CIE Biology Paper-1: Specimen Questions 50 - 52 of 109

Question number: 50

MCQ▾

Question

Why water is important in photosynthesis?

Choices

Choice (4) Response
a.

It provide oxygen

b.

It provide energy

c.

It the source of hydrogen for the sugars created through photosynthesis

d.

It is a catalyst

Answer

c.

Explanation

Water is important for photosynthesis because it the source of hydrogen for the sugars created by photosynthesis. Sugars created by photosynthesis have 6 carbon atoms, 12 hydrogen atoms and 6 oxygen atoms per molecule.

Question number: 51

MCQ▾

Question

What is a compound containing Carbon, Hydrogen, oxygen, and Nitrogen, and is 10 - 30 % of cell bulk?

Choices

Choice (4) Response
a.

glucose

b.

starch

c.

Fructose

d.

protein

Answer

d.

Explanation

Protein-chemical structure of protein is-

Find out graph of Protein-chemical structure

Find out graph of Protein-chemical structure

shows grapg of compound containing Carbon, Hydrogen, oxygen, and Nitrogen

Question number: 52

MCQ▾

Question

What is IUD’S method for family planning?

Choices

Choice (4) Response
a.

Which prevent the woman’s ovary from releasing an egg, make it harder for the sperm to reach the egg

b.

Which help a woman know when she is fertile, so that she can avoid having sex at that time

c.

Which prevent the man’s sperm from fertilizing the woman’s egg.

d.

Prevent pregnancy by keeping the sperm from reaching the egg

Answer

c.

Explanation

An IUD is a small, T-shaped plastic device that is wrapped in copper and it is made up of hormones. The IUD is inserted into uterus by doctor. A plastic string tied to the end of the IUD hangs down by the cervix into the vagina. The string is also used by doctor to remove the IUD.

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