The Central Dogma Has Been Challenged on Several Levels (E

question 33

Multiple Choice

The central dogma has been challenged on several levels (e.g. ,the discovery of RNA viruses,which use their RNA to directly synthesize proteins;and the discovery of reverse transcriptase,which makes DNA from RNA) .Which of the following is another example of an exception to the central dogma?

• A)DNA from viruses can insert themselves into host cell chromosomes.
• B)Chaperone molecules guide the folding of protein molecules.
• C)Gene mutations result in altered amino acid sequences of proteins.
• D)Prions are infectious protein molecules capable of altering the folding of normal proteins.

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Definitions:

Cystostomy

A surgical procedure that creates an opening in the urinary bladder to facilitate urine drainage.

Wound

An injury to living tissue caused by a cut, blow, or other impact, typically one in which the skin is cut or broken.

Clean-Catch Midstream

A urine collection method that minimizes contamination, involving cleansing then collecting urine mid-flow.

Culture And Sensitivity

A laboratory test that identifies pathogens present in a sample and determines which antibiotics will be effective against them.