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Bota 313: Plant Physiology Question Paper

Bota 313: Plant Physiology

Course:Bachelor Of Education Science

Institution: Kabarak University question papers

Exam Year:2012

KABARAK
UNIVERSITY

UNIVERSITY EXAMINATIONS
2011/2012 ACADEMIC YEAR
FOR THE DEGREE OF BACHELOR OF EDUCATION SCIENCE

BOTA 313: PLANT PHYSIOLOGY
DAY: THURSDAY

DATE: 12/04/2012
TIME: 8.00 – 10.00 A.M.
STREAM: SESS 5&6
INSTRUCTIONS:
Answer ALL the questions from SECTION A and any TWO questions from
SECTION B

SECTION A (40 MARKS)
1. (a) Define the following terms:
(i)
Peptide bond
(ii)
Acsessory pigments
(iii)
Glycolipids
(iv)
Co-enzyme

(4 mks)

(b) In CAM plants, where are PEP carboxylase and RUBP carboxylase located?

(6 mks)

2. (a) What factors influence the rate of transpiration?

(4 mks)
(b) In CAM plants are the stomata open at night or during the day and how does

this affect the amount of water lost when stomata are open?
(6 mks)

3. (a) What chemical is the carbon dioxide acceptor in C3 cycle

(2 mks)

(b) What enzyme catalysis this reaction and what is the product?

(4 mks)

(c) Discuss the advantages of C4 carbon fixation over C3 cycle.
(4 mks)

4. (a) Differentiate between intracellular and extracellular enzymes.
(2 mks)

(b) How does an enzyme lower the energy of activation?
(2 mks)
Page 1 of 2

SECTION B (30 Marks)
5. By use of a well labeled diagram describe cyclic and non-cyclic photophosporylation.

(15 mks)

6. Compare and contrast C3, C4 and CAM carbon fixation including a statement of their

ecological distribution.

(15 mks)

7. The process of respiration involves two sets of reactions, glycolysis and krebs cycle.

Describe what happens during these reactions leading to the complete breakdown of

glucose.

(15 mks)

Bota 313: Plant Physiology Question Paper

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