ExamsSchool of Agricultural Sciences

National Open University Exam Past Question – ANP310

NATIONAL OPEN UNIVERSITY OF NIGERIA ANP310 GENETICS AND BREEDING

14-16 AHMADU BELLO WAY, VICTORIA ISLAND LAGOS

SCHOOL OF AGRICULTURAL SCIENCES

OCTOBER/NOVEMBER 2014 EXAMINATION

 

COURSE CODE: ANP310

COURSE TITLE: GENETICS AND BREEDING

Time: 2 Hours

INSTRUCTION: 6 QUESTIONS ANSWER 4

 

1a. Write a shot note on the historical background of study of cells and cell structure.

1b. Draw and label the different parts of animal cell

 

2a. Which component of the cell is referred to as the “Power house” of the cell (1 mark) and why?

2b. Briefly discuss any three (3) chemical composition of cell.

2c. What are the function of inorganic salts? Give examples of ten (10) inorganic salts found in the cell.

 

3a.Write short note on the functions of the any five (5) of the following cell components. a)  Golgi body

  1. b) The Cell Wall
  2. c) Endoplasmic reticulum d) Lysosomes
  3. e) Microbodies f)  Vacuoles
  4. g) Nucleus

3b. List the chemical composition of chloroplasts and their percentage make up in the cell.

 

4a. Cells of multi-cellular organisms have different shapes. The diagram below, shows the diversity in cell shapes, name any ten (10).

4b. Distinguish between plant and animal cell?

4c. State the properties of cell membrane and its function?

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5a. Explain the principles of inheritance according to Knight.

5b. With the aid of diagram give a brief description of structure of DNA and RNA.

5c. Differentiate between cell division and cell multiplication.

 

6a. What do you understand by Cytokinensis in cell.

6b. What are the significances of mitosis?

6c. Write a short note of the followings a.  Lethal genes

  1. b. Complimentary genes c.  Additive genes
  2. d. Mutation
  3. Epistasis

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