BZYCT-135 PHYSIOLOGY AND BIOCHEMISTRY in English Solved Assignment 2020-2021

BZYCT-135 PHYSIOLOGY AND BIOCHEMISTRY

Solved Assignment 2020-2021

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ASSIGNMENT
PHYSIOLOGY AND BIOCHEMISTRY
Course Code: BZYCT-131
Assignment Code: BZYCT-135/TMA/2020-2021
Maximum Marks: 100

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Note: Attempt all questions. The marks for each question are indicated against it.
Part-A Maximum Marks: 50
1. i) a) Which nutrient of among following is absorbed mainly in the large
intestine?
(i) glucose
(ii) amino acid
(iii) sodium
(iv) water
b) Why are villi present in the small intestine and not in the stomach?
ii) What are the end-products of food that can be absorbed by the body?
Explain how absorption of fats differs from absorption of proteins and
sugars.
iii) Why does diffusion alone suffice to supply oxygen in both protists
(protozoans) and flatworms?
iv) Write a formula representing the reaction between haemoglobin and oxygen.

2. i) a) State the differences between blood and plasma.
b) How do intercellular fluids differ from intracellular fluids?
ii) Explain with the help of a flow chart the cascade of events occurring in
secondary haemostasis.

3. i) Describe with the help of a diagram the cyclic function of osmoregulation in
Amoeba.
ii) Draw a simple flow chart and explain how kidney function is hormonally
regulated.
(2)
(7)
4. i) a) In a relaxed muscle fibre, the myosin binding site on action is blocked
by
i) titin
ii) troponin
iii) myoglobin
iv) tropomyosin
(1)
4
b) According to the sliding filament model, binding sites on action open
when ……………….. .
a) creatine phosphate levels rise
b) ATP levels rise
c) acetylcholine levels rise
d) calcium ion levels rise
ii) Write down the steps that take place when an action potential arrives in a
presynaptic axon terminal and the generation of another action potential in
the post synaptic neuron.
(1)
(8)
5. i) Compare the action of steroid and peptide hormones with respect to:
a) structure
b) receptor
c) mechanism of action.
ii) Write the function of following in male reproductive system.
a) Seminiferous tubules
b) Leyding cells
c) Epidydmis
d) Androgen
iii) With the help of a flow diagram explain the function of female hormones in
humans. How is it regulated?
(3)
(2)
(5)
Part-B Maximum Marks: 50
6. i) Describe the proteins in terms of levels of organization in primary,
secondary, tertiary and quaternary structures.
ii) What is activation energy?
iii) Explain briefly the functioning of allosteric enzymes.
(5)
(2)
(3)
7. i) How a value for Km can be obtained from the vo vs S graph when vo = 1/2
Vmax?
ii) Indicate whether the following statements are true (T) or false (F):
a) Vitamins are inorganic compounds.
b) TPP participates in the carboxylation reactions.
c) Thiazole ring is present in the niacin vitamin.
iii) Fill in the blanks:
a) EDRF is ………………….. .
b) Semi-ubiquinone is present in ………………….. .
8. i) Match the following:
Column A Column B
a) Proteins i) lipid peroxidation
(3)
5
b) Lipids ii) thymine dimmers
c) Nucleic acids iii) oxo acids
ii) Briefly explain the regulation of glycolysis. Why is step 3 and not step 1 of
glycolysis the major control point? (7)
9. i) Indicate whether the phosphorylated form of the following enzymes is active
or inactive?
a) Glycogen phosphorylase
b) Glycogen synthase
c) Protein phosphatase
ii) Discuss the function of electron transport complex- I.

10. i) Explain the processes of activation and transport of fatty acids to
mitochondrial matrix for their oxidation.
ii) Write a note on amino acid biosynthesis.

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BZYCT 135, BZYCT135, BZYCT-135