ANSWER the following 1.) What are prions? Select one: a. viral DNA that attaches

Question

ANSWER the following

1.) What are prions?

Select one:

a. viral DNA that attaches itself to the host genome and causes disease

b. mobile segments of DNA

c. tiny circular molecules of RNA that can infect plants

d. misfolded versions of normal protein that can cause disease

2.) What is the function of reverse transcriptase in retroviruses?

Select one:

a. It uses viral RNA as a template for DNA synthesis.

b. It uses viral RNA as a template for making complementary RNA strands.

c. It translates viral RNA into proteins.

d. It converts host cell RNA into viral DNA.

3.) Which of the following accounts for someone who has had regular herpesvirus-mediated cold sore or genital sore flare-ups?

Select one:

a. re-infection by the same herpesvirus strain

b. copies of the herpesvirus genome permanently maintained in host nuclei

c. re-infection by a closely related herpesvirus of a different strain

d. copies of the herpesvirus genome permanently maintained in host cell cytoplasm

4.) Which of the following best describes the significance of the TATA box in eukaryotic promoters?

Select one:

a. Its significance has not yet been determined.

b. It is the recognition site for ribosomal binding.

c. It is the recognition site for a specific transcription factor.

d. It sets the reading frame of the mRNA.

5.) Which of the following can be effective in preventing the onset of viral infection in humans?

Select one:

a. taking antibiotics

b. getting vaccinated

c. taking vitamins

d. taking drugs that inhibit transcription

Explanation / Answer

1.) What are prions?

d. misfolded versions of normal protein that can cause disease

2.) What is the function of reverse transcriptase in retroviruses?

Select one:

a. It uses viral RNA as a template for DNA synthesis.

reverse transcriptase copies all or part of the virus RNA (retroviruses are RNA-only) as DNA which can then be integrated into the DNA of the host organism.

3.) Which of the following accounts for someone who has had regular herpesvirus-mediated cold sore or genital sore flare-ups?

b) copies of the herpesvirus genome permanently maintained in host nuclei

4.) Which of the following best describes the significance of the TATA box in eukaryotic promoters?

C.It is the recognition site for a specific transcription factor.

5.) Which of the following can be effective in preventing the onset of viral infection in humans?

b. getting vaccinated

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