Botany-DNA Structure
NEET Botany DNA Structure MCQ Question
Type: MCQ-diagram based-Hard-Class 12
A diagram depicts a DNA double helix with labeled strands showing 5' and 3' ends. If one strand is labeled as the template strand in a transcription unit, which characteristic correctly identifies the template strand?
A
It has a 3' to 5' polarity.
B
It has a 5' to 3' polarity.
C
It contains uracil instead of thymine.
D
It is identical to the mRNA sequence.
Correct Answer
Option A
Detailed Explanation
The template strand in a transcription unit has a 3' to 5' polarity, as it is the strand RNA polymerase uses for transcription. This is mentioned in the NCERT context regarding DNA structure and transcription.
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