In a typical nucleotide, the phosphate group is attached to carbon no. ….of pentose sugar.
a) 1
b) 2
c) 3
d) 5
The linkage between two nucleotides in nucleic acid chain is………..
a) phosphodiester bond
b) polar covalent bond
c) glycosidic bond
d) hydrogen bond
Explanation: A phosphodiester bond is a chemical bond that forms when exactly two hydroxyl groups in phosphoric acid react with a hydroxyl group on other molecules forming ester bonds.
Nitrogenous
bases are classified into ……..main types.
a) two
b) three
c) four
d) five
Explanation: Purines and Pyrimidines
Pyrimidines are single ring compounds which are further classified into..…types
a) two
b) three
c) four
d) five
Explanation: Thymine, Cytosine and Uracil
Purines are double ring compounds which are further classified into..…types
a) two
b) three
c) four
d) five
Explanation: Adenine and Guanine
Nucleotides are classified into…….types.
a) two
b) three
c) four
d) five
Explanation: mononucleotides, dinucleotides and polynucleotide
