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Cell Biology Question Paper

Cell Biology

Course:Bachelor Of Education Science

Institution: Egerton University question papers

Exam Year:2003

UNIVERSITY EXAMINATIONS

SECOND SEMESTER 2002/2003

YEAR TWO EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN AGRICULTURAL EDUCATION AND BACHELOR OF EDUCATION (SCIENCE)

ZOOL 201- CELL BIOLOGY

TIME: 2HRS

INSTRUCTIONS:

SECTION A: Attempt all Questions ( 40 marks)

1.Complete the following statements.( 5mks)

(a) Cell wall of Gram positive bacteria is mainly made up of----------

(b) Peroxisomes are involved in synthesis of------

(c) -----------is a function of lysosomes in which old organelles fuse with lysosomes to be degraded.

(d) The marker enzyme for golgi complex is-------

(e) The form of meiosis observed in unicellular organisms--------

2.(a) Complete the table below:

Mitochondrial compartment.

Metabolic activity

(i)--------------------------------------------------------- Synthesis of cardiolipin

(ii)-------------------------------------------------------ATP synthesis

(iii) Inner membrane----------------------------------------------------------------

(iv) Matrix-----------------------------------------------------------------------------

(v)---------------------------------------------------------Ketone body metabolism(5 mks)

(b) Give the functional differences between:

(i) Microtubules and mictofilaments.

(ii) Coatomer-coated vesicle and phagolysosome

(iii) Nucleolus and terminal differentiation.(6 mks)

3.(a) Describe briefly the composition of extracellular matrix of bone tissue.(3 mks)

(b) Explain how rate of cell cycle is regulated in tissues.(3 mks)

(c) State the significance of meiosis.(4mks)

4.(a) State the features of active transport.(5 mks)

(b) Describe briefly how glucose is transported uphill from gut lumen into blood stream.(5 mks)

(c) List the functions of plant cell vacuole.(4 mks)

SECTION B: Attempt Two questions only.(30 mks).

5.(a) Give an illustration of a generalized animal cell.(5 mks)

(b) Describe how chloroplast uses carbon dioxide to make glucose.(10 mks)

6.(a) Describe, using an illustration, the fluid-mosaic model of plasma membranes.(5 mks)

(b) Outline the functions of endoplasmic reticulum.(5 mks)

(c) Give a brief account on formation of plant cell wall.(5 mks)

7.(a) Give evidence to show that cellular ageing is a genetically programmed event.(5mks)

(b) Describe the process of meiotic cell division.(10 mks)

Cell Biology Question Paper

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