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?
Choices
Choice (4) | |
---|---|
a. | Incisors |
b. | Molars |
c. | Premolars |
d. | Canines |
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 |
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. |
Answer
b.Explanation
Enzymes have great catalytic power and like the proteins, alcohol, heat, concentrated acids and alkaline reagents can coagulate enzymes.