CIE Biology Paper-1: Specimen Questions 15 - 17 of 109

Question number: 15

MCQ▾

Question

The diagram shows four different animals, in which are Invertebrates?

Select which of the following are invertebrates

Select which of the following are invertebrates

Find the invertebrates among the following ones

Choices

Choice (4) Response
a.

3

b.

1

c.

4

d.

2

Answer

d.

Explanation

Invertebrates are animals that don’t have a backbone or spinal column and star fish is the example of invertebrates.

While reptiles, birds and coral snake are the examples of vertebrates.

Question number: 16

MCQ▾

Question

Gastric juice mainly contains?

Choices

Choice (4) Response
a.

Serum

b.

Bile

c.

Pancreatic enzyme

d.

Hydrochloric acid and pepsin

Answer

d.

Explanation

Hydrochloric acid and pepsin is present in the gastric juice. These help in breaking down complexes and aid in digestion.

Question number: 17

MCQ▾

Question

It shows nitrogen cycle. Which are missing process in the diagram? Find a and b.

Diagram of Nitrogen cycle – Find a and b

Diagram of Nitrogen cycle – Find a and b

Finding a and b in the system above

Choices

Choice (4) Response
a.

a- Absorption b- nitrification

b.

a-nitrite oxidation b- absorption

c.

a- Nitrogen fixation b- nitrification

d.

a- Ammonium oxidation b- nitrogen fixation

Answer

c.

Explanation

Nitrogen Fixation-Living organisms do not use nitrogen gas in that form so it is necessary to convert into different compound. The process of converting atmospheric nitrogen into biologically available nitrogen is called nitrogen fixation.

Nitrification: Nitrification is the process that converts ammonia to nitrite. .

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