IGCSE Biology Paper-3: Specimen Questions with Answers 108 - 111 of 230

Question number: 108

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Short Answer Question▾

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Name two examples of monosaccharide, disaccharide, and polysaccharide

Explanation

Monosaccharide- Glucose, Fructose

Disaccharide- Maltose, Sucrose

Polysaccharide- Starch and Fiber

Question number: 109

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MCQ▾

Question

Name the organ, which is the most sensitive to progesterone?

Choices

Choice (4) Response

a.

Brain

b.

Uterus

c.

Lungs

d.

Heart

Answer

b.

Explanation

Progesterone enhance uterus sensitivity, which can remain for many days until sensitivity is completed by estrogen.

Passage

Figure below shows the nitrogen cycle.

image of Nitrogen Cycle.

Image of Nitrogen Cycle.

Label the processes occur in nitrogen cycle in biotic and abiotic environment

Question number: 110 (1 of 2 Based on Passage) Show Passage

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Short Answer Question▾

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Label one arrow in each case to show where each of the following processes occur in the nitrogen cycle.

(i) Nitrification – using the letter N

(ii) Ammonification – using the letter A

(iii) Denitrification – using the letter D

(iv) Nitrogen fixation – using the letter NF

Explanation

shows Image of Nitrogen Cycle.

Shows Image of Nitrogen Cycle.

Label the processes occur in nitrogen cycle in biotic and abiotic environment

Question number: 111 (2 of 2 Based on Passage) Show Passage

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Short Answer Question▾

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Describe effects of nitrogen cycle in aquatic Ecosystem.

Explanation

Ammonia is toxic for fishes and invertebrates. If ammonia increase in blood/tissues then blood pH also enhance. It can causes imbalance in enzyme activity and decrease membrane stability. High level of ammonia reduce oxygen transport and gill damage.