Nalanda Open University
Annual Examination 2017
B.Sc. Botany (Honours), Part-III
Paper-V (Physiology and Biochemistry)
Time: 3.00 Hrs. Full Marks: 80
Answer any five questions. Questions No. 1 is compulsory.
All questions carry equal marks.
1. Multiple choice questions:
Plants require Fe and Mg for:
Synthesis of chlorophyll
Opening and closing of stomata
Translocation of Carbohydrates None of these.
Plants absorb the element nitrogen in the form:
Nitrogen gas
Nitrites
Nitrates
Nitric acid
In kreb's cycle, a six carbon compound is formed by the combination
of Acetyl Co A and
Citric acid Malic acid
Oxaloacetic acid Succinic acid
The Photosynthetic activity of chlorophyll is maximum in
Violet and Red Light Violet Light
Blue light Red Light
The first kinetin isolated by muller was from
Coconut endosperm
Maize grains
Herring sperm DNA
Wheat grains.
Elongation of dwarf of plants is achieved by treatment with
Auxin Zeatin
Cytokinin Cabberrelin
Plasmolysis occurs due to
Absorption Osmosis
Endoosmosis Exoosmosis
(viii) Transpiration is least in
High atmospheric humidity High temperature
High wind velocity None of these
2. Describe the role of auxins in Physiology of plants.
3. Describe the role of micro nutrient and macro-nutrients in plants.
4. Describe the mechanism of opening and closing of stomata.
5. What is anaerobic respiration? Describe, glycolytre pathway in detail.
6. Describe different stages of Nitrogen cycle.
7. Show the difference between C3 and C4 cycle with suitable example.
8. Write short notes on any two of the following:
Phytochrome system
Difference between cyclic and non-cyclic photophospho relation.
Trace elements and its role
9. Give an account of the mechanism of geotropism
10. Write notes on any Four of the following
Imbibition
Diffusion
Plasmolysis
Carrier concept of ion uptake in plant cells.