Objective Biology for NEET

Problem 1

All organism starts its life with
(a) Single cell
(b) Many cells
(c) Few cells
(d) Few organs

Narayan Hari

Numerade Educator

01:37

The sequence of events by which a cell duplicates its genome, synthesize the other constituent of cells and eventually divides itself into two daughter cells is termed as
(a) Cytology
(b) Cell division
(c) Cell cycle
(d) Cell biology

Narayan Hari

Numerade Educator

01:17

Problem 3

Which of the following is correct about cell cycle?
(a) All events occur in coordinated manner.
(b) All events are under genetic control.
(c) DNA synthesis occurs only during one specific stage in the cell cycle.
(d) All of these

Narayan Hari

Numerade Educator

Problem 4

Cell growth (increase in cytoplasm) is a
(a) Continuous process
(b) Discontinuous process
(c) Irregular process
(d) Retrogressive process

Narayan Hari

Numerade Educator

Problem 5

Our cell can divide itself once approximately in
(a) 24 hours
(b) 24 minutes
(c) 24 seconds
(d) 24 days

Narayan Hari

Numerade Educator

Problem 6

Duration of a cell cycle in yeast is approximately
(a) 90 seconds
(b) 90 minutes
(c) 20 minutes
(d) 45 minutes

Narayan Hari

Numerade Educator

01:26

Problem 7

Identify A, B, C and D in the below diagram:
(a) $\mathrm{A}-\mathrm{G}_{1}, \mathrm{~B}-\mathrm{S}, \mathrm{C}-\mathrm{G}_{2}, \mathrm{D}-\mathrm{M}$ Phase
(b) $\mathrm{A}-\mathrm{G}_{2}, \mathrm{~B}-\mathrm{M}$ Phase, $\mathrm{C}-\mathrm{G}_{1}, \mathrm{D}-\mathrm{S}$
(c) $\mathrm{A}-\mathrm{S}, \mathrm{B}-\mathrm{G}_{2}, \mathrm{C}-\mathrm{G}_{1}, \mathrm{D}-\mathrm{M}$ Phase
(d) A-M Phase, $\mathrm{B}-\mathrm{G}_{1}, \mathrm{C}-\mathrm{G}_{1}, \mathrm{D}-\mathrm{S}$

Parvati Devi

Numerade Educator

Problem 8

M-phase in human cell lasts for
(a) 1 hour
(b) 2 hours
(c) 23 hours
(d) 4 hours

Narayan Hari

Numerade Educator

01:25

Problem 9

Which of the following is correct about Interphase?
(a) It is the phase present between two successive M-phase.
(b) It lasts for more than 95 per cent in the duration of cell cycle in human cell.
(c) It is also known as resting phase.
(d) All the above

Narayan Hari

Numerade Educator

01:13

Problem 10

Select the correct matching:
Column I Column II
A. $\mathrm{G}_{1}$ Phase
-
1. Gap 1 Phase
B. Cytokinesis
2. Nuclear division
C. Karyokinesis
3. Cytoplasmic division
D. S phase
4. Synthesis phase
(a) $\mathrm{B}-1, \mathrm{C}-2, \mathrm{~A}-3, \mathrm{D}-4$
(b) A-1, C-2, B-3, D - -
(c) $\mathrm{D}-1, \mathrm{C}-2, \mathrm{~B}-3, \mathrm{~A}-4$
(d) $\mathrm{A}-1, \mathrm{D}-2, \mathrm{~B}-3, \mathrm{C}-4$

Parvati Devi

Numerade Educator

Problem 11

$\mathrm{G}_{1}$ phase is not characterized by
(a) Continuous growth
(b) Active metabolism
(c) DNA replication
(d) Non-replication of DNA

Narayan Hari

Numerade Educator

Problem 12

S-phase is not characterized by
(a) DNA duplication
(b) No increase in chromosome number
(c) DNA replication
(d) Duplication of centriole in nucleus of eukaryotic animal cell

Vishnu P

Numerade Educator

Problem 13

What occurs continuously when cell is divided into $\mathrm{G}_{1}, \mathrm{~S}$ and $\mathrm{G}_{2}$ phase?
(a) DNA Replication
(b) DNA Duplication
(c) Centriole duplication
(d) Growth of cell

Narayan Hari

Numerade Educator

00:33

Problem 14

If a cell has $2 n$ number of chromosome in $\mathrm{G}_{1}$ phase, what is the number of chromosome in cell after S-phase?
(a) $n$
(b) $4 n$
(c) $2 n$
(d) $8 n$

Vishnu P

Numerade Educator

Problem 15

Identify A, B and C in the below diagram.
(a) A-Interphase, B-Telophase, C-Anaphase
(b) A-Anaphase, B-Telophase, C-Interphase
(c) A-Telophase, B-Interphase, C-Anaphase
(d) A-Interphase, B-Anaphase, C-Telophase

Narayan Hari

Numerade Educator

Problem 16

The cells which do not divide enter $\quad$ phase from $\mathrm{G}_{1}$ phase.
(a) S-phase
(b) Directly $\mathrm{G}_{2}$ -phase
(c) $\mathrm{G}_{0}$ -phase
(d) Any one of these

Narayan Hari

Numerade Educator

Problem 17

$\mathrm{G}_{0}$ phase is characterized by
(a) DNA duplication
(b) Active metabolism
(c) S-phase
(d) M-phase

Narayan Hari

Numerade Educator

Problem 18

Select the incorrect statement from the following:
(a) In animals, mitotic cell division is only seen in the diploid somatic cells.
(b) Plants can show mitotic division in both haploid and diploid cells.
(c) In an adult's heart, the cells does not divide.
(d) All organisms starts their life cycle from multiple cell.

Narayan Hari

Numerade Educator

00:45

Problem 19

Mitosis is further divided in stages of cytoplasmic division?
(a) 1
(b) 2
(c) 3
(d) None of these

Vishnu P

Numerade Educator

01:18

Problem 20

Prophase is characterized by
(a) Initiation of condensation of chromosomal material.
(b) Centrioles moving towards opposite pole.
(c) Initiation of the assembly of mitotic spindle.
(d) All of these

Vishnu P

Numerade Educator

Problem 21

Cells at the end of prophase, when viewed under the microscope, do not show
(a) Golgi body and ER
(b) Nucleolus
(c) Nuclear envelop
(d) All of these

Narayan Hari

Numerade Educator

Problem 22

Which of the following initiates the start of metaphase?
(a) Completion of bivalent chromosome formation
(b) Assemblage of microtubules of nucleoplasm
(c) Complete disintegration of nuclear envelope
(d) Duplication of chromosome

Narayan Hari

Numerade Educator

Problem 23

Metaphase is not characterized by
(a) Complete condensation of chromosome
(b) Alignment of chromosome on metaphase plants
(c) Attachment of spindle fibre to kinetochore
(d) Splitting of chromosome

Narayan Hari

Numerade Educator

01:08

Problem 24

Indentify A, B, C and D in the below mitosis diagram.
C
(a) A-Transition to Metaphase, B-Metaphase, C-Early Prophase, D-Late Prophase
(b) A-Late Prophase, B-Transition to Metaphase, C-Metaphase, D-Early Prophase
(c) A-Early Prophase, B-Late Prophase, C-Transition to Metaphase, D-Metaphase
(d) A-Metaphase, B-Early Prophase, C-Late Prophase, D-Transition to Metaphase

Narayan Hari

Numerade Educator

Problem 25

Anaphase is characterized by
(a) Splitting of centromere
(b) Separation of chromatids
(c) Movement of chromatid to opposite pole
(d) All of these

Narayan Hari

Numerade Educator

01:44

Problem 26

Events of telophase are
(a) Chromosomes cluster at opposite spindle poles and their identity is lost as discrete elements.
(b) Nuclear envelope assembles around the chromosome cluster.
(c) Nucleolus, Golgi complex and ER reforms
(d) All the above

Vishnu P

Numerade Educator

00:47

Problem 27

Furrow formation does not occur in plant cell during cytokinesis because of
(a) Extensible cell wall
(b) Inextensible cell wall
(c) Extensible plasma membrane
(d) Inextensible plasma membrane

Vishnu P

Numerade Educator

01:23

Problem 28

Select the total number of correct statement:
I. Cell-plate formation occurs in plant cell during cytokinesis.
II. During cytokinesis mitochondria and plastid gets distributed between two daughter cells in mitosis.
III. Liquid endosperm in coconut is syncytium.
IV. Furrow formation occurs in Animal cell during cytokinesis
(a) 1
(b) 2
(c) 3
(d) 4

Parvati Devi

Numerade Educator

Problem 29

Cell which divides by mitosis is
(a) Upper layer of epidermis
(b) Cells lining gut
(c) Stem cells
(d) All of these

Narayan Hari

Numerade Educator

Problem 30

Plant shows continuous growth throughout their life because of
(a) Mitosis
(b) Amitosis
(c) Meiosis
(d) All of these

Narayan Hari

Numerade Educator

Problem 31

Mitosis helps
(a) Growth
(b) Repair
(c) Both (a) and (b)
(d) None of these

Narayan Hari

Numerade Educator

01:20

Problem 32

Which of the following holds true about meiosis?
I. It ensures the production of haploid phase in the life cycle of sexually reproducing organism where fertilization restores the diploid phase.
II. It involves the two sequential cycle of nuclear and cell division called meiosis I and II but only a single cycle of DNA replication.
III. It involves the pairing of homologous chromosomes and recombination between them.
IV. Four haploid cells are formed at the end of meiosis.
(a) I, II, IV only
(b) IV only
(c) I and III only
(d) All of these

Parvati Devi

Numerade Educator

Problem 33

Prophase I is divided into how many phases based on the chromosomal behaviour?
(a) 1
(b) 2
(c) 4
(d) 5

Narayan Hari

Numerade Educator

Problem 34

Synaptonemal complex formes in
(a) Zygotene
(b) Pachytene
(c) Diplotene
(d) Diakinesis

Vishnu P

Numerade Educator

00:58

Problem 35

Select the correct statement from the following:
(a) In leptotene stage the chromosomes become gradually visible under light microscope.
(b) During zygotene the heterologous chromosome shows pairing.
(c) Chiasmata is a J-shape structure formed in diplotene.
(d) Pachytene is characterized by the formation of synaptonemal complex.

Parvati Devi

Numerade Educator

Problem 36

Recombination is seen in
(a) Diplotene
(b) Zygotene or synaptotene
(c) Pachytene
(d) Diakinesis

Vishnu P

Numerade Educator

Problem 37

Synaptonemal complex is visible in
(a) Compound microscope
(b) Simple microscope
(c) Hand lens
(d) Electron microscope

Narayan Hari

Numerade Educator

01:15

Problem 38

Crossing over is an exchange of genetic material between
(a) Homologous chromosome
(b) Heterologus chromosome
(c) Non-homologous chromosome
(d) All of these

Vishnu P

Numerade Educator

01:26

Problem 39

The beginning of diplotene is characterized by
(a) Recombination
(b) Synapsis
(c) Dissolution of synaptonemal complex
(d) Formation of tetrad

Vishnu P

Numerade Educator

00:57

Problem 40

Diakinesis is characterized by
(a) Condensation of chromosome
(b) Assemblage of spindle
(c) Disappearance of nucleous and nuclear membrane
(d) All the above

Vishnu P

Numerade Educator

00:50

Problem 41

Homologous chromosomes gets separate during
(a) Metaphase-I
(b) Anaphase-I
(c) Anaphase-II
(d) Telophase-I

Vishnu P

Numerade Educator

00:50

Problem 42

The stage between two meiosis is
(a) M-phase
(b) Interphase
(c) S-phase
(d) Interkinesis

Vishnu P

Numerade Educator

Problem 43

Which of the following statement is incorrect?
(a) Prophase II is simpler than prophase I.
(b) Prophase I is longer and complex than prophase of mitosis.
(c) Nuclear membrane reappears in telophase I.
(d) Anaphase II is not characterized by the splitting of centromere.

Narayan Hari

Numerade Educator

00:43

Problem 44

Meiosis is significant because it
(a) Increases genetic variability
(b) Helps in the conservation of specific chromosome number
(c) Is important for evolution
(d) All of these

Vishnu P

Numerade Educator

00:48

Problem 45

Most of the cell organelle duplicates during
(a) $\mathrm{G}_{1}$ phase
(b) S-phase
(c) $\mathrm{G}_{2}$ phase
(d) M-phase

Vishnu P

Numerade Educator

Problem 46

Reduction of the division is
(a) Meiosis
(b) Mitosis
(c) Both (a) and (b)
(d) None of these

Narayan Hari

Numerade Educator

Problem 47

The main difference between dividing an animal and plant cell lies in
(a) Cell plate formation
(b) Chromosome movement
(c) Coiling of chromosome
(d) Chromosome division

Narayan Hari

Numerade Educator

Problem 48

Which of the following cells do not divide once it is differentiated?
(a) Interstitial cells
(b) Nerve cells
(c) Myeloid cells
(d) Glial cells

Narayan Hari

Numerade Educator

00:38

Problem 49

Mitosis occurs in
(a) Haploid cells only
(b) Diploid cells only
(c) Triploid cells only
(d) Both (a) and (b)

Vishnu P

Numerade Educator

Problem 50

Interphase is also called resting stage because
(a) Cell has stopped differentiation
(b) Cell is metabolically inactive
(c) No visible changes occur in the nucleus
(d) Cell does not grow

Narayan Hari

Numerade Educator

Problem 51

Diploid somatic cells is divided by
(a) Meiosis
(b) Mitosis only
(c) Both meiosis and mitosis.
(d) None of these

Narayan Hari

Numerade Educator

Problem 52

Cell division takes place when the cell
(a) Is haploid
(b) Becomes diploid
(c) Attains optimum growth
(d) Any time

Narayan Hari

Numerade Educator

Problem 53

Before cell division, the entire DNA content of the cell gets doubled during interphase.This doubling takes place
(a) Throughout the interphase
(b) At the beginning of the interphase
(c) At the end of the interphase
(d) Somewhere during the middle of the interphase

Narayan Hari

Numerade Educator

Problem 54

Cell cycle is divisible into
(a) karyokinesis and cytokinesis
(b) Interphase and prophase
(c) Interphase and mitotic phase
(d) M-phase and S-phase

Narayan Hari

Numerade Educator

Problem 55

The correct sequence of stages in cell cycle is
(a) $\mathrm{G}_{1}, \mathrm{~S}, \mathrm{G}_{2}, \mathrm{M}$
(b) $\mathrm{G}_{1}, \mathrm{G}_{2}, \mathrm{~S}, \mathrm{M}$
(c) $\mathrm{M}, \mathrm{S}, \mathrm{G}_{1}, \mathrm{G}_{2}$
(d) $\mathrm{G}_{2}, \mathrm{G}_{1}, \mathrm{M}, \mathrm{S}$

Narayan Hari

Numerade Educator

Problem 56

Condensation of chromosome with visible centromere occurs during
(a) $\mathrm{G}_{1}$ phase
(b) $\mathrm{G}_{2}$ phase
(c) S-phase
(d) M-phase

Narayan Hari

Numerade Educator

Problem 57

Synthesis of RNA and proteins takes place in
(a) M-phase
(b) S-phase
(c) $\mathrm{G}_{1}$ phase
(d) $\mathrm{G}_{1}$ and $\mathrm{G}_{2}$ phases

Narayan Hari

Numerade Educator

00:29

Problem 58

Mitosis is
(a) Karyokinesis
(b) Cytokinesis
(c) Reduction in chromosome number
(d) Both (a) and (b)

Vishnu P

Numerade Educator

Problem 59

As compared to meiosis, in mitosis
(a) Homologous chromosomes form pairs
(b) Daughters have half chromosome number
(c) Telophase stage is absent
(d) Prophase is shorter

Narayan Hari

Numerade Educator

00:29

Problem 60

The cellular structure which always disappears during mitosis or meiosis is
(a) Plastids
(b) Plasma membrane
(c) Nucleolus and nuclear envelope.
(d) None of these

Vishnu P

Numerade Educator

Problem 61

Chromosomes are arranged at equatorial plate of division spindle in
(a) Prophase
(b) Metaphase
(c) Anaphase
(d) Telophase

Narayan Hari

Numerade Educator

Problem 62

Chromosomes can be counted best at the stage of
(a) Prophase
(b) Anaphase
(c) Metaphase
(d) Telophase

Narayan Hari

Numerade Educator

Problem 63

The best stage to observe the shape, size and number of chromosomes is
(a) Interphase
(b) Metaphase
(c) Prophase
(d) Telophase

Narayan Hari

Numerade Educator

Problem 64

Spindle fibres are made up of
(a) Proteins
(b) Lipids
(c) Cellulose
(d) Pectin

Narayan Hari

Numerade Educator

Problem 65

Mitotic spindle is mainly composed of the protein
(a) Actin
(b) Actomyosin
(c) Tubulin
(d) Myoglobin

Narayan Hari

Numerade Educator

Problem 66

The separation of daughter chromosomes occurs in
(a) The beginning of anaphase
(b) Metaphase
(c) Late prophase
(d) Early prophase

Narayan Hari

Numerade Educator

Problem 67

At which stage of mitosis, the chromatids separate and start moving towards poles?
(a) Prophase
(b) Metaphase
(c) Anaphase
(d) Telophase

Narayan Hari

Numerade Educator

01:12

Problem 68

Mitotic anaphase differs from metaphase in possessing
(a) Same number of chromosomes and half number of chromatids.
(b) Half the number of chromosomes and same number of chromatids.
(c) Half the number of chromosomes and half number of chromatids.
(d) Same number of chromosomes and same number of chromatids.

Narayan Hari

Numerade Educator

00:57

Problem 69

Animal cells undergo cytokinesis by
(a) Furrowing
(b) Cell plate
(c) Both (a) and (b)
(d) Furrowing and followed by the deposition of special materials

Vishnu P

Numerade Educator

Problem 70

Significance of mitosis lies in
(a) Producing cells genetically similar to parent cell
(b) Occurrence in energy tissue of body
(c) Increasing cellular mass
(d) Swift division

Narayan Hari

Numerade Educator

01:05

Problem 71

Mitosis differs from meiosis in
(a) Forming four haploid cells.
(b) Pairing of homologous chromosomes and their subsequent separation.
(c) Doubling of each chromosome and each pair showing four chromatids.
(d) Duplication of chromosomes and subsequent separation of the duplicates.

Narayan Hari

Numerade Educator

00:21

Problem 72

The number of chromosomes present in pollen grains is six. What shall be their number in leaf cells?
(a) 12
(b) 24
(c) 6
(d) 3

Vishnu P

Numerade Educator

Problem 73

Meiosis occurs in
(a) Liver
(b) Kidney
(c) Gonad
(d) Brain

Narayan Hari

Numerade Educator

Problem 74

Meiosis is
(a) Disjunctional division
(b) Equational division
(c) Multiplicational division
(d) Reductional division

Narayan Hari

Numerade Educator

01:17

Problem 75

The following diagram shows modification of the meiosis I. Identify A, B, C, D.
(a) A-Telophase I, B-Anaphase I, C-Metaphase I, D-Prophase I
(b) A-Prophase I, B-Metaphase I, C-Anaphase I, D-Telophase I
(c) A-Metaphase I, B-Telophase I, C-Prophase I, D-Anaphase I
(d) A-Anaphase I, B-Prophase I, C-Telophase I, D-Metaphase I

Narayan Hari

Numerade Educator

Problem 76

Meiosis involves
(a) Two nuclear divisions and two chromosome divisions
(b) Two nuclear divisions and one chromosome division
(c) One nuclear division and one chromosome division
(d) One nuclear division and two chromosome divisions

Narayan Hari

Numerade Educator

Problem 77

Meiosis occurs in
(a) Haploid cells
(b) Diploid cells
(c) Both haploid and diploid cells
(d) Triploid cells

Narayan Hari

Numerade Educator

Problem 78

Which of the following statements is correct for meiosis?
(a) First division is equational and the second is reductional
(b) First division is reductional and the second is equational
(c) Both divisions are equational
(d) Both divisions are reductional

Narayan Hari

Numerade Educator

Problem 79

Meiosis can be studied in angiosperm in
(a) Root apical meristem
(b) Shoot apical meristem
(c) Dividing cells of vascular cambium
(d) Dividing pollen mother cells in anther

Narayan Hari

Numerade Educator

Problem 80

How many meiotic divisions are necessary to produce 600 pollen grains?
(a) 50
(b) 100
(c) 150
(d) 300

Vishnu P

Numerade Educator

Problem 81

Before undergoing meiosis, the amount of DNA of a cell
(a) Halves
(b) Doubles
(c) Remains the same
(d) Quadruples

Narayan Hari

Numerade Educator

00:56

Problem 82

Which of the following represents the correct order in Prophase I?
(a) Zygotene, diplotene, pachytene, leptotene, diakinesis
(b) Diakinesis, diplotene, leptotene, pachytene, zygotene
(c) Leptotene, zygotene, pachytene, diplotene, diakinesis
(d) Pachytene, leptotene, zygotene, diplotene, diakinesis

Parvati Devi

Numerade Educator

Problem 83

In which stage of meiosis, the chromosome is thin, long and thread-like?
(a) Leptotene
(b) Zygotene
(c) Pachytene
(d) Diakinesis

Vishnu P

Numerade Educator

Problem 84

Synaptonemal complex has a role in
(a) Chromosome pairing
(b) Chromosome movement
(c) Chromosome segregation
(d) Chromosome organization

Vishnu P

Numerade Educator

00:20

Problem 85

The synaptonemal complex is formed during
(a) Cytokinesis
(b) Amitosis
(c) Mitosis
(d) Meiosis

Vishnu P

Numerade Educator

Problem 86

Bivalents are formed during
(a) Diplotene
(b) Pachytene
(c) Zygotene
(d) Leptotene

Narayan Hari

Numerade Educator

Problem 87

Tetrad is made of
(a) Four non-homologous chromatids
(b) Four non-homologous chromosomes
(c) Four homologous chromosomes with four chromatids
(d) Two homologous chromosomes and each with two chromatids

Narayan Hari

Numerade Educator

Problem 88

The exchange of paternal and maternal chromosome material during cell division is
(a) Dyad formation
(b) Crossing over
(c) Synapsis
(d) Bivalent formation

Narayan Hari

Numerade Educator

Problem 89

Transfer of genes from one chromosome to another and vice versa during synapsis is called
(a) Crossing over
(b) Exchange
(c) Chiasmata
(d) Translocation

Narayan Hari

Numerade Educator

Problem 90

Repulsion of homologous chromosomes takes place in
(a) Diplotene
(b) Zygotene
(c) Diakinesis
(d) Leptotene

Narayan Hari

Numerade Educator

00:31

Problem 91

When are chromatids clearly visible in meiosis?
(a) Zygotene
(b) Pachytene
(c) Diplotene
(d) Diakinesis

Vishnu P

Numerade Educator

Problem 92

Chiasma formation occurs in
(a) Leptotene
(b) Zygotene
(c) Pachytene
(d) Diplotene

Narayan Hari

Numerade Educator

Problem 93

Cross-like configuration when non-sister chromatids of a bivalent comes in contact during the first meiotic division are
(a) Chiasmata
(b) Bivalents
(c) Chromomeres
(d) Centromeres

Vishnu P

Numerade Educator

01:18

Problem 94

Terminalization occurs during
(a) Mitosis
(b) Diakinesis
(c) Cytokinesis
(d) Meiosis II

Vishnu P

Numerade Educator

00:43

Problem 95

Number of chromosome groups at equatorial plate of metaphase I of a plant body having $2 n=50$ chromosomes shall be
(a) 100
(b) 75
(c) 50
(d) 25

Vishnu P

Numerade Educator

00:43

Problem 96

In meiosis I, the centromere undergoes
(a) No division
(b) Division between anaphase and interphase
(c) Division between prophase and metaphase
(d) Division but the daughter chromosomes do not separate

Vishnu P

Numerade Educator

Problem 97

Meiosis II performs
(a) Synthesis of DNA and centromere
(b) Separation of sex chromosomes
(c) Separation of chromatids
(d) Separation of homologous chromosomes

Narayan Hari

Numerade Educator

00:35

Problem 98

Significance of meiosis lies in the
(a) Reduction of chromosome number to one half.
(b) Maintaining the consistency of chromosome number during sexual reproduction.
(c) Production of genetic variability.
(d) All of these

Vishnu P

Numerade Educator

Problem 99

200 egg cells are produced by (in meiosis)
(a) 50 divisions
(b) 100 divisions
(c) 200 divisions
(d) 400 divisions

Narayan Hari

Numerade Educator

00:24

Problem 100

A cell has 23 pairs of chromosomes just after the completion of mitotic telophase. The number of chromatids at the preceding metaphase was
(a) 23
(b) 46
(c) 69
(d) 92

Vishnu P

Numerade Educator

00:31

Problem 101

In plant cells, cytokinesis occurs by
(a) Furrowing
(b) Invagination
(c) Anticlinal division
(d) Cell plate formation

Vishnu P

Numerade Educator

00:27

Problem 102

The phase of cell cycle during which 'DNA polymerase' is functionally active is
(a) $\mathrm{S}$
(b) $\mathrm{G}_{2}$
(c) $\mathrm{G}_{1}$
(d) $\mathrm{M}$

Vishnu P

Numerade Educator

00:47

Problem 103

The number of mitotic divisions required to produce 128 cells from a single cell is
(a) 7
(b) 14
(c) 8
(d) 36

Vishnu P

Numerade Educator

Problem 104

Which statement is correct for meiosis?
(a) Meiosis $\mathrm{I}$ is reduction division
(b) Meiosis II is reduction division
(c) Meiosis I and II are both reduction divisions
(d) Meiosis I and II both are not reduction divisions

Narayan Hari

Numerade Educator

01:10

Problem 105

Which of the following is the longest phase of meiosis?
(a) Prophase I
(b) Anaphase
(c) Prophase II
(d) Metaphase II

Narayan Hari

Numerade Educator

Problem 106

The following diagram shows modification of the meiosis II for storage. Identify A, B, C, D from the below figure.
(a) A-Prophase II, B-Metaphase II, C-Anaphase II, D-Telophase II
(b) A-Anaphase II, B-Prophase II, C-Telophase II, D-Metaphase II
(c) A-Metaphase II, B-Telophase II, C-Prophase II, D-Anaphase II
(d) A-Telophase II, B-Anaphase II, C-Metaphase II, D - Prophase II

Narayan Hari

Numerade Educator

01:04

Problem 107

$\mathrm{G}_{1}$ phase is
(a) End of mitosis and the start of S-phasc
(b) End of S-phase and the start of mitosis
(c) Start of S-phase and the start of mitosis
(d) End of S-phase and the end of mitosis

Narayan Hari

Numerade Educator

00:55

Problem 108

At which stage of mitosis the chromatids separate and pass to different poles?
(a) Prophase
(b) Metaphase
(c) Anaphase
(d) Telophase

Vishnu P

Numerade Educator

00:27

Problem 109

During meiosis, the crossover occurs between
(a) Sister chromatids of homologous chromosomes
(b) Non-sister chromatids of homologous chromosomes
(c) Sister chromatids of non-homologous chromosomes
(d) Non-homologous chromatids of homologous chromosomes

Vishnu P

Numerade Educator

Problem 110

Which of the following is not true for anaphase?
(a) Golgi body and ER are reformed
(b) Spindle poles move further apart
(c) Chromosomes move to opposite poles
(d) Centromeres split and chromatids separate

Narayan Hari

Numerade Educator

Problem 111

The longest phase of meiosis I is
(a) Metaphase I
(b) Prophase I
(c) Anaphase I
(d) Telophase I

Narayan Hari

Numerade Educator

01:06

Problem 112

Cyclin protein is required for cell cycle. Which other molecule is essential for the completion of cell cycle?
(a) CCK
(b) $\mathrm{CKC}$
(c) CDK
(d) CKD

Narayan Hari

Numerade Educator

Problem 113

Which is the correct statements from the following:
I. Synapsis of homologous chromosomes takes place during prophase I of meiosis.
II. Division of centromeres takes place during anaphase I of meiosis.
III. Spindle fibres disappear completely in telophase of mitosis.
IV. Nucleoli reappear at telophase I of meiosis.
(a) I only
(b) III only
(c) I and II only
(d) I, III and IV only

Parvati Devi

Numerade Educator

01:09

Problem 114

Assertion: The complex formed by a pair of synapsed homologous chromosome is called a bivalent or a tetrad. Reason: The first two stages of prophase I are relatively short lived when compared to the next stage that is pachytene.

Parvati Devi

Numerade Educator

01:09

Problem 115

Assertion: In oocytes of some vertcbrates, the diplotene can last for months or years. Reason: The final stage of meiotic prophase I is diakinesis.

Parvati Devi

Numerade Educator

00:58

Problem 116

Assertion: Variartions are are very important for the process of evolution. Reason: Most of the organelle duplication occur in $\mathrm{G}_{1}$ phase of cell cycle.

Parvati Devi

Numerade Educator

00:59

Problem 117

Assertion: Liquid endosperm in coconut is multinucleated. Reason: Karyokinesis is not followed by cytokinesis.

Parvati Devi

Numerade Educator

01:04

Problem 118

Assertion: Karyokinesis occurs in S-phase Reason: Cell division stops in M-phase

Parvati Devi

Numerade Educator

Problem 119

Assertion: Interphase is the resting stage. Reason: The interphase cell is metabolically inactive.

Parvati Devi

Numerade Educator

01:05

Problem 120

Assertion: DNA synthesis occurs in $\mathrm{G}_{1}$ and $\mathrm{G}_{2}$ periods of cell cycle. Reason: During $\mathrm{G}$, and $\mathrm{G}$, phase the DNA contents become double.

Parvati Devi

Numerade Educator

Problem 121

Assertion: Mitosis maintains the genetic similarity of somatic cells. Reason: Chromosomes do not undergo crossing over.

Vishnu P

Numerade Educator

Problem 122

Assertion: Chiasmata is formed during diplotene. Reason: Chiasmata are formed due to the deposition of nucleoproteins.

Vishnu P

Numerade Educator

00:57

Problem 123

Assertion: During zygotene, chromosomes show bivalent stage. Reason: Bivalent is half the number of chromosomes.

Parvati Devi

Numerade Educator

00:42

Problem 124

Assertion: Meiosis takes place in pollen mother cells. Reason: Each pollen mother cell produces 4 haploid pollen grains.

Parvati Devi

Numerade Educator

Problem 125

Assertion: Meiotic division results in the production of haploid cells. Reason: Synapsis occurs during zygotene of meiosis.

Parvati Devi

Numerade Educator

01:10

Problem 126

Assertion: Plant shows open growth. Reason: Plant contains meristmetic tissues.

Parvati Devi

Numerade Educator

00:41

Problem 127

Assertion: Prophase is characterised by formation of mitotic chromosome. Reason: Chromosomal material condenses in prophase stage.

Parvati Devi

Numerade Educator

00:59

Problem 128

Assertion: Morphology of chromosome is studied in metaphase stage. Reason: Condensation of chromosome is completed in this stage and can be easily visualised under microscope.

Parvati Devi

Numerade Educator

01:25

Problem 129

Assertion: Chromatid separation occurs in anaphase stage. Reason: Centromere splitting occurs in anaphase stage.

Parvati Devi

Numerade Educator

01:20

Problem 130

Assertion: In some social insect haploid cells divide by mitosis Reason: Growth of multicellular organism is due to mitosis

Parvati Devi

Numerade Educator

00:58

Problem 131

Assertion: Stage between two meiotic divisions (I \& II) is referred as interkinesis. Reason: Interkinesis is short lived phase.

Parvati Devi

Numerade Educator

00:53

Problem 132

Assertion: Meiotic division help in evolution process. Reason: Meiosis increases genetic variability in the population.

Parvati Devi

Numerade Educator

01:27

Problem 133

Assertion: The complex formed by a pair of synapsed homologous chromosome is called as tetrad. Reason: Each of the homologous chromosomes in meiotic prophase I consists a two closcly apposed sister chromatids.

Paras Aggarwal

Numerade Educator

Problem 134

Assertion: In oocytes, diplotene can last for months or years Reason: It is at this stage that chromosome decondense and engage in RNA synthesis

Parvati Devi

Numerade Educator

00:55

Problem 135

Assertion: Mitosis is called equational division. Reason: Mitosis is the division of parent cell into two identical daughter cells having the same amount of DNA as in parent cell.

Parvati Devi

Numerade Educator

01:11

Problem 136

Assertion: The interphase is considered as the most active stage of cell cycle. Reason: This phase is a period of intense synthesis and growth

Parvati Devi

Numerade Educator

01:22

Problem 137

Assertion: Disappearance of nuclear membrane is generally essential for karyokinesis. Reason: Forward movement of chromosomes is dependent on spindle apparatus, which organise is cytoplasm.

Parvati Devi

Numerade Educator

Problem 138

Assertion: Kinetochore is essential for cell division. Reason: Kinetochore serves as the sites of attachment of spindle fibres to the chromosome.

Parvati Devi

Numerade Educator

00:41

Problem 139

Assertion: Meiosis is also known as reduction division. Reason: Meiosis reduces the number of chromosome in daughter cells.

Parvati Devi

Numerade Educator

00:52

Problem 140

Assertion: Meiosis produces four genetically dissimilar cells. Reason: Crossing over or gene exchange takes place in meiosis.

Parvati Devi

Numerade Educator

Problem 141

Assertion: In mitotic metaphase, morphology of chromosomes can most easily study. Reason: Condensation of chromosomes is completed in this stage.

Paras Aggarwal

Numerade Educator