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Posted Date: 01 Jun 2021 Posted By:: Shubham Jain Member Level: Silver Points: 3 (₹ 2)
2020 Indira Gandhi National Open University General B.Sc Life science 2020 TEE June session Ignou question paper of Lse-05 (Physiology) Question paper
Are you currently in the B.Sc. course of Ignou? Here is the previous year question paper of Lse - 05 (animal and plant physiology) of June session of 2020. Fell free to download it and boost up your preparation.
PART – 1 (ANIMAL PHYSIOLOGY)
Note: Attempt five questions in all. Question No. 1 is compulsory.
Q1. (a) Differentiate between the following: [1 each]
(i) Tidal Volume and Residual Volume
(ii) Guanotelism and Uricotelism
(b) Match the items given in column A with those in column B: [1 each]
Q2. (a) With the help of a well labelled diagram, describe a neuron. [3 marks]
(b) List any four types of glial cells of the neurons system. [2 marks]
Q3. (a) Discuss the actions of Estrogen. [4 marks]
(b) Name the four stages of estrous cycle. [1 mark]
Q4. Describe temperature regulation by heat production and heat loss in homeotherms. [5 marks]
Q5. How does, osmoregulation take place in marine vertebrates?
Q6. Write notes on any two of the following:
(a) Oxygen dissociation curve in humans
(b) Carbohydrate digestion
(c) Haemostatic (clotting) mechanisms
(d) Nephridia of worms
Q7. Describe, how gills of fish help in ventilation. [5 marks]
Q8. Describe the mechanism of muscle contraction.
PART – 2 (PLANT PHYSIOLOGY)
Note: Question No. 9 is compulsory. Attempt any four questions from question Nos. 10 to 14.
Q9. (a) Mark true or false for the following statements:
(i)Rhizobium-legume association during biological N2-fixation is a host-parasite relationship.
(ii) NAA is a natural auxin.
(iii) Zn is actively involved in the nitrogen metabolism of the plant.
(iv) Sorghum is an example of non-photo respiring C4 plant.
(b) Expand any two of the following:
(c) Define any two of the following: [1 each]
(i) Stomata! Index
(iii) Emerson-Enhancement Effect
10. Write short notes on any two of the following:
(a) Chemical Potential
(b) Red Drop
(c) Ethylene—a plant growth regulator
Q11. Explain Munch model for phloem transport.
12. (a) How do plants respond to water stress?
(b) How were phytochromes discovered?
13. (a) Explain the role of K-ions in stomatal opening and closing. [3 marks]
(b) Discuss the role of calcium or phosphorus as plant nutrient.
14. Explain briefly the role of the following scientists in the field of photosynthesis: [5 marks]
(i) C. B. Van Neil
(ii) S. Reuben and M. D. Kamen
(iii) Robert Hill
(iv) M. Calvin
(v) M. D. Hatch and C. R. Slack
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