CIE Biology Paper-1: Specimen Questions 25 - 28 of 109

Passage

Diagram of Nitrogen cycle

Diagram of Nitrogen cycle

Finding v in nitrogen cycle

Question number: 25 (1 of 2 Based on Passage) Show Passage

MCQ▾

Question

This the diagram of nitrogen cycle. What is v?

Choices

Choice (4) Response
a.

Ammonification

b.

Denitification

c.

Nitrification

d.

Nitrogen fixation

Answer

d.

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.

Question number: 26 (2 of 2 Based on Passage) Show Passage

MCQ▾

Question

In above diagram of nitrogen cycle conversion of ammonia to nitrite is done in the presence of which bacteria?

Choices

Choice (4) Response
a.

Nitrosamonas bacteria

b.

Rhizobium

c.

Nitrobacteria

d. All of the above

Answer

a.

Explanation

Nitrosomonas is useful in phytoremediation. They are important in the N2 cycle by increasing the availability of nitrogen to plants while limiting CO2fixation. Such type of bacteria found in soil, freshwater, and on building shells, particularly in parts that contains high of nitrogen substances.

Question number: 27

MCQ▾

Question

In above diagram what is producer?

Diagram of grazing food chain

Diagram of grazing food chain

Finding producer or autotrophs in diagram

Choices

Choice (4) Response
a.

Chicken

b.

Boy

c.

Bug

d.

Plant

Answer

d.

Explanation

producers make their own food with the help of sun light. Example green plants and photosynthetic bacteria.

Question number: 28

MCQ▾

Question

The diagram shows water cycle. In which state it is in vapor form?

Diagram of hydrological cycle

Diagram of hydrological cycle

Finding state of vapor form

Choices

Choice (4) Response
a.

T

b.

R

c.

Q

d.

S

Answer

c.

Explanation

Q is the process of evaporation in which water changes from a liquid to a vapor.

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