1. Viruses exhibit all the following except A. definite shape B. metabolism C.ge

Question

1. Viruses exhibit all the following except A. definite shape B. metabolism C.genes D. ability to infect host cells E. ultramicroscopic size 2 The core of every virus particle always contains A. DNA B. capsomeres C. enzymes D. DNA and RNA E. either DNA or RNA 3. Viral host range is limited by the A. type of nucleic acid in the virus. B. age of the host cell. C. type of host cell receptors on cell membrane. D. size of the host cell. 4. Mammalian viruses capable of starting tumors are A. chronic latent viruses B. oncoviruses C. syncytia D. inclusion bodies

Explanation / Answer

Que 1

Ans:

Viruses exhibit all of the following except: B. metabolism.

Explanation:

- Viruses are non living entities and as such do not inherently have their own metabolism.

- Viruses are intracellular obligate parasites.

Que 2

Ans:

The core of every virus particle always contains: E. either DNA or RNA.

EXplanation:

- Most viruses have either DNA or RNA as their genetic material.

- The nucleic acid may be single or double stranded.

Que 3.

Ans:

Viral host range is limited by the: C. type of host cell receptors on cell membrane.

Explanation:

- Some viruses have narrow host range while others have broad host range.

Que 4.

Ans:

Mammalian viruses capable of starting tumors are: B. oncoviruses.

Explanation:

- Oncovirus is a virus that cause cancer.

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