LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

MOLECULAR BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Molecules of DNA are composed of long chains of:
A
Nucleotides
B
Amino acids
C
Monosaccharides
D
Fatty acids
Explanation: 

Detailed explanation-1: -A DNA molecule consists of two long polynucleotide chains composed of four types of nucleotide subunits. Each of these chains is known as a DNA chain, or a DNA strand. Hydrogen bonds between the base portions of the nucleotides hold the two chains together (Figure 4-3).

Detailed explanation-2: -In the smallest human chromosomes this DNA molecule is composed of about 50 million nucleotide pairs; the largest chromosomes contain some 250 million nucleotide pairs. The diploid human genome is thus composed of 46 DNA molecules of 24 distinct types.

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