IGCSE Biology Paper-2: Specimen Questions with Answers 26 - 29 of 203

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Question 26

Question

MCQ▾

Figure shows a structure of human eye. Which part is cornea?

The Figure Shows a Structure of Human Eye

Choices

Choice (4)

a.

Part D

b.

Part C

c.

Part B

d.

Part A

Answer

d.

Explanation

The cornea is the transparent front portion of the eye that protects the iris, pupil, and anterior chamber of eye. Cornea is a highly organized group of cells and proteins.

Question 27

Question

MCQ▾

The diagram shows a structure of heart . Which part is pulmonary artery

Image is Related to Structure of Human Heart

Choices

Choice (4)

a.

Part A

b.

Part B

c.

Part C

d.

Part D

Answer

c.

Explanation

The pulmonary artery is the part of heart, which carries deoxygenated blood from the heart to the lungs.

Question 28

Question

MCQ▾

What is the largest salivary gland?

Choices

Choice (4)

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 29

Question

MCQ▾

Thymine in DNA is always paired with

Choices

Choice (4)

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.

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