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)
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