Objective NCERT at your FINGERTIPS: Biology

NCERT

Chapter 2 Biological Classification - all with Video Answers

Educators

Chapter Questions

02:24

Problem 1

The classification system proposed by Linnaeus was af
(a) two
(b) three
(c) four
(d) five

Aflah M

Numerade Educator

02:42

Which of the following characters served as the criteria for five kingdom system of classification as used by R.H. Whittaker?
(a) Cell structure and thallus organisation
(b) Mode of nutrition and reproduction
(c) Phylogenetic relationships
(d) All of these

Aflah M

Numerade Educator

01:50

Problem 3

In Whittaker's five kingdom system of classification, eukaryotes are distributed among
(a) two kingdoms
(b) three kingdoms
(c) four kingdoms
(d) all the five kingdoms.

Aflah M

Numerade Educator

01:35

Problem 4

Which one of the following is an incorrect statement regarding mycoplasma?
(a) They lack a cell wall.
(b) They are the smallest living cells.
(c) They cannot survive without oxygen.
(d) They are pathogenic in plants and animals.

Aflah M

Numerade Educator

02:03

Problem 5

Select the pair that consists of plant or animal bacterial diseases.
(a) Cholera and typhoid
(b) Citrus canker and crown gall
(c) Malaria and dengue
(d) Both (a) and (b)

Aflah M

Numerade Educator

01:35

Problem 6

Bacteria are grouped under four categories according to their shape. Study the given figures and select the correct option regarding this.
$\begin{array}{llll}\text { A } & \text { B } & \text { C } & \text { D }\end{array}$
(a) Cocci Bacilli Spirilla Vibrio
(b) Spirilla Bacilli Vibrio Cocd
(c) Bacilli Spirilla Vibrio Cocci
(d) Bacilli Spirilla Cocci Vibrio

Aflah M

Numerade Educator

01:45

Problem 7

Read the following statements regarding methanogens and select the correct option.
(i) They are included in the group Archaebacteria.
(ii) They are responsible for the production of biogas in gobar gas plants.
(iii) They live in hot sulphur springs.
(iv) They are strictly anaerobic.
(a) Statements (i) and (ii) are correct
(b) Statements (i), (ii) and (iv) are correct
(c) Statements (ii), (iii) and (iv) are correct
(d) All statements are correct.

Aflah M

Numerade Educator

02:10

Problem 8

Given figure is of filamentous blue green alga Nostoc. Identify the parts marked as $\mathrm{A}$ and $\mathrm{B}$ and select the correct option.
A
(a) Heterocyst Mucilaginous sheath
(b) Vegetative cell Mucilaginous sheath
(c) Trichomes cell wall
(d) Mucilaginous sheath Heterocyst

Aflah M

Numerade Educator

02:36

Problem 9

Which of the following statements is incorrect regarding the structure of a typical bacterial cell ?
(a) Cells possess naked circular DNA which is folded to form nucleoid.
(b) Cells are surrounded by a peptidoglycan cell wall and a mucilaginous sheath.
(c) Cells possess well developed membrane bound cell organelles.
(d) Ribosomes in these cells are 705 in nature.

Aflah M

Numerade Educator

01:31

Problem 10

___ is the most common method of reproduction in bacteria.
(a) Binary fission
(b) Endospore formation
(c) Conjugation
(d) Sexual reproduction

Aflah M

Numerade Educator

02:27

Problem 11

Cyanobacteria are classified under which of the following kingdoms?
(a) Monera
(b) Protista
(c) Algae
(d) Plantae

Aflah M

Numerade Educator

01:18

Problem 12

___ bacteria oxidise various inorgaric substances such as nitrates, nitrites and ammonia, and use the released energy for ATP production. They play an important role in recycling of nutrients $(N, P, F e, S$ etc. $) .$
(a) Photosynthetic autotrophic
(b) Chemosynthetic autotrophic
(c) Parasitic
(d) Saprophytic

Aflah M

Numerade Educator

03:19

Problem 13

Given figure represents the ultrastructure of a typical cyanobacterial cell. Identify the different parts and select the correct option for $A$ and $B$.
A $\quad$ B
(a) Naked DNA Thylakoid
(b) Thyakoid Naked DNA
(d) DNA + Histones Thylakoid
$\begin{array}{ll}\text { (d) DNA + Histones } & 805 \text { rbosomes }\end{array}$

Aflah M

Numerade Educator

02:53

Problem 14

Read the following statements and select the correct option. Statement 1 : Almost all bacteria possess lipoproteinaceous plasma membrane. Statement 2 : The plasma membrane of archaebacteria as well as eubacteria harv same type of Epids.
(a) Both steremerts 1 and 2 are correct and statement 2 is the correct explanation of statement $1 .$
(b) Both statements 1 and 2 are corred but statement 2 is not the carect explanation of statement 1 .
(c) Statement 1 is corred and statertent 2 is incorrect.
(d) Beth statemerts 1 and 2 are incorrect.

Aflah M

Numerade Educator

02:10

Problem 15

Mycoplasmas are dessfied under which of the following kingdoms?
(s) Monee
(o) Protista (c) Fungi
(c) Plantae

Aflah M

Numerade Educator

01:58

Problem 16

___ are important deconposers that cause decas and decomposition of dead bodies of plants and animals.
(2) Saprotrophic bacteria
(b) Saprotrophic fungi
(d) Pata lice Saracenia
(d) Both $(a)$ and (b)

Aflah M

Numerade Educator

02:50

Problem 17

Photosynthetic pigments of Cyanobacteria (blue gras algae) include
(a) chlorophyll a
(b) carotenes
(c) xanthophylls
(d) all of these.

Aflah M

Numerade Educator

01:19

Problem 18

Cyanobacteria are used in agricultural fields for orgy improvement because they cause
(a) $\mathrm{N}_{2}$ fixation
(b) algal blooms
(c) phatosynthesis
(d) all of these.

Aflah M

Numerade Educator

02:57

Problem 19

Select the correct statement regarding heterocysts.
(a) These are present in some filamentous cyanobacteria such as Nostoc and Anabaend.
(b) These cells are specialiged to perform N_{rioxation, }
(c) These cells contain encyme nitrogenase.
(d) All of these.

Aflah M

Numerade Educator

02:05

Problem 20

In 5 -kingdom classification system, the kingdom tha includes the blue-green algae, nitrogen-ficing bacterì and methanogenic archaebacteria, is
(a) Plantae
(b) Fungi
(c) Protista
(d) Monera.

Aflah M

Numerade Educator

02:02

Problem 21

Which of the following statements is incarrect?
(a) Pathogenic bacteria cause 90if of human diseases
(b) A large number of antibiotics are produced Actinomycetes (e.g. Streptomyces), which are a dé of Fungi.
(c) $N_{2}$-fixing bacteria pick up free $\mathrm{N}_{2}$ from soil atmospher and convert it into nitrogenous compounds.
(d) Archaebacteria differ from other bacteria in havia a different cell wall structure and this feature responsib'e for theif survival in extreme conditiors

Aflah M

Numerade Educator

01:04

Problem 22

The kingdom Protista forms a link with kingdom
(a) Plantae
(b) Fungi
(c) Animalia
(d) all of these.

Aflah M

Numerade Educator

01:55

Problem 23

Which of the following kingdoms has no well define boundaries?
(a) Memera
(o) Pronista
(c) Fungi
(d) Wetaphyta and Metazoa

Aflah M

Numerade Educator

01:22

Problem 24

Members of kingdom Protista are primarily
(a) parasites
(b) terrestrial
(c) aquatic
(d) photosynthetic

Aflah M

Numerade Educator

01:28

Problem 25

Which of the following organisms have been placed ur kingdom Protista ?
(a) Chrysophytes and dinoflagellates
(b) Euglenoids
(c) Sime moulds and protozoans
(d) All of these

Aflah M

Numerade Educator

01:42

Problem 26

Which of the following groups of organisms are included under chrysophytes?
(a) Diatoms and desmids (golden algae)
(b) Diatoms and dinaflagellates
[c) Euglenoids
(d) Slime moulds

Aflah M

Numerade Educator

01:23

Problem 27

The cell wall is composed of two thin averlapping shells which fit together like a soap case, in
(a) desmids
(b) diatoms
(c) dinoflagellates
(d) slime moulds.

Aflah M

Numerade Educator

02:16

Problem 28

Diatomaceaus earth is used for all except
(a) polishing
(b) filteraticn of oils and syrups
(c) making sound and fire proof rooms
(d) biogas productian.

Aflah M

Numerade Educator

01:43

Problem 29

Chrysophytes are
(a) planktons
(b) nektons
(c) benthic organisms
(d) rooted submerged.

Aflah M

Numerade Educator

03:35

Problem 30

Match Column-l with Column-II and select the correct option from the codes given below. Column-I Column-ll
A. Chief producers in oceans
(i) Euglenolds
B. Red tides
(ii) Diatoms
C. Mirotrophic nutrition
(iii) Slime moulds
D. Plasmedium
(iv) Dinoflagellates
(a) $A-(i i), B-(i v), C-(i), D-(a)$
(b) $A-(i i), B-(w), C$ fiit), D-[0)
(c) $\mathrm{A}-(\mathrm{ii}\rangle, \mathrm{B}-(\mathrm{a}), \mathrm{C}-\mathrm{i}), \mathrm{D}-\mathrm{iv})$
(d) $\mathrm{A}-(\mathrm{i}), \mathrm{B} \cdot(\mathrm{iv}\rangle, \mathrm{C}-\mathrm{(iii}), \mathrm{D}-\mathrm{lii})$

Aflah M

Numerade Educator

02:12

Problem 31

Siliceous frustules of diatems being indestructible, piled up at the bottom of ocean and formed a thick bed over billions of years. Such a thick bed is known as
(a) redsea
(b) diatomaceous earth
(c) pseudorocks
(d) red tides.

Aflah M

Numerade Educator

01:25

Problem 32

Dinoflagellates are mostly
(a) marine and saprophytic
(b) fresh water and photosynthetic
(c) marine and photosynthetic
(d) terrestrial and photosjnthetic.

Aflah M

Numerade Educator

02:02

Problem 33

Red tides in warm coastal water develop due to the abundance of
(a) dinoflagellates
(b) euglenoids
(c) diatoms and desmids
(d) slime moulds.

Aflah M

Numerade Educator

01:45

Problem 34

Which of the following statements about Euglana is correct?
(a) Euglena is a flagellate organism.
(b) Euglena when placed in continuous darkness, loses its photosynthetic activity and dies.
(c) The pigments of Euglena are quite different from those of green plants.
(d) Euglena is a marine protist. -

Aflah M

Numerade Educator

01:29

Problem 35

The given statements describe a group of organisms. RE
(i) Instead of a cell wall they have a protein rich pelicle making their body flexible.
(ii) They have 2 flagella, a short and a long one.
(iii) They show mixotrophic nutrition.
(iv) They are connecting link between- plants and animale. Which of the following group is referred here?
(a) Dinoflagellates
(b) Slime moulds
(c) Desmids and diatoms

Aflah M

Numerade Educator

05:20

Problem 36

Study the given figure showing structure of Euglina, and select the option that correctly identifies $A, B, C$ and $D$.
.
$\begin{array}{lll}\text { A } & \text { B } & \text { C } & \text { D }\end{array}$
(a) Cytostome Photoreceptor Paramylum Myonernes
(b) Contractile Pholoreceptor Paramylum Chloroplast vacuole bodies
(c) Cytostome Stigma - Paramylum Chloroplast
(d) Cytostome Stigma Myonemes Chloroplast

Aflah M

Numerade Educator

04:27

Problem 37

A slide under microscope shows following features:
(i) Unicellularity
(ii) Wel defined nucleus
(iii) Biflagellate-one flagellum bing longitudinally and the other transversely What would you identify it as?
(a) Protozoan
(b) Bacterium
(c) Euglenoid
(d) Dinoflagellate

Aflah M

Numerade Educator

01:33

Problem 38

Which group of organisms is represented by the given figure?
(a) Diatoms
(b) Dinollagellates
(c) Bacteria
(d) " Euglencids

Aflah M

Numerade Educator

01:23

Problem 39

The meltinucleate slimy mass of protoplasm which forms the body of slime moulds is called as
(a) plasmodium
(b) myxamoeba
(c) sporocytes
(d) periplasmodium.

Aflah M

Numerade Educator

02:43

Problem 40

Slime moulds are
(a) photosynthetic protists
(b) saprophytic protists
(c) both $(a)$ and $(b)$
(d) none of these.

Aflah M

Numerade Educator

01:45

Problem 41

Read the following statements regarding euglenoids and select the incorrect ones.
(0) These are mostly fresh water organisms found in stagnant water.
(ii) Their body is covered by a protein rich layer called pellicle which makes their body flexible.
(iii) They are photosynthetic in the presence of sunlight but become heterotrophs in the absence of sunlight.
(iv) They usually possess two flagella, one long and one short.
(v) Euglenoids are multicellular ciliate protists.
'a) $(\mathrm{i})$ and (v)
(b) (iv) and $(v)$
c) (iii) only
(d) (v) only

Aflah M

Numerade Educator

04:56

Problem 42

Causal organisms of sleeping sickness and kala-azar belong to which of the following groups of protozoan protists?
(a) Amoeboid protozoans
(b) Flagellated protozoans
(c) Ciliated protozoans
(d) Sporozoans

Aflah M

Numerade Educator

02:43

Problem 43

Read the following statements and select the correct option. Statement 1: Euglena can be considered as a plant due to the presence of chlorophyl. Statement $2:$ Euglena cannot be dassified on the basis of two kingdom system of classification.
(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.

Aflah M

Numerade Educator

01:03

Problem 44

Identify the given figure of a Protozoan protist and select the correct option.
(a) Entanceba histifyca
(b) Plasmodim wax
(c) $G^{\circ}$ irda inlestines
(d) Tigpanascma gambianse

Aflah M

Numerade Educator

02:38

Problem 45

The Sporozoa are all internal have an infective cyst stage in their life cycle. An exafrp of Sporozoa is the genus , which caus malaria.
(a) ciliates, Plesmodium
(b) flagellates, Plasmodium
(c) parasites, Plasmochun
(d) parasites. Trypanasama

Aflah M

Numerade Educator

01:49

Problem 46

Which out of the following is a ciliated protozoan?
(a) Plasmodum whax
(b) Amoeba proteus
(c) Paramoecum caudahm
(d) Leishmana donovari

Aflah M

Numerade Educator

01:16

Problem 47

Which out of the following is a mismatched pair of protoze group and its example ?
(a) Amoeboid protozoan - Enfamoeba histalytica
(b) Flagellated protozoan - Giarcla intestinalis
(c) Ciliated protoroan
- Paramoechum caudalur
(d) Sporaroan
- Leishmanis donovani

Aflah M

Numerade Educator

01:58

Problem 48

____ is a parasite of large intestine of hurti beings and causes the disease.
(a) Escherichia col, amoebic dysentery
(b) Enfamoeba histalytica, amoebic dysentery
(c) Plasmodium vivax, malaria
(d) Trypanosoma gambiense, sleeping sickness

Aflah M

Numerade Educator

01:52

Problem 49

Refer the given figure of Paramoecum caudatum and se! the option that correctly identifies $A, B, C$ and $D$.
$\begin{array}{llll}\mathrm{A} & \mathrm{B} & \mathrm{C} & \mathrm{D}\end{array}$
(a) Cell wall Cilia Contractile Cytostome vacuole
(b) Pellicle Cilia Contractile Cytostomt vacuole
(c) Pellicle Cilia Macronucleus Cytostomt
(d) Pellicle Irichocysts Macronucleus Cytophar)

Aflah M

Numerade Educator

02:34

Problem 50

Which of the following combination of characters is true for slime maulds?
(a) Parasitic, plasmodium without walls, spores dispersed by air currents
(b) Saprophytic, plasmodium with walls, spores dispersed by water
(c) Parasitic, plasmodium without walls, spores dispersed by water
(d) Saprophytic, plasmodium without walls, spores dispersed by air currents

Aflah M

Numerade Educator

02:17

Problem 51

Which of the following options incorrecth distinguishes the kingdoms Monera and Protista?
Monera $\quad$ Protista
(a) Includes unicellular $\quad$ Includes multicellular prokaryotes eukaryotes
(b) Membrane bound cell Membrane bound cell organelles are absent organelles are present
(c) Cell wall when Cell wall, if present, present, made up of contains cellulose peptidoglycans
(d) Flagella, when present, Flagella and cilia when comprise of protein presem, made up of flagellin protein tubulin

Aflah M

Numerade Educator

02:17

Problem 52

Select the correct option that correctly identifies the different genera $\{A, B, C$ and $D$ ) of kingdom Fungi shown in figure.
A. $B$ C $C$
(a) Mucor Saccharomyces Morchella Amanita
(b) Mucor Saccharomyces Penicilium Agaricus
(c) Rhizopus Saccharomyces Aspergilus Morchella
(d) Aspergilus Rhizopus Penicillum Aganicus

Aflah M

Numerade Educator

01:07

Problem 53

Which of the following statements regarding the class Phycomycetes is correct?
(a) These are found in aquatic habitats and on decaying wood in moist and damp places or as obligate parasites on plants.
(b) Mycelium in these fungi is aseptate and coenocytic.
(c) Asexual reproduction occurs by motile zoospores and by non-motile aplanospores.
(d) All of these.

Aflah M

Numerade Educator

01:01

Problem 54

Fungi show asexual reproduction by all of the following kinds of spores except
(a) conidia
(b) onspores
(c) sporangiospore
(d) zoospores.

Aflah M

Numerade Educator

01:22

Problem 55

Sexual reproduction in Fungi occurs by all of the following except
(a) oospores
(b) ascopores
(c) 2005 pores
(d) basidiospores.

Aflah M

Numerade Educator

03:34

Problem 56

Dikaryophase is a specific characteristic of
(a) all Fungi
(b) Phycortycetes and Ascomycetes
(c) Basidiomycetes and Deuteromycetes
(d) Ascomycetes and Basidiomycetes

Aflah M

Numerade Educator

04:19

Problem 57

Which of the following classes of Fungi are characterised by the presence of coenocytic, multinucleate and branched mycelium?
(a) Basidiomycetes
(b) Phycomycetes
(c) Ascomycetes
(d) Deuteromycetes

Aflah M

Numerade Educator

01:38

Problem 58

Match Column-l with Column-ll and select the correct option from the codes given below. Column-I Column-II
A. Phycomycetes
(i) Sac fungi
B. Ascortrycetes
(ii) Algal fungl
C. Basidiomycetes
(iii) Fungi imperfecti
D. Deuteromycetes
(iv) Club fungi
(a) A-(ii), B-(i), C-liv), D-(iii)
(b) $A$-(ii), B-(iv), $C-(i), D-(i i)$ 2
(c) $A-(i v\}, 8-(i), C-(i i), D-(i i i)$
(d) A-(iv), B-(iii), $\mathrm{C}-$ (ii), D-(i)

Aflah M

Numerade Educator

01:03

Problem 59

Eukaryotic, achlorophyllous and heterotrophic organisms are grouped under which of the following kingdoms?
(a) Monera
(b) Protista
(c) Fungi
(d) Plantae

Aflah M

Numerade Educator

02:55

Problem 60

Given is the representation of life cycle of members of classes Ascomycetes and Basidiomycetes. Select the correct option for processes $A, B$ and $C$.
$\begin{array}{ll}\mathrm{A} & \mathrm{B}\end{array} \quad \mathbf{C}$
(a) Karyogamy Plasmogamy Meiosis
(b) Plasmogartiy Karyogamy Meiosis
(c) Plasmogamy Meiosis Karyogamy
(d) Karyogamy Meiosis Plasmogamy

Aflah M

Numerade Educator

01:07

Problem 61

Coenocytic mycelium is
(a) uninucleate, septate
(b) multinucleate, septate
(c) multinucleate, aseptate
(d) both $(b)$ and $(c)$.

Aflah M

Numerade Educator

01:47

Problem 62

Which of the following statements is not correct regarding the class Ascomycetes?
(a) Conidia are the asexual spores produced endogenously on conidiophores.
(b) Ascospores are the sexual spores produced endogenously in asci.
(c) Aspergilus, Neurospora and Claviceps are Ascomycetes fungi.
(d) Mycelium is generally branched and septate in Ascomycetes.

Hast Aggarwal

Numerade Educator

04:03

Problem 63

Fungi lacking crosswalls in the mycelium belong to class
(a) Phycomycetes
(b) Ascomycetes
(c) Basidiomycetes
(d) Deuteromycetes.

Aflah M

Numerade Educator

01:24

Problem 64

Which one is an incorrectly matched paif?
(a) Phycomycetes
- Mucor, Albugo
(b) Ascomycetes
$=$ Penicillium, Aspergilus
(c) Basidiomycetes
- Puccinia, Agaricus
(d) Deuteromycetes
- Ustilago, Colietotrichum

Aflah M

Numerade Educator

01:22

Problem 65

Which of the following statements is correct regarding sexual reproduction in Basidiomycetes?
(a) Plasmogarny occurs by the fusion of two somatic cells of different strains.
(b) Karyogamy and meiosis occur in the basidium producing four basidiospores.
(c) Basidiospores are exogenously produced on the basidium.
(d) All of these.

Aflah M

Numerade Educator

03:52

Problem 66

Term used for the dosed ascocarp is
(a) apothecium
(b) amphithecium
(c) endothecium
(d) cleistothecium.

Aflah M

Numerade Educator

01:40

Problem 67

Fungi producing 8 spores in a sac belorg to the dass
$\begin{array}{ll}\text { (a) Phycomycetes } & \text { (b) Ascomycetes } \\ \text { (c) Besidiomycetes } & \text { (d) Deuteromycetes. }\end{array}$

Aflah M

Numerade Educator

01:46

Problem 68

In Penicillium, the azerual reproduction takes place by
(a) sucrpores
(b) aplanospoes
(c) eporargiospores
(d) coribiorpores.

Aflah M

Numerade Educator

01:17

Problem 69

The worder drug, pericillin is ertarted from which of the following species of Penciliun ?
(a) Penicilfum notatum
(b) P chrenogerum
(d) $\operatorname{voth}(3)$ and $(b)$
(d) Hone of these

Aflah M

Numerade Educator

01:54

Problem 70

Select the incorrect match.
(a) Morels and truffles- Phycomycetes
(b) Puff balls and toad stools - Basidiomycetes
(c) Early blight of potato Alfernaria solanj
(d) Late blight of potato
- Phytophthora inlestan

Aflah M

Numerade Educator

01:38

Problem 71

Which of the following Fungi is a parasite on mustard plat and causes the disease white rust of crucifers?
(a) Albugo candida $c<1.6 \sin ^{2}$
(b) Puccinia graminis tritici cerevisiae
(c) Saccharomyces
(d) Ustilago hordei

Aflah M

Numerade Educator

02:06

Problem 72

Which of the following statements is incorrect about $\mathrm{t}$ ) class Deuteromycetes?
(a) They reproduce only by asexual spores (conidia).
(b) Mycelium in these fungi is branched and septate,
(c) They have only parasitic forms.
(d) Examples of these fungi are Alternaria, Colletotrich and Trichoderma.

Aflah M

Numerade Educator

01:33

Problem 73

Match Column-I with Column-II and select the come option from the codes given below. Column-ll Column-I (i) Penicillium, Streptomya
A. Edible delicacies
B. Experimental genetics
(ii) Neurospora crassa
C. Source of antibioties
(iii) Puccinia, Usfilago
D. Rust and smut diseases (iv) Morels and truffles
(a) A-(iv), B-(ii), C-(iii), D-(i)
(b) A-(iii), $B$-(i), C-(ii), D-(iv)
(c) $A-(i v), B-(i i), C-(i), D-(i i)$
(d) $A-(i v), B-(i i), C-(i i), D-(i)$

Aflah M

Numerade Educator

02:19

Problem 74

Main component of the cell wall of Fungi is
(a) cellulose
(b) pectin
(c) chitin
(d) dextrin.

Aflah M

Numerade Educator

02:32

Problem 75

Angiosperms have dominated the land tlora prims because of their
(a) poner of adaptability in diverse habitat
(b) property of producing large number of seeds
(c) nature of self pollination
(d) dornestication bg man.

Aflah M

Numerade Educator

04:59

Problem 76

Diversitication in plant life appeared
(a) due to long periods of evolutionary changes
(b) due to abrupt frutations
(c) suddenly on earthi
(d) by seed diopersal.

Aflah M

Numerade Educator

03:06

Problem 77

Which of thee is a defining character of plants?
(a) autotrophic nature
(b) eskayotic cell strudture
(c) cellulosic cell wall
(d) aerobic rexpiration

Aflah M

Numerade Educator

02:11

Problem 78

Match Column-I with Column-II and select the correct option from the codes given below. Column-l Column-II
A. Monera
(i) Chamydomonas, Solanum
8. Protista
(ii) Bacilus, Oscillatoria
C. Fungi
(iii) Euglena, Trypanosoma
D. Plantae
(iv) Mucor, Penicililium
E. Animalia
(v) Felis, Panthera
(a) $A-(i i), B-(i), C-(i v), D-(i), E-(v)$
(b) A.(ii), B-(iii), $C$-(iv), D-(i), E-fv)
(c) $\mathrm{A}-(i i), B-(i i), C-(i), D \cdot(i v), E-(v)$
(d) $A$-(ii), $B-(v), C-(i), D-(i v), E-(i i i)$

Aflah M

Numerade Educator

02:30

Problem 79

Study the following table carefully and select the correct option for $1,2,3$ and 4 .
1
$\begin{array}{lll}2 & 3 & 4\end{array}$
(a) Prokaryotic Absent Absent Unicellular
(b) Prokaryotic Present Present Multicellular
(c) Eukaryotic Present Present Multicellular
(d) Eukaryotic Absent Absent Unicellular

Aflah M

Numerade Educator

02:12

Problem 80

Read the following statements and select the correct option. Statement 1: Viruses are inert crystalline structures outside a living cell. Statement 2: Viroids possess a distinct protein coat.
(a) Both statements 1 and 2 are correct and statement $\underline{2}$ 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.

Aflah M

Numerade Educator

02:30

Problem 81

Select the incorrect statement.
(a) Most plant viruses are RIHA viruses.
(b) Bacteriophages possess ds DIIA.
(c) Vifus having an arthropod as vector is called as arbovirus.
(d) Prions possess only nucleoid and no proteins.

Aflah M

Numerade Educator

01:56

Problem 82

Which of the following statements regarding viruses are correct?
(i) These are cellular, infectious, nucleoprotien particles
(ii) They can be grown in culture medium.
(iii) Genetic material is either DNA or RNA, but never both.
(iv) They can be crystallised.
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i), (ii), (iii) and (iv)

Aflah M

Numerade Educator

01:21

Problem 83

Select the mismatched pair.
(a) Edward Jenner - Small pox vaccination
(b) Diener= Prions
(c) Louis Pasteur Rabies vaccination
(d) $W$. Stanley$=$ First to crystallise viruses

Aflah M

Numerade Educator

03:17

Problem 84

Virion is
(a) nucleic acid of virus
(b) antiviral agent
(c) protein of virus
(d) completely assembled virus outside host.

Aflah M

Numerade Educator

03:19

Problem 85

Study the given figure of structure of TMV (Tobacco Mosaic Virus) and select the option that correctly identifies the labellings $\mathrm{A}$ and $\mathrm{B}$.
A $\quad$ B
(a) SSDNA Capsomeres.
(b) dsDNA Capsomeres
(c) SSRNA Capsomeres
(d) dsRNA $\quad$ Tail fibres

Aflah M

Numerade Educator

04:12

Problem 86

Which one of the following is an incorrect pair?
(a) Louis Pasteur
- Coined the term 'vaceine"
(b) Beijerinck
- Contagium vivum fluidum
(c) Hanowsky
- Discovered retroviruses
(d) Stanley
$=$ Crystallised TMV

Aflah M

Numerade Educator

02:12

Problem 87

Select the pair that consists of viral diseases.
(a) Mumps and small pox
(b) Herpes and influenza
(c) Pneumonia and syphilis
(d) Both (a) and (b)

Aflah M

Numerade Educator

01:25

Problem 88

Given is an electron microscopic structure of a $\mathrm{T}_{2}$ bacteriophage. Identify the unlabelled parts and select the cortect cplion for $P, Q, R, S$ and $T$.
$\begin{array}{llll}\mathbf{P} & \mathbf{Q} & \mathbf{R} & \mathbf{S} & \mathbf{T}\end{array}$
(al Hewd Collar Sheach Besal olate Tal fibre
(b) Head Colat Capsic Tail Tai libre Tai fore
(4) Head Colar Sheath Cacsomere Tai ficre

Aflah M

Numerade Educator

Problem 89

In plants mesac fornacion, eaf roling andoring yelowing of plant parts renn cearing darfing and surted growth. necoss eth. are the sypcors of
|a] bacterali dsenses
(b) mycoolas-al dseases
c.viral desease
(d) fugel dseases.

Check back soon!

04:06

Problem 90

cannot copy the question

Rehana Riaz

Numerade Educator

02:24

Problem 91

Read the gven statements about lichers and select the incortect ones
Q. They represent an exampie of tommensl'sm.
(ii) Algal partner obtains water and mineral salts fromy fungus and the fungal partner obtains food preparges by the alga.
(iii) These do not grow in polluted areas. (iv) The mycobiont is usually an Ascomycetes or $\mathrm{f}$ Basidiomycetes.
(v) The phycobiont is mostly a green alga of cyanobacterium.
(Ni) These constitute the pioneet community in case hudrosere.
(a) (i) and (ii)
(c)
(d) $(i),(v)$ and (vil)

Aflah M

Numerade Educator

01:45

Problem 92

Which of the foliowing is not a viral dsease ci plants?
(a) Ract rot of yugartane\}
(b) Tepacco mosaic diselse
(c) Leat curi of tomato
(d) Tristeta disease of cithes

Aflah M

Numerade Educator

Problem 93

Who cysta loed and isolyted viruses tor the tirst time?
(a) WM Starley
(b) KM. Smith
(c) D. Hanowski
id) $\mathrm{fC}$. Bawden

Check back soon!

02:19

Problem 94

Read the isliowing statements and select the cotion whe cortecty identites the incortect ones.
(1) Potato spinde tuber disease and Chrysanthenu stunt dsease are caused by vipics.
(ii) Revovinses have two coeies of ssaNa.
(iv) Interfersns which prevent vital multiplication ? ghcolipid particies.
(a) (1) and
(b) (d) and (N) $|c|=o n^{l} y$
(d) (v) only

Aflah M

Numerade Educator

01:26

Problem 95

Match Colum-i with Column-ll and select the corre oction tor the codes given below. Column-I Column-ll
A. Piantrins
(0) Kuru disease
B. Arimal virus
(-i) Potato spindle tuber
C Vroids
(iii) Polio
D. Prons
(iv) Tobacco mosaic
(a) $A-(v), B-(i), C+\sqrt{1}$
c) $A-(m), B-(v), C-(i), D-(i i)$
(d) A-(ii), B-(iii), C\{iv), D-(i)

Aflah M

Numerade Educator