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11
MCQ (Single Correct Answer)
Glycogen is a homopolymer made of
A
glucose units
B
galactose units
C
ribose units
D
amino acids
12
MCQ (Single Correct Answer)
The number of 'ends' in a glycogen molecule would be
A
Equal to the number of branches plus one
B
Equal to the number of branch points
C
One
D
Two, one on the left side and another on the right side
13
MCQ (Single Correct Answer)
The primary structure of a protein molecule has
A
two ends
B
one end
C
  three ends
D
no ends
14
MCQ (Single Correct Answer)
Which of the following reactions is not enzyme mediated in biological system?
A
Dissolving $\mathrm{CO}_2$ in water
B
Unwinding the two strands of DNA
C
Hydrolysis of sucrose
D
Formation of peptide bond
15
 

Medicines are either man made (i.e., synthetic) or obtained from living organisms like plants, bacteria, animals, etc., and hence, the latter are called natural products. Sometimes, natural products are chemically altered by man to reduce toxicity or side effects. Write against each of the following whether they were initially obtained as a natural product or as a synthetic chemical.

(a) Penicillin (b) Sulphonamide (c) Vitamin-C (d) Growth hormone

Explanation

(a) Penicillin is a group of antibiotics derived from fungi Penicillium and was initially used as a natural product.

(b) Sulphonamide is a synthetic chemical. It is an antimirobial agent is the basis of several groups of drugs.

(c) Vitamin-C or L-ascorbic acid or ascorbate is a natural product and an essential nutrient for humans. It is present in citrus fruits.

(d) Growth hormone (GH or HGH) also known as somatotropin or somatropin is a peptide hormone occurring naturally in the body. It stimulates growth.