IGCSE Biology Paper-2: Specimen Questions with Answers 23 - 25 of 203

Question 23

Question MCQ▾

the diagram shows type of tooth. Which type of tooth is it?

The Diagram Shows Type of Tooth

Choices

Choice (4)

a.

Incisors

b.

Molars

c.

Premolars

d.

Canines

Edit

Answer

c.

Explanation

The premolars have a flat biting surface. Their function is to tear and crush food. They are unique to the permanent dentition with eight premolars in human beings.

Question 24

Question MCQ▾

Plant cells uses chlorophyll in the process of

Choices

Choice (4)

a.

Development

b.

Nutrition

c.

Photosynthesis

d.

Reproduction

Edit

Answer

c.

Explanation

Photosynthesis is a process in which energy harvesting reaction of chlorophyll and reduction of carbon di oxide is occur. In photosynthesis, light energy is converted into chemical energy.

Question 25

Question MCQ▾

What is not a characteristic of an enzyme?

Choices

Choice (4)

a.

Enzymes are proteins

b.

Enzymes cannot be coagulated by alcohol

c.

Enzymes have an optimum pH range within which the enzymes function is at its peak.

d.

Enzymes show varying degree of specificities.

Edit

Answer

b.

Explanation

Enzymes have great catalytic power and like the proteins, alcohol, heat, concentrated acids and alkaline reagents can coagulate enzymes.