Nalanda Open University
Annual Examination 2016
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
Ions uptake is called active because
Ions are active Ions move freely
Ions move positively Energy is spent
The Process of transpiration helps in
Absorption of CO2 from atmosphere
upward conduction of water
Opening of stomata
Absorption of O2 from atmosphere
In C4 pathway of CO2 fixation the first stable product is
Pyruvic acid Phosphoenol pyruvic acid
Phosphoglyceric acid None of these
Krebs cycle takes place in
ER Mitochondria
Ribosome Chloroplast
One of the following is not a product in Calvin cycle of photosyn thesis:
Ribose Phosphate
Dihydroxy acetone phosphate
Xylulose Phosphate
Oxaloacetic acid
Pyruvic acid before combining with oxaloacetic acid of Krebs cycle
change into:
Cis-aconitic acid Acetoacetic acid
Lactic acid Acetyl CoA
Fat can be synthesized from carbohydrate via
Qxalosuccinic acid Malic acid
Citric acid Acetyl CoA
(viii) Free living N2 fixing are found in
Soil Air
Root nodule None of these
2. Give an account of fluid mosaic model of plasmamembrane.
3. Describe the process of absorption of water in land plants.
4. Describe C3 cycle of Co2 fixation in photosynthesis.
5. Give details of glycolysis.
6. What are growth hormones? Describe the role of gibberellins in the
physiology of plants.
7. Describe the role of Nitrogen, Phosphorus, Potassium and Zinc in the
Physiology of plants..
8. Give an account of Nitrogen cycle.
9. Define tropic movement. Describe the mecharism of phototropism.
10. Write notes on any Two of the following
Role of cytokinins in plant physiology
Non-cyclic photophosphorylation
Electron Transport system
Osmosis