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5.Molecular Basis of Inheritance
medium
The two strands of a double helix model of $DNA$ are held together by hydrogen bonds between
A
sugar and phosphate groups.
B
sugar and nitrogenous bases.
C
phosphate groups and nitrogenous bases.
D
nitrogenous bases.
Solution
The two strands of a double helix model of $DNA$ are held together by hydrogen bonds between nitrogenous bases which help to stabilize the interaction. Adenine – thymine pair has two hydrogen bonds while guanine – cytosine pair has three hydrogen bonds.
Standard 12
Biology
