Question 01- Multiple Choice Questions

1) Which of the following is responsible for expression of a trait?

A) Recon   
B) Muton
C) Cistron
D) Codon

2) Which of the following is a pyrimidine base?

A) Uracil
B) Adenine
C) Guanine
D) Riboflavin

3) On which strand of DNA m RNA is constructed?

A) Stand Oriented As 5' →  3' 
B) Stand Oriented As 3' →  5'

C) Both The Strands
D) Any One Strand 

4) The bonds joining two successive nucleotides of DNA stand are called -----

A) Phospho-DI Ester Bonds 
B) Covalent Bonds 
C) Hydrogen Bonds 
D) Glycosidic Bonds 

5) In which of the following stage, does synthesis of polypeptide takes place? 

A) Transcription 
B) Translation 
C) Teminism
D) Replication 

6) Unwinding of DNA strands is done by which enzyme? 

A) Amylase 
B) Endonuclease
C) Transcriptase 
D) Helicase 

7) Which of the following is a stop codon ? 

A) AUG 
B) GUG
C) UAA
D) GGU

8) Which of the following is the smallest rna

A) T -RNA 
B) M-RNA
C) R-RNA
D) DS-RNA 

9) Lac -Operon is related with -----

A) Lactose Metabolism
B) Starch Metabolism
C) Lipid Metabolism
D) Protein Metabolism 

10 ) Entry of lactose in cell is influenced by---

A) Permease
B) Aldolase
C) Ligase
D) Transcriptase 

Question 02- Explain the following diagram -(DNA replication)  

Question 03- Describe in detail following diagram ---(translation)  

Question 04 - Give diagrammatic representation of DNA molecule .

Question 05- What is RNA ? Mention its types and give the functions of each 

Question 06- Describe the process of transcription in protein synthesis 

Question 07 - Structure of DNA molecule--- explain it under following heads 

1) DNA molecule as a double helix

2) complementary base pairing 

3) purine : pyrimidine ratio

4) polarity of strands 

Question 08-following is known as central dogma of protein synthesis. explain the phenomenon.