Question

What is an exception to the central dogma of molecular biology?
A. Viruses sometimes transfer information from RNA to DNA.

B. Viruses sometimes transfer information from DNA to RNA.

C. Viruses sometimes transfer information from proteins to DNA.

D. Viruses can translate without RNA

Answer 1

Answer is Viruses transfer information from RNA to DNA.
The Central dogma of molecular biology shows that information transfers from
DNA >> RNA >> Proteins.
In case of Viruses for eg: retro viruses uses the RT enzyme and synthesis the cDNA from the RNA template.

Answer 2

chaitubio is right. The answer is A.

And chaitubio's answer is all in order. It's perfectly explained, in my opinion.

DNA is usually copied into RNA, through "transcription."

I bet you've talked about transcription in your biology class.

And chaitubio is right, in that "retroviruses" actually do things a little differently.

The word "retro" means "backward."

So instead of copying DNA into RNA,
retroviruses copy RNA into DNA.
And to do that, they use RT, which is "reverse transcriptase."

HIV is an example of a retrovirus.
You know, the virus that causes AIDS.