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What is DNA in a cell?
Question

What is DNA in a cell?

A.

Carboxyl acid

B.

Fatty Acids

C.

Nucleic Aciid

D.

Amino Acids

Correct option is C

The correct answer is (c) Nucleic Acid

Explanation:

DNA (Deoxyribonucleic Acid) is a nucleic acid that carries genetic information in all living organisms. It is present in the nucleus of eukaryotic cells and in the cytoplasm of prokaryotic cells.

  • DNA is made up of nucleotides, each consisting of:
    1. A phosphate group
    2. A deoxyribose sugar
    3. A nitrogenous base (Adenine, Thymine, Cytosine, or Guanine)
  • The structure of DNA is a double helix, discovered by James Watson and Francis Crick in 1953.
  • It carries instructions for protein synthesis and is responsible for hereditary traits.

Information Booster:

Functions of DNA:

  • Stores genetic information – Determines physical and functional traits of an organism.
  • Controls protein synthesis – Provides the code for making proteins.
  • Passes traits to offspring – Through replication during cell division.
  • Mutations lead to evolution – Changes in DNA sequences drive evolution and genetic diversity.

Difference Between DNA & RNA:

Feature

DNA

RNA

Sugar

Deoxyribose

Ribose

Strands

Double-stranded

Single-stranded

Bases

A, T, C, G

A, U, C, G

Function

Stores genetic information

Helps in protein synthesis

Additional Knowledge:

  • Carboxyl Acid): Carboxyl acids are organic acids found in fatty acids and amino acids.
  • Fatty Acids:fatty acids are components of lipids (fats), not genetic material.
  • Amino Acids: Amino acids are building blocks of proteins, while DNA codes for proteins.

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