Q1
The genetic material in most organisms is:
📝 SolutionDNA (deoxyribonucleic acid) is the genetic material in most organisms, carrying hereditary information.
Q2
The two strands of DNA are held together by:
📝 SolutionThe two DNA strands are held together by hydrogen bonds between complementary nitrogenous base pairs.
Q3
In DNA, adenine pairs with:
📝 SolutionBy complementary base pairing, adenine (A) pairs with thymine (T) via two hydrogen bonds in DNA.
Q4
In DNA, guanine pairs with:
📝 SolutionGuanine (G) pairs with cytosine (C) via three hydrogen bonds.
Q5
The double helix model of DNA was proposed by:
📝 SolutionJames Watson and Francis Crick proposed the double helix model of DNA structure in 1953.
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Class 12 · Biology
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