Nucleotides and Nucleosides

Q. The three chemically distinct components in a nucleotide are

1. a heterocyclic compound, a disaccharide and a phosphate group
2. a heterocyclic compound, a disaccharide and a hydroxyl group
3. a heterocyclic compound, a monosaccharide and a phosphate group
4. a heterocyclic compound, a monosaccharide and a hydroxyl group

Q.

Who Discovered Nucleic Acid?

Q. Energy is stored in our body in the form of _________.

1. ATP
2. ADP
3. Fats
4. Carbohydrates

Q. A is composed of sugar molecule and nitrogen base.

1. nucleotide
2. nucleoside
3. nucleic acid
4. nucleosome

Q.

Regarding the assertion and reason; choose the correct option.

Assertion [A] : All living organisms contain 20 types of amino acids and 5 nucleotides.

Reason [R] :The living cells contain A, G, C, T and U nitrogenous bases.

1. Assertion [A] is True and Reason [R] is False.

2. Reason [R] is True and Assertion [A] is False.
3. Assertion [A] is True and Reason [R] is True and is a correct explanation for [A].
4. Assertion [A] is True and Reason [R] is True but it does not explain [A].

Q. Compounds that contain a nitrogenous base, a sugar, and a phosphate group are called (i)_______. The nitrogenous bases that bind to the sugar are of two types;(ii)______and (iii)______, and they are linked to the sugar through (iv)______ bond.

1. (i) Nucleotides (ii) Pyrimidines (iii) Purines (iv) N-glycosidic bond

2. (i) Nucleosides (ii) Purines (iii) PAH (iv) Peptide

3. (i) Nucleotides (ii) Purines (iii) Pyrimidines (iv) Phosphodiester

4. (i) Nucleotides (ii) Purines (ii) Pyrimidines (iii) Disulfide

Q. The three chemically distinct components in a nucleotide are

1. a heterocyclic compound, a disaccharide and a phosphate group
2. a heterocyclic compound, a disaccharide and a hydroxyl group
3. a heterocyclic compound, a monosaccharide and a phosphate group
4. a heterocyclic compound, a monosaccharide and a hydroxyl group

Q. Nucleotides take part in:

1. Information transfer system
2. Energy transfer system
3. Formation of $NA{D}^{+}$ and FAD, which act as coenzymes of oxidising enzymes
4. All of these

Q.

Identify the following images i to iv and choose the correct option.

1. Nucleotides
2. Nucleosides
3. Purines
4. Pyrimidines

Q. Nucleotides are bound to each other by bond in a nucleic acid.

1. peptide
2. glycosidic
3. phosphodiester
4. disulphide