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Bota 415: Cell Biology Y4s1 Question Paper

Bota 415: Cell Biology Y4s1

Course:Bachelor Of Education Science

Institution: Kabarak University question papers

Exam Year:2009

KABARAK UNIVERSITY
UNIVERSITY EXAMINATIONS
2009/2010 ACADEMIC YEAR
FOR THE DEGREE OF BACHELOR OF SCIENCE IN
EDUCATION SCIENCE
COURSE CODE: BOTA 415
COURSE TITLE: CELL BIOLOGY

INSTRUCTIONS:
Attempt all Questions in Section A and Any Two in Section B

SECTION A (40 MARKS)
1. (a) Explain the meaning of ‘cell doctrine’. (3 Marks)
(b) Describe the molecular structure of cell organelles. (2 Marks)

2. (a) Describe one similarity between oxidative phosphorylation in mitochondria
and oxidative phosphorylation in chloroplasts. (1 Mark)
(b) Describe the relationship between endoplasmic reticulum, vacuolar system and
Golgi apparatus. (3 Marks)
(c) Explain the functions of any three plastids found in plant cells. (3 Marks)

3. (a) Describe two characteristics of cells that give mechanical strength to plants.
(2 Marks)
(b) Describe the composition of the ‘stele’. (3 Marks)

4. (a) Describe the significance of water in electron transport system. (3 Marks)
(b) Describe three functions of cell walls. (3 Marks)

5. (a) Explain the meaning of the term ‘ amphipathic’. (1 Mark)
(b) With aid of a well labelled diagram, explain the bileaflet model of a plasma
membrane. (3 Marks)

6. (a) Describe the properties on which Davson- Danielle plasma membrane model
was based. (3 Marks)
(b) Explain two differences between Davson- Danielli plasma membrane model
and Robertson’s unit membrane hypothesis. (2 Marks)

7. (a) Explain how passive transport takes place in a given cell. (3 Marks)
(b) Explain the similarities between active transport and enzyme behaviour.
(2 Marks)
8. (a) Explain the relationship between the nuclear envelope and endoplasmic
reticulum. (1 Mark)
(b) Describe the composition of the nuclear gel. (2 Marks)

SECTION B (30 MARKS)
9. Describe the chemical composition of plasma membrane. (15 Marks)
10. Describe the structure and functions of the various plant cells. (15 Marks)
11. Describe the structure and functions of mitochondrial cristae and elementary
particles. (15 Marks)

Bota 415: Cell Biology Y4s1 Question Paper

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