LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What are the repeating units that form a DNA molecule?
A
Fatty acids
B
Nucleotides
C
Amino Acids
D
Chromosomes
Explanation: 

Detailed explanation-1: -Repeating units in DNA molecule is nucleotides. It contains phosphoric acid, nitrogenous base and deoxyribose sugar. Nitrogen base like Adenine, Guanine, Cytosine and Thymine are present.

Detailed explanation-2: -DNA is made up of four building blocks called nucleotides: adenine (A), thymine (T), guanine (G), and cytosine (C). The nucleotides attach to each other (A with T, and G with C) to form chemical bonds called base pairs, which connect the two DNA strands.

Detailed explanation-3: -If multiple nucleotides are linked together, as in DNA, this polymer is called a polynucleotide. The backbone of the DNA strand is made from alternating phosphate and sugar residues. The sugar in DNA is 2-deoxyribose, which is a pentose (five-carbon) sugar.

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