Question

the information carried by a dna molecule is stored in the —
a number of nucleotides in the dna of individual genes
b hydrogen bonds that hold the strands of dna together
c chemical bonds that join the parts of a dna molecule
d sequence of nitrogenous bases along the strands of dna

Explanation:

To determine where DNA stores information, we analyze each option:

• Option A: The number of nucleotides in genes doesn't encode information; it's the order, not quantity, that matters.
• Option B: Hydrogen bonds hold DNA strands together (for structure) but don't store genetic info.
• Option C: Chemical bonds (like phosphodiester bonds) link DNA parts structurally, not for information storage.
• Option D: DNA’s genetic information is stored in the sequence of nitrogenous bases (A, T, C, G) along its strands, as this sequence codes for proteins and traits.

Answer:

D. sequence of nitrogenous bases along the strands of DNA