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Byju's Answer
Standard XII
Biology
Active Immunity
Active immuni...
Question

Active immunity is elicited by exposure to
i. Toxoids
ii. Subclinical infection
iii. Antitoxins
iv. Immunoglobulins
v. Antigen exposure


A
ii, v
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B
ii, iv, v
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C
i, ii, v
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D
ii, iii, v
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Solution

The correct option is C i, ii, v

Active immunity can be induced by any substance that actively stimulates the immune system to produce antibody. Vaccines, toxoids, infection or antigen exposure can induce active immunity

Antitoxins and immunoglobulins are, e.g. of Passive immunity.


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Similar questions
Q. Active immunity is produced in one’s body by exposure to:
i. Toxoids
ii. Subclinical infection
iii. Antitoxins
iv. Immunoglobulins
v. Antigen

Q. Differentiate between the following:
(i) Antigen and Antibody
(ii) Antiseptic and Antibiotics
(iii) Serum and Plasma
(iv) Toxins and Antitoxins
(v) Vaccination and Sterilization
(vi) Disinfectant and Antiseptic
(vii) Active immunity and Passive immunity
(viii) Acquired disease and Congenital disease
Q.

Match the following


  1. (1)–(iii), (viii); (2)–(i), (iv); (3)–(ii), (vi); (4)-(ii),(v); (5)–(iii), (iv); (6)–(i) (vii); (7)–(ii), (iv)

  2. (1)–(ii), (vii); (2)–(i), (iv); (3)–(ii), (vi); (4)-(ii),(v); (5)–(ii), (iv); (6)–(i) (viii); (7)–(iii), (iv)

  3. (1)–(ii), (vii); (2)–(i), (vii); (3)–(iii), (iv); (4)-(i),(v); (5)–(ii), (vi); (6)–(i) (vi); (7)–(i), (iv)

  4. (1)–(ii), (vii); (2)–(i), (iv); (3)–(ii), (vi); (4)-(ii),(iv); (5)–(i), (viii); (6)–(iii) (iv); (7)–(iii), (vii)

Q. Functions of plant growth promoters and plant growth inhibitors are given here in a jumbled up manner. Select the option that torrettly segregates these functions.
(i)Cell division(ii)Cell enlargement
(iii)Pattern formation(iv)Tropic growth
(v)Flowering(vi)Fruiting
(vii)Seed germination(viii)Response to wounding
(ix)Response to stresses
of biotic and abiotic origin
(x)Dormancy

Functions of
growth promoters		Functions of
growth inhibitors
(a)(i), (ii), (vii), (ix)(iii), (iv), (v), (vi), (viii), (x)
(b)(viii), (ix), (x)(i), (ii), (iii), (iv), (v), (vi), (vii)
(c)(i), (ii), (iii), (iv), (v), (vi), (vii)(viii), (ix), (x)
(d)(i), (ii), (iii), (iv), (v), (vi), (vii), (ix), (x)(viii)
Q.

Given below is a randomly arranged list of events that occur at the neuromuscular junction to trigger muscle contraction.Which of the following gives the correct sequence of these steps?

(i) Acetylcholine binds to the receptor sites on sarcolemma

(ii) Nerve impulse

(iii) Release of Ca+2 from sarcoplasmic reticulum

(iv) The neurotransmitter acetylcholine is released

(v) Sarcomere shortens

(vi) Acetylcholine diffuses across the synaptic cleft

(vii) Spread of impulses over sarcolemma on T-tubules


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