Biology - Mock Test 252

Question 2511

Which of the following is incorrect for the lysogenic cycle in life cycle of bacteriophage?

A) Phage when gets incorporated with the bacterial chromosome is called prophage. B) The bacterium continues to live and reproduce normally C) Lysogenic bacteria may get infected by the related phage. D) The cycle may convert into lytic type resulting from environmental exposure.

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Question 2512

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

A) Absorption B) Multiplication C) Lysogeny D) Penetration

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Question 2513

Attachment of the bacteriophage with the receptor site on the bacterial cell wall involves?

A) Strong covalent bond between virion and the receptor site. B) Week chemical unior between them C) Both A and B depending upon the phage D) None of these

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Question 2514

Bacteriopahage that infect E. coli are called?

A) M type B) N type C) T type D) S type

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Question 2515

An isolated virus is not considered living since it?

A) Separates in to two inner parts B) Can not metabolize C) Rapidly looses its Genome chemical inert D) Is coated with an air tight shield

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Question 2516

A virion is?

A) Virus B) Viral protein C) Viral lysozyme D) Viral gene

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Question 2517

The agent of controversial nature causing mad cow infection is?

A) Bacteria B) Cowpox Virus C) Adenovirus D) Prion

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Question 2518

Protein coat the capsid of adenovirus is?

A) Surrounded by genome B) Surrounding genome C) Surrounding the envelope D) Both B and C

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Question 2519

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

A) 100 B) 152 C) 162 D) 172

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Question 2520

Which of the statement about viruses is incorrect?

A) We can not grow them in laboratories on artificial medias B) They are obligate intracellular parasite. C) They can synthesize their nucleic acid D) They are resistant to most of antibiotic treatment

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