Answered

Which best describes the structure of a nucleotide?
A. Base, sugar ring, and phosphate
0 B. A base and a protein
0000
0 C. Cytosine and guanine
D. Thymine and adenine

Verified Answer :

GinnyAnswer

The correct answer is:

A. Base, sugar ring, and phosphate

Explanation:
1. A nucleotide is the basic building block of nucleic acids like DNA and RNA.

2. It consists of three main components:
- Base: The nitrogenous base (adenine, thymine, cytosine, guanine, or uracil in RNA) that pairs with another base in DNA or RNA.
- Sugar ring: A five-carbon sugar molecule (deoxyribose in DNA or ribose in RNA) that forms the backbone of the nucleic acid strand.
- Phosphate group: A phosphorus atom bound to four oxygen atoms, linking the nucleotides together in a chain.

3. The combination of a nitrogenous base, sugar molecule, and phosphate group forms a nucleotide, which then joins with other nucleotides to create DNA or RNA molecules.

This structure of a nucleotide is crucial for the genetic information storage and transfer processes within living organisms.

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