NSO Level 1- Science Olympiad (SOF) Class 12: Questions 8 - 10 of 60

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Question number: 8

» Biology » Biology in Human Welfare

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MCQ▾

Question

When does a person experience recurring chill and fever while suffering from a disease caused by Plasmodium?

Choices

Choice (4)Response

a.

When in spleen, sporozoites released from RBC are killed rapidly and broken.

b.

When maximum growth reached by trophozoites and certain toxins are given out.

c.

When the parasite after rapid multiplication inside RBC ruptures them and releasing stage that will enter fresh RBC.

d.

When WBCs destroy microgametocytes and megagametocytes

Question number: 9

» Biology » Biology in Human Welfare

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MCQ▾

Question

A person meet with an accident wherein due to the injury the chordae tendinae of the tricuspid valve of the human heart gets partially non-functional then what will be the sudden effect?

Choices

Choice (4)Response

a.

Blood flow in pulmonary artery will be decreased

b.

Pacemaker will stop working

c.

Blood flow in aorta will be slowed down

d.

Blood will flow back to left atrium

Question number: 10

» Biology » Genetics and Evolution

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Assertion-Reason▾

Question

Assertion (Ꭺ)

In eukaryotic cells, RNA which is produced during transcription cannot be directly used for translation.

Reason (Ꭱ)

Phenomenon of RNA splicing helps to remove exons.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is false but Ꭱ is true

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Ꭺ is true but Ꭱ is false

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