IGCSE Biology Paper-2: Specimen Questions with Answers 28 - 30 of 103

Question number: 28

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MCQ▾

Question

What is the largest salivary gland?

Choices

Choice (4) Response

a.

Brunner’s gland

b.

Liver

c.

Parotids gland

d.

Henley’s gland

Answer

c.

Explanation

The parotid gland is a major salivary gland. In human beings, the two parotid glands occur under the mouth and in front of both ears.

Question number: 29

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MCQ▾

Question

Thymine in DNA is always paired with

Choices

Choice (4) Response

a.

Adenine

b.

Thymine

c.

Guanine

d.

Cytosine

Answer

a.

Explanation

Reason behind it is chemical structure of each base. Adenine and Thymine establish two hydrogen bonds between them. Guanine and Cytosine establish three hydrogen bonds between them. so A and T are always paired and G and C are always paired.

Question number: 30

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Match List-Ⅰ List-Ⅱ▾

Question

Match list I and list II

List-Ⅰ (Plants) List-Ⅱ (Indication Of Climate)

(A)

Xerophytes

(i)

Heavy rain inwinter and low in summer

(B)

Sclerophytes

(ii)

Heavy rain in summer and winter

(C)

Evergreen Forest

(iii)

Low or no rain fall

(D)

Grassland

(iv)

Heavy rain in summer and low in winter

Choices

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

a.

  • (iii)
  • (i)
  • (ii)
  • (iv)

b.

  • (ii)
  • (i)
  • (iii)
  • (iv)

c.

  • (ii)
  • (i)
  • (iv)
  • (iii)

d.

  • (ii)
  • (iv)
  • (iii)
  • (i)

Answer

a.

Explanation

Evergreen forests present in the equatorial region where heavy rain occur in both summer and winter. Grassland develop in areas with 25 - 100 cm annual precipitation and sclerophytes are those areas where heavy rain occur in winter and low rainfall at summer. Xerophytes are also called as desert. Where low rainfall occur.