The Variety of Life Mcqs

This Set of Multiple choice questions and answers focuses on study of The Variety of Life in biology. These questions are chosen from a collection of most authoritative and best reference books on Biology. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, MDCAT, Teaching jobs Tests and Medicine industry job interviews. One should practice our Mcqs to assimilate knowledge on The Variety of Life in Biology comprehensively.

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20.
Viruses are ______ smaller than bacteria

10 - 100 times

10 - 1000 times

100 - 1000 times

1000 - 10000 times

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21.
Which of the statement about viruses is incorrect :

We can not grow them in laboratories on artificial medias

They are obligate intracellular parasite.

They can synthesize their nucleic acid

They are resistant to most of antibiotic treatment

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22.
Protein subunits of capsid is called the capsomeres is a characteristic of each virus. Their number in Herpes virus is:

100

152

162

172

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23.
Protein coat the capsid of adenovirus is :

Surrounded by genome

Surrounding genome

Surrounding the envelope

Both B and C

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24.
The agent of controversial nature causing mad cow infection is:

Bacteria

Cowpox Virus

Adenovirus

Prion

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26.
An isolated virus is not considered living since it:

Separates in to two inner parts

Can not metabolize

Rapidly looses its Genome chemical inert

Is coated with an air tight shield

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28.
Attachment of the bacteriophage with the receptor site on the bacterial cell wall involves:

Strong covalent bond between virion and the receptor site.

Week chemical unior between them

Both A and B depending upon the phage

None of these

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29.
In life cycle of bacteriophage which step occur after attachment of prophage with the receptor site of the bacterial cell wall:

Absorption

Multiplication

Lysogeny

Penetration

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30.
Which of the following is incorrect for the lysogenic cycle in life cycle of bacteriophage:

Phage when gets incorporated with the bacterial chromosome is called prophage.

The bacterium continues to live and reproduce normally

Lysogenic bacteria may get infected by the related phage.

The cycle may convert into lytic type resulting from environmental exposure.

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