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Bio0113:Plant Physiology Question Paper

Bio0113:Plant Physiology

Course:Diploma In Agriculture

Institution: Meru University Of Science And Technology question papers

Exam Year:2012

QUESTION ONE – (30 MARKS)
(a) Explain the Crussulacean Acid Metabolism (CAM) carbon dioxide fixation. (5 Marks) (b) State the physiological plant disorder due to nitrogen deficiency. (5 Marks) (c) Discuss the role of Ethylene in plants. (10 Marks) (d) State the functions of the following plant organelles: (i) Epidermis (ii) Cell membrane (iii) Mitochondria (iv) Nucleus (6 Marks) (e) Distinguish between differentiation and specialization of plant cells in growth and development. (4 Marks)
QUESTION TWO – (15 MARKS)
(a) Describe the environmental factors that affect photosynthesis of higher plants. (10 Marks) (b) State the differences between C3 and C4 plants. (5 Marks)
QUESTION THREE – (15 MARKS)
(a) Explain the physiological effect of auxins as a plant growth regulator substances. (10 Marks) (b) Describe the effect of abscisic acid on moisture stress. (5 Marks)
QUESTION FOUR – (15 MARKS)
(a) Describe the effect of water stress in plant. (10 Marks) (b) State the plants adaptation to water stress. (10 Marks)
QUESTION FOUR – (15 MARKS)
(a) Explain with the aid of a diagram how the pressure chamber method is used to measure water potential in plant cells. (10 Marks) (b) Outline the water movement from the soil to the atmosphere. (5 Marks)

Bio0113:Plant Physiology Question Paper

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