Question

DNA is a polymer of
(a) Proteins
(b) Carbohydrates
(c) RNA
(d) Nucleotides

Answer 1

Hint: These are organic molecules consisting of a nucleoside and a phosphate. They serve as monomeric units of the nucleic acid polymers deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) , both of which are essential biomolecules within all life- forms on Earth.

Correct step by step answer:
DNA is a polymer of nucleotides. The nucleotides are the elementary unit that forms DNA. Nucleotides are composed of three subunit molecules: a nitrogenous base, a five- carbon sugar (a pentose sugar: ribose or deoxyribose) , and a phosphate group consisting of one to three phosphates DNA is formed through phosphorylation of nucleoside. The chain of nucleotides or the polymer of nucleotides is the DNA. It is acidic in nature. There are four different types of nucleotides found in DNA, the only difference among them is of the nitrogenous base. The four nitrogenous bases in DNA are guanine, adenine, cytosine, and thymine; in RNA, uracil is used in place of thymine.

The abbreviation for these nucleotide bases are as follows:
A is for adenine
G is for guanine
C is for cytosine
T is for thymine
U is for uracil
So, the correct answer is, ’Nucleotides’.

Note:
- Adenine and guanine are purines. Purines are the larger of the 2 sorts of bases found in DNA.
- The deoxyribose sugar of the DNA backbone has 5 carbons and three oxygens. The carbon atoms are numbered 1', 2', 3', 4', and 5' to distinguish from the numbering of the atoms of the purine and pyrimidine rings.
- The hydroxyl groups on the 5'- and 3'- carbons link to the phosphate groups to make the DNA backbone. Deoxyribose lacks a hydroxyl at the 2'-position in comparison to ribose, the sugar component of RNA.
- DNA is a normal double- stranded macromolecule. Two polynucleotide chains form a DNA molecule, being held together by weak thermodynamic forces.