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IGNOU MZO-03 (January 2026 – December 2026) Assignment Questions

1. a) Explain with help of a diagram fluid exchange across the capillary wall.
b) Explain RAAS (Renin Angiotensin Aldosterone System).

2.Differentiate between any three of the following pairs of terms:
i) Hypoxia and Hypercapnia
ii) Acclimatization and Acclimation
iii) Concerted (MWC) model and Sequential (KNF) model of allosteric enzyme
iv) Phase I and Phase II of glucose homeostasis

3.a) Describe the function of electric organs in fish.
b) Explain how absorption of fats differs from absorption of proteins and sugars.

4. Write short notes of the following:
i) Cardic output
ii) Membrane potential
iii) Concept of activation energy
iv) Role of respiratory complex II in electron transport chain

5. a) Describe the various methods of regulating enzyme activity.
b) Derive the Michaelis-Menten equation for enzyme catalysed reactions.

6. a) Briefly describe how glucose homeostasis is maintained in humans.
b) How does enzyme lower the activation energy? Discuss using suitable examples.

7. a) Explain how are enzyme inhibitors used as therapeutic drugs.
b) Discuss the evolution of electrosensory system and electric organs.

8. a) Discuss the regulation of activity of the enzyme fatty acid synthase.
b) Discuss the Lineweaver-Burk plot of enzyme kinetics and diagram.

9.a) Discuss the role of the Na+/K+ATPase pump in osmoregulation.
b) What are the five major respiratory conditions?

10.a) What is the significance of bile juice in the process of digestion?
b) Why are villi present in the small intestine and not in the stomach?

IGNOU MZO-03 (January 2025 – December 2025) Assignment Questions

1. a) What is Lineweaver Burk plot? Derive Lineweaver Burk equation from Michaelis-Menten equation.

b) Write the significance of Km and Vmax in enzyme activity.

2. Differentiate between any three of the following:

i) Competitive inhibition and Non-competitive inhibition

ii) Artery and vein.

iii) Active transport and passive transport

iv) Fed state and fasting State

3. a) What is the effect of pH and temperature on enzyme activity.

b) Write the characteristic features of the active site.

4. Write short notes of the following:

i) Well Fed state

ii) Allosteric enzymes

iii) Malpighian Tubules

iv) Filter Feeding

5. a) Briefly discuss the standard Gibbs energy change.

b) Write a brief account on the Nernst equation and its significance.

6. a) Explain why ATP is considered as energy currency.

b) Elaborate the role of the protein complex in the electron transport chain.

7. a) What is the role of the proton gradient in mitochondria? Discuss.

(b) Explain how lowering blood glucose levels affects the insulin/glucagon ratio.

8. a) Briefly discuss the respiratory response of human lungs to extreme conditions.

b) Discuss the muscle contraction with a well labelled diagram.

9. a) What is the metabolic fate of ATP in muscle cells.

b) How absorption of food takes place in the large intestine?

10. a) Briefly discuss the structure and function of F0-F1 ATP synthase

b) Give a brief account on redox potential using a suitable example.

MZO-03 Assignments Details

University	:	IGNOU (Indira Gandhi National Open University)
Title	:	Comparative Animal Physiology and Biochemistry
Language(s)	:	English
Code	:	MZO-03
Degree	:	MSCZOO
Subject	:	Zoology
Course	:	Core Courses (CC)
Author	:	Gullybaba.com Panel
Publisher	:	Gullybaba Publishing House Pvt. Ltd.

IGNOU MZO-03 (Jan 26 - Dec 26, Jan 25 - Dec 25) - Solved Assignment

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