Multiple Choice
Why does DNA need to transfer some of its information into RNA molecules during the process of gene expression?
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15. Gene Expression
Central Dogma
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Which is the correct order of the central dogma of biology?
A
RNA \( \rightarrow \) DNA \( \rightarrow \) Protein
B
DNA \( \rightarrow \) RNA \( \rightarrow \) Protein
C
Protein \( \rightarrow \) RNA \( \rightarrow \) DNA
D
DNA \( \rightarrow \) Protein \( \rightarrow \) RNA
Verified step by step guidance1
Understand the central dogma of biology: It describes the flow of genetic information within a biological system, explaining how DNA is transcribed into RNA and how RNA is translated into proteins.
Recall the key processes involved: Transcription is the process where DNA is converted into RNA, and translation is the process where RNA is used to synthesize proteins.
Eliminate incorrect options: RNA cannot be converted back into DNA in the central dogma (though reverse transcription exists in some viruses, it is not part of the standard central dogma). Similarly, proteins cannot be converted into RNA or DNA.
Identify the correct sequence: The central dogma follows the order DNA → RNA → Protein, where DNA serves as the template for RNA synthesis, and RNA serves as the template for protein synthesis.
Confirm the correct answer: The correct order is DNA → RNA → Protein, as this reflects the standard flow of genetic information in cells.
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