Question:
As regards transcription, the prototype enhancer discovered in the animal virus SV40 is a sequence of __________ base pairs.
As regards transcription, the prototype enhancer discovered in the animal virus SV40 is a sequence of __________ base pairs.
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This classic viral enhancer is remembered specifically as a repeated segment of this length.
Updated On: Jul 4, 2026
- 7
- 72
- 27
- 127
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The Correct Option is B
Solution and Explanation
Step 1: Enhancers are DNA regulatory elements that can boost transcription of a gene regardless of their distance or orientation relative to it.
Step 2: The very first enhancer element identified, which became the prototype for studying all subsequent enhancers, was found in the genome of the animal virus SV40 (Simian Virus 40) as a 72 base pair repeated sequence.
Step 3: The other numbers listed do not correspond to this classic discovery.
Step 4: So the correct answer is 72 base pairs.
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