IGCSE Biology Paper-2: Specimen Questions with Answers 80 - 82 of 203

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Question 80

Question

MCQ▾

What is the general formula of carbohydrate-?

Choices

Choice (4)

a.

b.

c.

d.

Answer

a.

Explanation

A carbohydrate is a biological molecule made up of carbon, hydrogen and oxygen atoms, in other words, with the empirical formula Cm (H2O) n (where m could be different from n) .

Question 81

Question

MCQ▾

Cell walls are present in some cells. Match the correct statement for cell walls

Choices

Choice (4)

a.

In animals, cell wall are present outside the cell membrane and in plants, cell wall is absent

b.

In animal cell wall absent and in plants cell wall is present outside the cell membrane

c.

In animal cell wall absent and in plants cell wall is present inside the cell membrane

d.

In animals cell wall absent and in plants cell wall is absent

Answer

b.

Explanation

The cell wall is a tough, flexible and layer that surrounds mainly plant cells. It surrounds the cell membrane and provides these cells with structural support and protection. Such type of cell walls are not present in animal cell.

Question 82

Question

MCQ▾

Which is not an example of natural disaster?

Choices

Choice (4)

a.

Earthquake

b.

Flood

c.

War

d.

Volcanic eruption

Answer

c.

Explanation

Anthropogenic hazards or man-made disaster are those problems caused directly or indirectly by human action or inaction. War is a conflict between relatively large groups of people, which involves physical force inflicted by the use of weapons.

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