Question

A nucleic acid molecule is a linear polymer in which the monomers-nucleotides are linked together by

• A. Hydrophobic interactions
• B. Ionic bonds
• C. Phosphodiester bonds
• D. Hydrogen bonds

Hint:

Phosphodiester bonds:
- Link nucleotides in nucleic acids.
- Formed between 3' OH and 5' phosphate.
- Hydrogen bonds: Hold complementary base pairs together.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
This question tests knowledge of nucleic acid structure.

Step 2: Detailed Explanation:
Nucleotides are linked together by phosphodiester bonds.
These bonds form between the 3' hydroxyl group of one nucleotide and the 5' phosphate group of the next.
This creates the sugar-phosphate backbone of DNA and RNA.
Hydrophobic interactions (A): Hold base pairs together in double helix.
Ionic bonds (B): Not the primary link between nucleotides.
Hydrogen bonds (D): Hold complementary base pairs together.
Thus, nucleotides are linked by phosphodiester bonds.

Step 3: Final Answer:
Thus, nucleotides are linked by phosphodiester bonds, which corresponds to option (C).
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