Question

Which of the following is a nucleotide found in DNA?

A) Adenine + Phosphate Group + Thymine.

B) Cytosine + Phosphate Group + Guanine.

C) Deoxyribose + Phosphate Group + Polymerase.

D) Deoxyribose + Phosphate Group + Cytosine.

Answer 1

deoxyribose+phosphate group+polymerase can be found in DNA molecule.   so D is the correct answer

Answer 2

Deoxyribose, phosphate group, and cytosine are nucleotides found in DNA.

Further Explanation:

The structure of DNA is mainly composed of different nucleotides. Each nucleotide comprises a pentose sugar, nitrogenous base (adenine, guanine, thymine, cytosine), and a phosphate group, but thymine is replaced with uracil in RNA structure. Nitrogenous bases in the DNA are composed of purines (adenine and guanine) and pyrimidine (cytosine and thymine). Pentose sugars (ribose) are one of the main components of the DNA. The sugar present in DNA deprives of an oxygen atom at second carbon and hence termed as deoxyribose.

Sugars and phosphate form the backbone of the DNA double helix. Covalent bond gives strength to the backbone supporting the structure of helix and providing stability to the DNA. Hydrogen bonds present between the nitrogenous bases are the weak bonds. These bonds can easily be broken by the enzymes to separate the two strands during the process of replication.

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Answer Details:

Grade: High school

Subject: Biology

Chapter: DNA

Keywords:

Sugar, enzyme, strands, carbon, oxygen, nitrogenous base, replication, second carbon, guanine, thymine, cytosine, nucleotide.