National Open University Exam Past Question (BIO 305) March/April 2015

                                       

               

                                                                  National Open University of Nigeria

                                                            14-16 Ahmadu Bello Way, Victoria Island Lagos 

                                                                      School of science and technology

                                                                      March/April 2015 Examination

                  ^{COURSE CODE: BIO 305}

                  ^{COURSE TITTLE: MOLECULAR BIOLOGY}

                  ^{TIME ALLOWED: 2hrs}

                   ^{Instructions: ANSWER QUESTION 1 AND ANY OTHER 3 QUESTIONS}

^{1         1 (a) Describe how hormones control gene-expression.                                                                        8 marks}

      ^{(b) Outline the characteristics of genetic code.                                                                                    7 marks}

     ^{(C) List the major component of a nucleotide                                                                                      3 marks}

      ^{(d) Account for the relationship of molecular biology to other biological sciences                     7 marks}

^{2           (a) list the stages involved in the breakdown of glucose                                                                 4 marks}

             ^{(b) What is nucleic acid hybridization?                                                                                                 2marks}

              ^{(c) Write short note on the following:}

        ^{i. m RNA                                                                                                                               3 marks}

        ^{ii. t RNA                                                                                                                                3 marks}

        ^{iii. r RNA                                                                                                                              3 marks} 

^{3             (a) describe the process of oxidation phosphorylation                                                                    7 marks}

               ^{(b) Give an account of the central dogma.                                                                                          8marks}

^{4            (a) outline the important features of Glycolysis                                                                                6 marks}

     ^{(b) Escherichia coli is useful in biology discuss.                                                                                  9 marks}

^{5            (a) describe the structure of DNA                                                                                                          8 marks}

     ^{(b) Account for the relationship of molecular biology to other biological sciences                    7 marks}

^{6            (a) what do you understand by the term catabolism?                               3 marks}

              ^{(b) Give a detailed description of any two methods used for determining DNA sequences.     12marks} 


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