Biological Classification Test

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Biological Classification Test - 39

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Weekly Quiz Competition

Question 1
1 / -0

Nucleic acid is absent in ___________.

A
Virus

B
Viroid

C
Prion

D
Mycoplasma
Question 2
1 / -0

An ovule bent to come at right angles to funicleis

A
Anatropous

B
Orthotropous

C
Campylotropious

D
Hemitropous.
Question 3
1 / -0

Toxin is secreted during storage condition by

A
Fusarium

B
Colletotrichum

C
Penicillium

D
Aspergillus
Question 4
1 / -0

Which is not found in mushroom

A
Eukaryotic structure

B
Dikaryotic mycellium

C
Basidiospores

D
Ascospores
Question 5
1 / -0

T M V has a size of ________________.

A
$${50nm \times 10 nm}$$

B
$${100 nm\times 20 nm}$$

C
$${300\times 18 nm}$$

D
$${500 nm\times 24 nm}$$

Solution

Tobacco mosaic virus (TMV) is a single stranded RNA virus that infects a wide range of plants, especially tobacco and other members of the family Solanaceae. Tobacco mosaic virus has a rod like appearance. Its capsid is made from 2130 molecules of coat protein and one molecule of genomic single strand RNA which is 6400 bases long. Virions of TMV are ~300 nm in length and ~18 nm in diameter. So the correct answer is '300 × 18nm'.
Question 6
1 / -0

T-bacteriophages possess ___________.

A
Rounded shape

B
Tadpole shape

C
Irregular shape

D
Rhombiod shape

Solution

The T bacteriophage is tadpole shaped with a head and tail. It consists of the five important sub units such as the head, collar, neck, tail base plate and fibres. This viral particle is naked, icosahedral and tailed. A dsDNA molecule is tightly packed inside the head. The DNA is 1,000 times longer than the phage itself which greatly remained folded. This DNA codes for more than 75 genes. So, the correct answer is 'Tadpole shape'.
Question 7
1 / -0

Virus was discovered by _____________.

A
Stanley

B
Ivanowaski

C
Herelle

D
Beijennck

Solution

The virus was discovered by Dmitry Ivanowaski when he used a bacterial filter for filtration of sap from an infected tobacco plant and showed the presence of viruses in the filtered sap. Stanley was a journalist and explorer. Herelle was a French Canadian microbiologist. Beijerinck was a Dutch microbiologist.

The correct answer is B.
Question 8
1 / -0

Polio Virus has _________.

A
ss DNA

B
RNA

C
Both DNA and RNA

D
Coiled nucleolus

Solution

Poliovirus, the causative agent of polio is a member virus of Enterovirus C, in the family of Picornaviridae. Poliovirus is composed of an RNA genome and a protein capsid. The genome is a single-stranded positive-sense RNA genome that is about 7500 nucleotides long.
So, the correct answer is 'RNA'
Question 9
1 / -0

Enzyme needed for production of DNA from RNA template in certain viruses is

A
RNA polymerase

B
Reverse transcriptase

C
DNA helicase

D
DNA polymerase

Solution

Reverse transcriptase also called RNA-directed DNA polymerase, an enzyme encoded from the genetic material of retroviruses that catalyzes the transcription of retrovirus RNA (ribonucleic acid) into DNA (deoxyribonucleic acid). This catalyzed transcription is the reverse process of normal cellular transcription of DNA into RNA, hence the names reverse transcriptase and retrovirus.
So, the correct answer is 'Reverse transcriptase'
Question 10
1 / -0

A bacteriophage possesses an enzyme ________________.

A
Protease

B
Urease

C
Dehydrogenase

D
Lysozyme.

Solution

A bacteriophage is a type of virus that infects bacteria. Bacteriophage genomes encode for lysozymes enzyme which plays the role in the lytic cycle. This enzyme helps in the release of virions by lysis of the host cells by digesting the host cell wall. Lysozyme also plays the role during infection where it bore a whole in host cellwall so that the bacteriopage can inject its genome into the host cytoplasm. Protease, urease and dehydrogenase are absent in bacteriophage. So, the correct answer is 'Lysozyme'.

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Biological Classification Test - 39

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Biological Classification Test - 39

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SHARING IS CARING

Question 1

Virus

Viroid

Prion

Mycoplasma

Question 2

Anatropous

Orthotropous

Campylotropious

Hemitropous.

Question 3

Fusarium

Colletotrichum

Penicillium

Aspergillus

Question 4

Eukaryotic structure

Dikaryotic mycellium

Basidiospores

Ascospores

Question 5

$${50nm \times 10 nm}$$

$${100 nm\times 20 nm}$$

$${300\times 18 nm}$$

$${500 nm\times 24 nm}$$

Solution

Question 6

Rounded shape

Tadpole shape

Irregular shape

Rhombiod shape

Solution

Question 7

Stanley

Ivanowaski

Herelle

Beijennck

Solution

Question 8

ss DNA

RNA

Both DNA and RNA

Coiled nucleolus

Solution

Question 9

RNA polymerase

Reverse transcriptase

DNA helicase

DNA polymerase

Solution

Question 10

Protease

Urease

Dehydrogenase

Lysozyme.

Solution

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