4. Nitrogen Bases

Question 1

N-base is the nitrogen-containing ______ rings found in nucleic acids.

Answer 1

heterocyclic rings

Question 2

Types of N-base:

Answer 2

a. Purines (Adenine(A) & Guanine(G))
b. Pyrimidines (Cytosine(C), Thymine(T) & Uracil (U))

Question 3

• Structures of N-base

Answer 3

*Purine (9-membered double-ring structure and N-1,3,7,9)

*Pyrimidine (6 membered single ring structure and N-1,3)

Question 4

Topic - Nucleoside

Question 5

In Nucleoside, N-base is attached to ______

Answer 5

Pentose Sugar

Question 6

Nitrogen base + Pentose Sugar =

Answer 6

Nucleoside

Question 7

a. Adenine + Sugar =
b. Guanine + Sugar =
c. Cytosine + Sugar =
d. Thymine + Sugar =
e. Uracil + Sugar =

Answer 7

a. Adenine + Sugar = Adenosine
b. Guanine + Sugar = Guanosine
c. Cytosine + Sugar = Cytidine
d. Thymine + Sugar = Thymidine
e. Uracil + Sugar = Uridine

Question 8

______ is a Nucleoside present only in RNA.

Answer 8

Uridine

Question 9

• Structure of Adenosine & Uridine

Question 10

Topic - Nucleotide

Question 11

In Nucleotide, N-base is attached to Pentose Sugar which is esterified to a ______ group.

Answer 11

phosphate group

Question 12

Nitrogen base + Pentose Sugar + Phosphate Group =

Answer 12

Nucleotide

Question 13

Each nucleotide is a composite molecule formed by base-sugar-phosphate.
T/F

Answer 13

True

Question 14

a. Adenine + Sugar + Phosphate =
b. Guanine + Sugar + Phosphate =
c. Cytosine + Sugar + Phosphate =
d. Thymine + Sugar + Phosphate =
e. Uracil + Sugar + Phosphate =

Answer 14

a. Adenine + Sugar + Phosphate = Adenylic acid
b. Guanine + Sugar + Phosphate = Guanylic acid
c. Cytosine + Sugar + Phosphate = Cytidylic acid
d. Thymine + Sugar + Phosphate = Thymidylic acid
e. Uracil + Sugar + Phosphate = Uridylic acid

Question 15

• Structure of Adenylic Acid, Adenosine, Uridine

Question 16

Topic - Nucleic_Acids

Question 17

Types of Nucleic acids:

Answer 17

a. DNA (Deoxyribonucleic acid having deoxyribose)
b. RNA (Ribonucleic acid having Ribose sugar)

Question 18

Nucleic acids are ________ and made up of ______ and function as genetic material.

Answer 18

DNA & RNA;
Nucleotides

Question 19

Nucleotides are building blocks of nucleic acids.
T/F

Answer 19

True