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9th Class Biology Chapter 7 Bioenergetics English Medium KPK Boards Online Mcqs MCQs With Answers

Question # 1

When we work hard we suffer form muscle fatigue muscle cells.

Choose an answer

Carry out aerobic respiration and so accumulate more CO₂

Carry out anaerobic respiration and so accumulate lactic acid

Carry out aerobic respiration at faster rate and so accumulate lactic acid

Carry out aerobic respiration at faster rate and so are tired

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Question # 2

In which compound of the leaf cells, chlorophyll is present?

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Stroma

Thylakoids

Plasma membrane

Cytoplasm

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Question # 3

Carbon Dioxide is almost .......... percent in air.

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0,01

0.3

0,03

0.1

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Question # 4

Anaerobic respiration occurs in the absence of ............. .

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Oxygen

Carbon

Nitrogen

All

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Question # 5

Respiration is a.............. process.

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Constructive

DestructIon

Both

None

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Question # 6

At ..............°C the process of photosynthesis stops.

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20°C

30°C

25°C

45°cC

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Question # 7

Aerobic respiration needs free ............. .

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Carbon

Nitrogen

Oxygen

None

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Question # 8

In living organisms, redox reactions involving the loss and gain of _____________ atom.

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Oxygen

Carbon

Nitrogen

Hydrogen

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Question # 9

______________ reactions are the direct source of energy.

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Oxidation

Redox

Reduction

None

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Question # 10

krebs cycle occurs in ................. .

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Cytoplasm

Mitochondria

Lysosome

Nucleus

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Question # 11

The word photosynthesis is a combination of two ............. words.

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Greek

Latin

German

Freech

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Question # 12

No life would be possible if the process of .............. stops.

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Respiration

Photosynthesis

Both

None

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Question # 13

Photosynthesis is a .............. process.

Choose an answer

Constructive

Destruction

Both

None

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