Question # 1

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

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Oxygen

Carbon

Nitrogen

Hydrogen

Dalk reaction takes place in the .......... of chloroplasts.

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Grana

Strome

Intergrana

All

In which component of the leaf cells, chlorophill is present?

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Stroma

Thylakoids

Plasma membrane

Cytoplasm

Exchange of water vapours and gases occurs in leaf through:

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Stomata

Epidermics

Xylem

Phloem

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

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Oxygen

Carbon

Nitrogen

All

The air enters the leaf through __________

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Pits

Stomata

Mesophyll

Xylem vessels

The green portion is minaly reflected therefore chlorophull appears .............. .

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Green

Blue

White

Black

The water from the soil enters into the root hairs by the process of

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Photosynthesis

Osmosis

Diffusion

Respiration

When we work hard we suffer from muscle fatigue because muscle cells:

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Carry out aerobic respiration at faster rate and so are tired

Carry out anaerobic respiration and so-accumulate more CO₂

Carry out anaerobic respiration and so accumulate lactic acid

Carry out aerobic respiration at faster rate and so burst

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

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Constructive

DestructIon

Both

None

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

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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

The concentration of carbon dioxide in the environment is:

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0.3%

0.03%

3%

3.01%

The breaking of one phosphate bond releases _________ kcal/mol of ATP.

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7.9

7.5

7.1

7.3

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