Qudsiya Anis

Numerade Educator

Problem 119

Lucas Finney

Numerade Educator

Problem 120

Lucas Finney

Numerade Educator