Botany-DNA Structure
NEET Botany DNA Structure MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Which of the following statements about DNA structure is correct?
A
DNA is packaged in the nucleus as a long, continuous helix without interruptions.
B
Eukaryotic genes are often monocistronic and have exons interrupted by introns.
C
The length of DNA in eukaryotic cells is shorter than that in prokaryotic cells.
D
Base pairs in DNA are spaced 0.25 nm apart.
Correct Answer
Option B
Detailed Explanation
Eukaryotic genes are primarily monocistronic and contain exons and introns, where exons are expressed sequences while introns are interrupted sequences that do not appear in mature RNA. This aligns with the NCERT context explaining gene structure.
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