IGCSE Biology Paper-2: Specimen Questions with Answers 42 - 45 of 203

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Question 42

Question

MCQ▾

In given diagram of chromosomes what is the part X?

Above Diagram Shows Chromosome Structure

Choices

Choice (4)

a.

Secondary construction

b.

Choromocentre

c.

Centromere

d.

None of the above

Answer

c.

Explanation

The centromere is the part of a chromosome that links sister chromatids, during the process of mitosis

Question 43

Question

MCQ▾

Which is the example of biodegradable material?

Choices

Choice (4)

a.

Plastic

b.

Garbage

c.

Rubbish

d.

Oil

Answer

b.

Explanation

Biodegradable materials are those materials which can be easily degrade by microorganisms and its example is garbage or eatable waste

Question 44

Question

MCQ▾

Which part is anther?

Image Shows Parts of the Flower

Choices

Choice (4)

a.

Part C

b.

Part D

c.

Part B

d.

Part A

Answer

a.

Explanation

Anther is the part of a stamen that produces and contains pollen and is usually borne on a stalk

Question 45

Question

Match List-Ⅰ List-Ⅱ▾

Match the column I and II

List-Ⅰ (I Disease)List-Ⅱ (II Causing Organism)
(A)

Gonorrhea

(i)

Neisseria

(B)

Diphtheria

(ii)

Vibrio

(C)

Cholera

(iii)

Clostridium

(D)

Leprosy

(iv)

Corynebacterium

(E)

Tetanus

(v)

Mycobacterium

Choices

Choice (4)
  • (A)
  • (B)
  • (C)
  • (D)
  • (E)

a.

  • (i)
  • (v)
  • (ii)
  • (iv)
  • (iii)

b.

  • (i)
  • (iv)
  • (ii)
  • (v)
  • (iii)

c.

  • (iv)
  • (i)
  • (ii)
  • (v)
  • (iii)

d.

  • (v)
  • (i)
  • (iii)
  • (ii)
  • (iv)

Answer

b.

Explanation

Diphtheria is caused by the corynebacterium bacterium. Its most commonly spread through person-to-person contact. A bacterium called Vibrio cholerae causes cholera infection.

Tetanus is a serious infection caused by Clostridium tetani bacteria, which produce a toxin that affects the brain and nervous system.

Leprosy is caused mainly by Mycobacterium leprae, a rod-shaped bacillus.

Gonorrhea is caused by Neisseria gonorrhoeae, a bacterium that can grow and multiply easily in mucus membranes of the body.

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