AIPMT MAIN2008Botany-Molecular Basis of Inheritance
AIPMT MAIN 2008 Botany Structure of DNA MCQ Question
Type: MCQ-conceptual-Medium-Class 12
In the DNA molecules
A
There are two strands which run antiparallel-one in 5'→3' direction and other in 3'→5'
B
The total amount of purine nucleotides and pyrimidine nucleotides is not always equal
C
There are two strands which run parallel in the 5'→3' direction
D
The proportion of Adenine in relation to thymine varies with the organism
Correct Answer
Option A
Detailed Explanation
The two strands of DNA are antiparallel, meaning they run in opposite directions: one strand runs 5' to 3' and the other 3' to 5'. This arrangement is crucial for the complementary base pairing and replication of DNA.
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