Biomolecules & Human Physiology- Biochemistry-BSC-Nagpur-Summer-2019

Bachelor of Science (B.Sc.) Semester—I Examination
BIO-CHEMISTRY (Biomolecules & Human Physiology)

Optional Paper—1
Time : 3 Hours
Maximum Marks : 50

N.B. :— (1) All questions are compulsory and carry equal marks.
(2) Draw well labelled diagram wherever necessary.

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1. What are monosaccharides ? Describe the reaction of monosaccharides with :

(a) Phenyl hydrazine

(b) Na/Hg

(c) Concentrated HNO3. [10M]

OR

Briefly describe the structure, similarities and differences between starch, glycogen and cellulose.
[10M]

2. (a) Describe in detail different types of fatty acids. [5M]

(b) What are glycerophospholipids ? Describe the structure of phosphatidylcholine. [5M]

OR

Write notes on :

(a) Halogenation of fats [2½M]

(b) Hydrolysis of triglycerides [2½M]

(c) Hydrogenation of fats [2½M]

(d) Essential fatty acids. [2½M]

3. Describe in detail the sliding mechanism of muscle contraction. [10M]

OR

Describe in detail digestion of carbohydrates in the alimentary canal. [10M]

4. Describe briefly :

(a) Fluid Mosaic Model for membrane structure. [5M]

(b) Facilitated diffusion with example. [5M]

OR

Describe in detail active transport with suitable example. [10M]

5. Answer any ten of the following :

(i) What are anomers ? [1M]

(ii) Name the glycosidic linkage present in sucrose. [1M]

(iii) Name one trisaccharide. [1M]

(iv) Write the chemical structure of palmitoleic acid. [1M]

(v) What is meant by saponification number of fat ? [1M]

(vi) Give one difference between fat and oil. [1M]

(vii) Name the neurotransmitter in neuro-muscular junction. [1M]

(viii) Give any one example of endopeptidase of digestive system. [1M]

(ix) Name any one lipolytic enzyme. [1M]

(x) Define symport. [1M]

(xi) What is meant by simple diffusion ? [1M]

(xii) Give one function of the cell membrane. [1M]

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