Question:
In DNA molecule, pairing between two complementary nucleotides takes place by ________ bonds.
In DNA molecule, pairing between two complementary nucleotides takes place by ________ bonds.
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Hydrogen bonds provide stability yet allow easy separation of DNA strands during replication.
Updated On: Mar 6, 2026
- phospho-di-ester
- peptide
- hydrogen
- glycosidic
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The Correct Option is C
Solution and Explanation
Step 1: Understanding DNA structure.
DNA consists of two antiparallel polynucleotide strands forming a double helix.
Step 2: Base pairing mechanism.
Complementary nitrogenous bases pair with each other through hydrogen bonds: adenine with thymine via two hydrogen bonds and guanine with cytosine via three hydrogen bonds.
Step 3: Eliminating other options.
Phospho-di-ester bonds join nucleotides within a strand, peptide bonds join amino acids, and glycosidic bonds link sugars to bases.
Step 4: Conclusion.
Thus, complementary nucleotides in DNA are held together by hydrogen bonds.
DNA consists of two antiparallel polynucleotide strands forming a double helix.
Step 2: Base pairing mechanism.
Complementary nitrogenous bases pair with each other through hydrogen bonds: adenine with thymine via two hydrogen bonds and guanine with cytosine via three hydrogen bonds.
Step 3: Eliminating other options.
Phospho-di-ester bonds join nucleotides within a strand, peptide bonds join amino acids, and glycosidic bonds link sugars to bases.
Step 4: Conclusion.
Thus, complementary nucleotides in DNA are held together by hydrogen bonds.
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