Multiple Choice
Which of the following is not transcribed from DNA during the process of transcription?
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15. Gene Expression
Central Dogma
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Which of the following is an exception to the central dogma of molecular biology?
A
Transcription of DNA to RNA
B
Replication of DNA
C
Reverse transcription in retroviruses
D
Translation of mRNA to protein
Verified step by step guidance1
Understand the central dogma of molecular biology, which describes the flow of genetic information: DNA is transcribed into RNA, and RNA is translated into protein. This is the standard process in most organisms.
Recognize that DNA replication is not part of the central dogma but is a separate process where DNA is copied to produce identical DNA molecules.
Learn about reverse transcription, which is an exception to the central dogma. In retroviruses, RNA is reverse-transcribed into DNA using the enzyme reverse transcriptase. This process deviates from the usual flow of information.
Compare reverse transcription to the other processes listed: transcription (DNA to RNA) and translation (RNA to protein), which follow the central dogma, and replication, which is not an exception but a separate process.
Conclude that reverse transcription in retroviruses is the correct answer because it represents a deviation from the standard flow of genetic information described by the central dogma.
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