21. Which of the following statements is correct?
A
Some tranquilizers function by inhibiting the enzymes which catalyse the degradation of noradrenaline.
B
Tranquilizers are narcotic drugs.
C
Tranquilizers are chemical compounds that do not affect the message transfer from nerve to receptor.
D
Tranquilizers are chemical compounds that can relieve pain and fever.
Answer :
Some tranquilizers function by inhibiting the enzymes which catalyse the degradation of noradrenaline.
22. Which of the following is scientific explanation of depression?
A
An increased level of sugar in the blood leads to depression.
B
Low levels of noradrenaline, a neurotransmitter in the blood leads to depression.
C
Release of extra gastric juices in the stomach leads to depression.
D
Sleep inducing drugs lead to depression.
Answer :
Low levels of noradrenaline, a neurotransmitter in the blood leads to depression.
23. Which of the following statements is not true about enzyme inhibitors?
A
Inhibit the catalytic activity of the enzyme.
B
Prevent the binding of substrate.
C
Generally a strong covalent bond is formed between an inhibitor and an enzyme.
D
Inhibitors can be competitive or non-competitive.
Answer :
Generally a strong covalent bond is formed between an inhibitor and an enzyme.
24. Select the incorrect statement.
A
Equanil is used to control depression and hypertension.
B
Mifepristone is a synthetic steroid used as “morning after pill”.
C
0.2 per cent solution of phenol is an antiseptic while its 1.0 per cent solution is a disinfectant.
D
A drug which kills the organism in the body is called bacteriostatic.
Answer :
A drug which kills the organism in the body is called bacteriostatic.
25. The main constituents of dettol are
A
chloramphenicol + glycerol
B
$$2{\text{ - }}3\% $$ solution of iodine in alcohol
C
$$0.2\% $$ solution of phenol
D
chloroxylenol and terpineol
Answer :
chloroxylenol and terpineol
26. Which of the following will not act as a tranquilizer?
A
Equanil
B
Analgin
C
Meprobamate
D
Chlordiazepoxide
Answer :
Analgin
27.
Antimicrobial drugs include
(i) antiseptics
(ii) antibiotics
(iii) disinfectants
A
only (i) and (ii)
B
only (i) and (iii)
C
only (ii) and (iii)
D
all of these
Answer :
all of these
28. Which artificial sweetener contains chlorine ?
A
Sucralose
B
Alitame
C
Aspartame
D
Saccharin
Answer :
Sucralose
is 
sucralose. 29. Antiseptics and disinfectants either kill or prevent growth of microorganisms. Identify which of the following is not true
A
0.2% solution of phenol is an antiseptic while 1% solution acts as a disinfectant
B
Chlorine and iodine are used as strong disinfectants
C
Dilute solutions of boric acid and hydrogen, peroxide are strong antiseptics
D
Disinfectants harm the living tissues
Answer :
Dilute solutions of boric acid and hydrogen, peroxide are strong antiseptics
30. Which of the following is an analgesic?
A
Penicillin
B
Streptomycin
C
Chloromycetin
D
Novalgin
Answer :
Novalgin