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4

The subunit of capsid is called

A. core

B. nucleotide

C. amino acid

D. capsomere

Correct Answer :

D. capsomere


The capsomere is a subunit of the capsid, an outer covering of protein that protects the genetic material of a virus. Capsomeres self-assemble to form the capsid.

Related Questions

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4

Refer the given figure of bacteria cell and Nostoc and choose the option which shows correct label for the structure marked as A, B, C, D and E ? 
img1

A. A – Cell wall, B – Cell membrane, C – Heterocyst, D – DNA, E – Mucilagenous sheath

B. A – Cell wall, B – Cell membrane, C – DNA, D – Heterocyst, E – Mucilagenous sheath

C. A – Mucilagenous sheath, B – Cell membrane, C – DNA, D – Heterocyst, E – Cell wall

D. A – Cell membrane, B – Cell wall, C – DNA, D – Heterocyst, E – Mucilagenous sheath

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4

The given characters are seen in which of the following group?
(i) Unicellular, colonial, filamentous, marine or terrestrial forms.
(ii) The colonies are surrounded by a gelatinous sheath.
(iii) Some can fix atmospheric nitrogen in specialized cells called heterocysts.
(iv) They often form blooms in water bodies.

A. Archaebacteria

B. Cyanobacteria

C. Chrysophytes

D. Dinoflagellates

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4

In some viruses, RNA is present instead of DNA indicating that

A. their nucleic acid must combine with host DNA before replication.

B. they cannot replicate.

C. there is no hereditary information.

D. RNA can transfer heredity material.

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4

Choose the correct statements (i v) regarding mycoplasma
(i) Mycoplasma has no cell wall.
(ii) Mycoplasma is the smallest living organism.
(iii) Mycoplasma cannot survive without O2.
(iv) Mycoplasma are pathogenic in animals and plants.
(v) A sort of sexual reproduction occurs in bacterium by adopting a primitive DNA transfer from one bacterium to the other.

A. Only (iii)

B. (i), (iii) and (v)

C. (i), (ii), (iv), and (v)

D. All of the above

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4

Why food can be kept for a longer time in cold house than in normal conditions ? Because,

A. insect cannot enter.

B. bacterial multiplication stops.

C. bacterial multiplication is reduced.

D. there is plasmolysis at low temperature.

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4

Match the terms given in column-I with their examples given in column-II and choose the correct option
Column-IColumn-II
(Terms)(Examples)
A. AscusI. Spirulina
B. BasidiumII. Penicillium
C. ProtistaIII. Agaricus
D. CyanobacteriaIV. Euglena
E. AnimaliaV. Sponges

A. A II, B III, C IV, D V, E I

B. A I, B II, C III, D V, E IV

C. A II, B V, C III, D I, E IV

D. A II, B III, C IV, D I, E V

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4

Match the type of protozoans given in column-I with their examples given in column-II and choose the correct option.
Column-IColumn-II
(Type of Protozoans)(Examples)
A. Amoeboid protozoansI. Paramecium
B. Ciliated protozoansII. Plasmodium
C. Flagellated protozoansIII. Amoeba
D. SporozoansIV. Trypanosoma

A. A I; B III; C IV; D II

B. A III; B I; C II; D IV

C. A III; B I; C IV; D II

D. A III; B IV; C I; D II

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4

Consider the following statements with respect to characteristic features of the kingdom.
(i) In animalia, the mode of nutrition is autotrophic.
(ii) In monera, the nuclear membrane is present.
(iii) In protista, the cell type is prokaryotic.
(iv) In plantae, the cell wall is present.
Of the above statements, which one is correct ?

A. (i) only

B. (ii) only

C. (iii) only

D. (iv) only

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4

Which of the following statement is incorrect ?

A. TMV has a double-stranded RNA molecule.

B. Most plant viruses are RNA viruses.

C. The bacteriophage has a double-stranded DNA molecule.

D. Most animal viruses are DNA viruses.

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4

Match column I (containing fungus name) with column II (common name) and choose the correct options.
Column-IColumn-II
(Fungus name)(Commonly called)
A. PucciniaI. Yeast
B. UstilagoII. Mushroom
C. AgaricusIII. Smut fungus
D. SaccharomycesIV. Rust fungus

A. A I, B II, C III, D IV

B. A II, B III, C IV, D I

C. A III, B IV, C I, D II

D. A IV, B III, C II, D I

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4

Which of the following group of kingdom protista is being described by the statements given below ?
(i) This group includes diatoms and golden algae.
(ii) They are microscopic and float passively in water currents (plankton).
(iii) Most of them are photosynthetic.
(iv) They have deposits in their habitat; this accumulation over billion of years is referred to as diatomaceous earth.

A. Dinoflagellates

B. Chrysophytes

C. Euglenoids

D. Slime moulds

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4

Which of the following is used extensively in biochemical and genetic work ?

A. Agaricus

B. Alternaria

C. Neurospora

D. Mucor

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4

When a moist bread is kept exposed in air, it becomes mouldy and black because

A. spores are present in the water.

B. spores are present in the bread.

C. spores are present in the air.

D. the bread decomposes.

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4

The given statements are some characters of a particular group of Kingdom protista.
(i) Most of them are fresh water organisms found in standing water.
(ii) They have a protein rich layer (called pellicle) which makes their body flexible.
(iii) They have two flagella, a short and a long one.
(iv) Though they are photosynthetic in the presence of sunlight, but in the absence of sunlight they behave like heterotrophs by predating on other smaller organisms.
Identify the correct group on the basis of these characters.

A. Protozoans

B. Chrysophytes

C. Slime moulds

D. Euglenoids

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4

Dikaryon formation is the characteristic feature of

A. ascomycetes and basidiomycetes.

B. phycomycetes and basidiomycetes.

C. ascomycetes and phycomycetes.

D. phycomycetes and zygomycetes.

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4

Which of the following processes involved in the reproduction of protists ?

A. Binary fission and budding

B. Cell fusion and zygote formation

C. Spore formation and cyst formation

D. All of the above

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4

Which of the following statement is correct for dinoflagellates flagella ?

A. A single flagellum lies in the transverse groove between the cell plates.

B. A single flagellum lies in the longitudinal groove between the cell plates.

C. Two flagella, one lies longitudinally and the other transversely in a furrow between the wall plates.

D. Flagella are absent.

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4

Which of the following statements regarding cyanobacteria is incorrect?

A. It is also called blue green algae.

B. They are chemosynthetic autotrophs.

C. It forms blooms in polluted water bodies.

D. It is unicellular, colonial or filamentous, marine or terrestrial bacteria.

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4

The symbiotic association of fungi and algae is called

A. lichen

B. mycorrhiza

C. rhizome

D. endomycorrhiza

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4

Which of the following is smallest living cell and can live without oxygen ?

A. Mycoplasma

B. Mycorrhiza

C. Euglena

D. Trypanosoma

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4

Fungi are filamentous with the exception of X which is unicellular. Identify X.

A. Yeast

B. Algae

C. Bacteria

D. Lichen

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4

Protista includes

A. unicellular eukaryotes with well-defined nucleus only.

B. unicellular prokaryotes with membrane bound organelles.

C. unicellular eukaryotes with well-defined nucleus and membrane bound organelles.

D. both unicellular and multicellular eukaryotes with welldefined nucleus and membrane bound organelles.

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4

A fungus contains cells with two nuclei from different genomes. The nuclei do not fuse but divide independently and simultaneously as new cells are formed. This fungus belongs to

A. phycomycetes

B. zygomycetes

C. deuteromycetes

D. basidiomycetes

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4

The given figure shows some labelled structure as A, B, C and D. In which structure the protein coat that encloses the nucleic acid is present? 
img6

A. A

B. B

C. C sheath

D. D tail fibres

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4

Clamp connection is found in

A. basidiomycetes

B. ascomycetes

C. saccharomycetes

D. haplomycetes

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4

Protozons are not included in kingdom animalia because they are

A. mostly asymmetrical.

B. unicellular eukaryotes.

C. heterotrophic in nature.

D. multicellular prokaryotes.

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4

Bacteria lack alternation of generation because there is

A. neither syngamy nor reduction division.

B. no distinct chromosomes.

C. no conjugation.

D. no exchange of genetic material.

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4

Which of the following statement is/ are correct for bacteria ?

A. They are the members of the kingdom monera.

B. They live in extreme habitats such as hot springs, deserts, snow and deep oceans.

C. They show the most extensive metabolic diversity.

D. All of the above

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4

Which of the following pigment is present in cyanobacteria?

A. Chlorophyll a

B. Chlorophyll b

C. Chlorophyll c

D. Chlorophyll d

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4

Match the class of fungi given in column I with their examples given in column II and choose the correct option
Column-IColumn-II
(Class of fungi)(Examples)
A. AscomycetesI. Rhizopus
B. BasidiomycetesII. Penicillium
C. DeuteromycetesIII. Ustilago
D. PhycomycetesIV. Alternaria

A. A IV, B III, C I, D II

B. A II, B III, C IV, D I

C. A IV, B I, C II, D III

D. A III, B IV, C II, D I