National Open University Exam Past Question (BIO 303) OCTOBER 2013

                                      

                                                  

                                                                National Open University of Nigeria

                                                            14-16 Ahmadu Bello Way, Victoria Island Lagos 

                                                                      School of science and technology

                                                                           OCTOBER 2013 Examination

                 

                  ^{COURSE CODE: BIO 303}

                  ^{COURSE TITTLE: GENERAL CYTOLOGY} 

                  ^{TIME ALLOWED: 2hrs}

                   ^{Instructions: ANSWER 4 QUESTION}

^{1.                a. define the following terms}

^{i.                                           cytogenetics}

^{ii.                                         cytology}

^{iii.                                       genetics}

^{b. i. mention the different type of structural chromosomal variations}

   ^{ii. Define each of the mentioned structural chromosomal variations}

^{c. i. what is the numerical chromosomal variation}

    ^{ii. Mention the different types of numerical chromosomal variations.}

^{2.                a.  mention the general cytogenetic procedure synonymous to all cytogenetic techniques}

^{b. i. define karyotype} 

^{3.                ii. After karyotyping mention the observable characteristics in the chromosomes}

^{c. outline the importance and application of cytogenetics}

  ^{3.    a. Mention the molecular composition of the cell}

         ^{b. state the functions importance of protein in a living cell}

         ^{c. mention the different type of nucleic acids}

         ^{d. outline the roles of the different type of nucleic acid}

 ^{4.      i. mention the two major phase of cell cycle}

          ^{ii. Name the five stages of mitosis}

          ^{iii. Define the word EMBRYOLOGY}

          ^{iv. Mention the stages of Embryogenesis}

          ^{v. explain briefly the word Diaknesis}

^{5.      a. three major control check points exist during the course of eukaryotic cell cycle , mention these check points explain any of the 1 on}

              ^{this check points}

         ^{b. in a tabular form make a brief comparism between RNA and proteins}

^{6.     a. state the functions of the following part of a light microscope}

         ^{I. eye piece}

         ^{ii. Body tube}

        ^{iii. Objectives}

         ^{iv. Diaphragm}

         ^{v. stage}

      ^{b. state the advantages of phase contrast microscope}

      ^{c define dark field microscopy}

      ^{d. mention two advantages of an electron microscope} 

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