Chief Editor
In which of the following steps of respiration CO2 is produced? 
Difficulty: Easy
A:

Glycolysis

B:

Krebs cycle

C:

Electron transport chain

D:

All of these 

Oxygen takes part in aerobic respiration in
Difficulty: Easy
A:

Glycolysis

B:

Link step between glycolysis and Krebs cycle 

C:

Krebs cycle 

D:

Electron transport chain

When a plant was kept in darkness for many days its leaves turned yellow. Why? 
Difficulty: Easy
A:

Leaves could not get oxygen and so there was no photosynthesis 

B:

Leaves could not get light and so there was no respiration 

C:

Leaves could not get oxygen and so there was no respiration 

D:

Leaves could not get light and so there was no photosynthesis

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From which bonds of ATP molecule energy is taken? 
Difficulty: Easy
A:

P-P bonds

B:

C-H bonds 

C:

C-N bonds

D:

C-O bonds 

In which component of the leaf cells, chlorophyll is present? 
Difficulty: Easy
A:

Stroma

B:

Thylakoids 

C:

Plasma membrane

D:

Cytoplasm

Which of these can enter into Krebs cycle?
Difficulty: Hard
A:

Glucose

B:

Pyurvic acid

C:

Citric acid

D:

Acetyla Co-A

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When we work hard we suffer from muscle fatigue because muscle cells
Difficulty: Medium
A:

Carry out aerobic respiration at a faster rate and so are tired  

B:

Carry out anaerobic respiration and so accumulate more $CO_{2}$

C:

Carry out anaerobic respiration and so accumulate lactic acid 

D:

Carry out aerobic respiration at faster rate and so burst 

Many molecules of $CO_{2}$ are produced when the Krebs cycle operates once. 
Difficulty: Easy
A:

01

B:

02

C:

03

D:

06

In which of the following metabolic processes, do oxidation as well as reduction of molecules occur? 
Difficulty: Medium
A:

Photosynthesis

B:

Respiration 

C:

Both

D:

None of these 

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Chlorophyll pigment absorbs maximum light in wavelengths of
Difficulty: Easy
A:

Green and blue

B:

Green and red 

C:

Green only

D:

Red and blue

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