Note: The quiz has five questions. Each has two option one true and other false.

Q.1  D.N.A has

a) double stranded molecule with Thymine base pair

b) double stranded molecule with Uracil base pair

Ans. (a)

Thymine (Pyrimidine) is also known as 5-methyl Uracil. In R.N.A, thymine is replaced by the Nucleobase Uracil.

Q.2  D.N.A replication is the biological process of producing

a) two identical replicas of D.N.A

b) three identical replicas of D.N.A

Ans. (a)

D.N.A replication is the biological process of producing two identical replicas of D.N.A from one original D.N.A molecule. D.N.A replication is fundamental to all living organism and the main theme of biological inheritance.

Q.3  In molecular biology Translation is the process of formation of

 a)  R.N.A –> Protein

 b)  D.N.A –> R.N.A

Ans. (a)

Translation is the process by which a protein is synthesized from the information contained in a molecule of messenger R.N.A (m-R.N.A). translation occur in a structure called the ribosome, which is known as the factory for protein synthesis.

Q.4  In molecular biology Transcription is the process of formation of

 a)  D.N.A –> R.N.A

 b)  R.N.A –> Protein

Ans. (a)

Transcription is the process by which the information of D.N.A is copied into a molecule of messenger R.N.A (m-R.N.A) by the enzyme R.N.A polymerase.

Q.5  In nucleic acid two nucleotides are linked through  

a)  Phosphodiester linkage

b)  Glycosidic linkage          

Ans. (a)  

In D.N.A and R.N.A, the phosphodiester bond is the linkage between the 3’ carbon atom of one sugar molecule and 5’ carbon atom of another. Strong covalent bonds form between the phosphate group and two 5-carbon ring carbohydrates (pentose) over two ester bonds.