IGCSE Biology Paper-3: Specimen Questions with Answers 59 - 61 of 230

Question number: 59

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MCQ▾

Question

Mitochondria is not involve in-

Choices

Choice (4) Response

a.

Fatty acid biosynthesis

b.

ATP production

c.

Apoptosis

d.

Tricarboxylic acid cycle

Answer

a.

Explanation

Mitochondria is the part of cell which is involved in, ATP production, Tricarboxylic acid cycle, Apoptosis except the synthesis of fatty acid.

Question number: 60

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Short Answer Question▾

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The figure shows internal structure of plant leaf.

Image shows the inner part of a green leaf with all its parts

Image Shows the Inner Part of a Green Leaf with All Its Parts

In above image label the parts of leaf such as upper epidermis, palisade mesophyll and lower epidermis

What is the exact location of upper epidermis, palisade mesophyll and lower epidermis?

Explanation

mage with complete labelling of inner part

Mage with Complete Labelling of Inner Part

In above image label the parts of leaf such as upper epidermis, palisade mesophyll and lower epidermis

Passage

Figure shows a food web from the grassland ecosystem.

mage shows food web of grassland ecosystem

Mage Shows Food Web of Grassland Ecosystem

In given figure various food chains are interconnected with each other. Every organism come under a tropic level. Labeled producers and top consumer in given food web

Question number: 61 (1 of 4 Based on Passage) Show Passage

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Short Answer Question▾

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Figure shows a pyramid of energy for a food chain from above food web. Which biotic organism have maximum energy. Answer with a suitable reason.

 Image shows food chain of grassland ecosystem

Image Shows Food Chain of Grassland Ecosystem

figure is related to grazing food chain in which at every tropic level energy loss occur

Explanation

Pyramid of energy shows the amount of useful energy in each tropic level and it decreases as the organisms in every level use it. The loss of energy is due to respiration and heat loss. The top consumer of a food pyramid, as a group, thus have much less energy available to support them than those closer to the bottom.