Biological Classification Test

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Biological Classification Test - 40

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Question 1
1 / -0

Protein cover of virus is __________.

A
Capsid

B
Virion

C
Viroid

D
Bacterial wall

Solution

The protein capsid provides the second major criterion for the classification of viruses. The capsid surrounds the virus and is composed of a finite number of protein subunits known as capsomeres, which usually associate with, or are found close to, the virion nucleic acid.
So, the correct answer is 'Capsid'
Question 2
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Virus attacking blue-green algae is known as ______________.

A
Cyanophage

B
Coliphage

C
Bacteriophage

D
Zoophage
Solution
Cyanophages are viruses that infect blue-green algae or cyanobacteria. Example - LPP-1 that infects the blue-green alga Plectonema boryanum.
Thus, the correct answer is (A).
Question 3
1 / -0

Tobacco mosaic virus was crystallised for the first time by ____________.

A
Edward Jenner

B
Louis Pasteur

C
Andre Lwoff

D
W.N. Stanley
Solution
- Tobacco mosaic virus is a positive-sense single-stranded RNA virus that infects tobacco and other members of the family Solanaceae.
- Tobacco mosaic virus was the first virus to be crystallized. It was achieved by Wendell Meredith Stanley in 1935.
- TMV crystalization also showed that TMV remains active even after crystallization.
- For his work, he was awarded the Nobel Prize in Chemistry in 1946. So the correct answer is 'W.N. Stanley'.
So, the correct answer is (D).
Question 4
1 / -0

Genetic material of influenza virus is _______________.

A
Single helix DNA

B
Double helix DNA

C
Double strand RNA

D
Single strand RNA

Solution

An RNA virus is a virus that has RNA (ribonucleic acid) as its genetic material. This nucleic acid is usually single-stranded RNA (ssRNA), but may be double-stranded RNA (dsRNA). Notable human diseases caused by RNA viruses include Ebola hemorrhoragic fever, SARS, influenza, hepatitis C, West Nile fever, polio, and measles. In virus classification, influenza viruses are RNA viruses that make up three of the five genera of the family Orthomyxoviridae.
Thus, the correct answer is RNA.
Question 5
1 / -0

Virus envelope is known as ____________.

A
Virion

B
Nucleoprotein

C
Core

D
Capsid

Solution

The structure of a virus consists of a core of nucleic acid surrounded by a protein envelope which is called a capsid. In its infective form, the virus particle is called a virion.

The correct answer is D.
Question 6
1 / -0

Cryptogram of TMV is _______________.

A
R/1, 1/a, S/S, S/Af

B
R/2, 1/5, E/P, P/S

C
R/1, 2/5, E/E, S/O

D
R/1, 2/7, E/E, S/O

Solution

Cryptogram of virus is the descriptive code summarising the main properties of a virus. The viruses have been named by a system of nomenclature as designated by International Committee of Virus Nomenclature. It consists of 4 parts, first - RNA/single stranded, 2/5 mol. wt. of n/a in millions /% of n/a in infective particle, E/E elongated rod shaped/ends parallel, S/O seed plant/spread without vector.
So, the correct answer is 'R/1, 2/5, E/E, S/O'
Question 7
1 / -0

A polyhedral virus is ________.

A
TMV

B
Polio Virus

C
Adenovirus

D
Vaccinia Virus

Solution

A virus can be classified into icosahedral, enveloped and complex or helical based on the structure of a virus. Polyhedral viruses consist of nucleic acid surrounded by a polyhedral or many-sided shell or capsid and usually in the form of an icosahedron. Adenovirus is an example of a polyhedral virus. Adenoviruses are nonenveloped viruses with an icosahedral nucleocapsid which surrounds the double-stranded DNA genome.
So, the correct answer is 'Adenovirus'.
Question 8
1 / -0

Viral genome that has been integrated and incorporated with bacterial genome is called __________.

A
DNA

B
Prophage

C
RNA

D
Both 2 and 3

Solution

A prophage is a bacteriophage genome which is inserted and integrated into the circular bacterial DNA chromosome. This is a latent form of a phage in which the viral genes are present in the bacterium without causing disruption of the bacterial cell. Prophage occurs during lysogenic cycle. So the correct answer is 'prophage'.
Question 9
1 / -0

Which one of the following statements about viruses is correct ?

A
Viruses possess their own metabolic system

B
All viruses contain both RNA and DNA

C
Viruses are obligate parasites

D
Nucleic acid of viruses is known as capsid.

Solution

Viruses lack their own independent metabolic system. They don’t have a nucleus and other organelles to perform cellular functions. They are simply a core of nucleic acid which is surrounded by a protein coat called as a capsid. They are totally dependent on their host for vital cellular activities. Hence viruses are called as obligate parasites.

The correct answer is C.
Question 10
1 / -0

Severe Acute Respiratory syndrome(SARS) ______________________.

A
Is caused by a variant of Pneumococcus virus(coronavirus)

B
Is caused by a variant of the common cold virus (corona virus)

C
Is an acute form of asthma

D
Affects non-vegetarians much faster than the vegetarians

Solution

SARS i.e Severe Acute respiratory syndrome is caused by corona virus, which belongs to the family of viruses causing the common cold. SARS is the serious respiratory illness which can sometimes cause death. It is a contagious disease which spreads from person to person.

The correct answer is B.

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Biological Classification Test - 40

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Biological Classification Test - 40

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SHARING IS CARING

Question 1

Capsid

Virion

Viroid

Bacterial wall

Solution

Question 2

Cyanophage

Coliphage

Bacteriophage

Zoophage

Solution

Question 3

Edward Jenner

Louis Pasteur

Andre Lwoff

W.N. Stanley

Solution

Question 4

Single helix DNA

Double helix DNA

Double strand RNA

Single strand RNA

Solution

Question 5

Virion

Nucleoprotein

Core

Capsid

Solution

Question 6

R/1, 1/a, S/S, S/Af

R/2, 1/5, E/P, P/S

R/1, 2/5, E/E, S/O

R/1, 2/7, E/E, S/O

Solution

Question 7

TMV

Polio Virus

Adenovirus

Vaccinia Virus

Solution

Question 8

DNA

Prophage

RNA

Both 2 and 3

Solution

Question 9

Viruses possess their own metabolic system

All viruses contain both RNA and DNA

Viruses are obligate parasites

Nucleic acid of viruses is known as capsid.

Solution

Question 10

Is caused by a variant of Pneumococcus virus(coronavirus)

Is caused by a variant of the common cold virus (corona virus)

Is an acute form of asthma

Affects non-vegetarians much faster than the vegetarians

Solution

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