NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
JULY 2017 EXAMINATION

COURSE CODE: BIO 305

COURSE TITLE: MOLECULAR BIOLOGY

CREDIT: 2 units

TIME ALLOWED: 2 Hours

INTRUCTION: Answer question ONE (1) and any other THREE (3) questions

1. (a) What do you understand by the tern catabolism? (3 marks)

    (b) Outline the importance of genes in heredity. (4 marks)

    (c) Enumerate the characteristics of genetic code. (9 marks)

    (d) Write short notes on the following:

          i. m RNA (3 marks)

         ii. t RNA (3 marks)

        iii. r RNA (3 marks)

2. (a) Define the term DNA sequencing. (2 marks)

    (b) Describe in details any two methods for determining DNA sequences. (13 marks)

3. (a) Outline the important features of glycolysis. (6 marks)

    (b) Describe the various steps involved in the process of chain elongation stage during protein synthesis. (9 marks)

4. (a) Give a detailed description of the process of oxidative phosphorylation. (8 marks)

    (b) Give an account of the relationship between Molecular Biology and other Biological Sciences. (7 marks)

5  (a) Summarize the roles of DNA and RNA (4 marks)    

    (b) Describe with examples and illustrations the human genetic disorders. (11 marks)