NCERT Solutions for Class 11 Biology Chapter 14

Respiration in Plants Class 11

Chapter 14 Respiration in Plants Exercise Solutions

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Exercise : Solutions of Questions on Page Number : 238

Q1 :  

Differentiate between

(a) Respiration and Combustion

(b) Glycolysis and Krebs' cycle

(c) Aerobic respiration and Fermentation


Answer :

(a) Respiration and combustion

Respiration

Combustion

1.

It is a biochemical process.

1.

It is a physiochemical process.

2.

It occurs in the living cells.

2.

It does not occur in the living cells.

3.

ATP is generated

3.

ATP is not generated

4.

Enzymes are required

4.

Enzymes are not required

5.

It is a biologically-controlled process.

5.

It is an uncontrolled process.

(b) Glycolysis and Krebs cycle

Glycolysis

Krebs cycle

1.

It is a linear pathway.

1.

It is a cyclic pathway.

2.

It occurs in the cell cytoplasm.

2.

It occurs in the mitochondrial matrix.

3.

It occurs in both aerobic and anaerobic respiration.

3.

It occurs in aerobic respiration.

4.

It generates 2 NADH2 and 2 ATP molecules on the breakdown of one glucose molecule.

4.

It produces 6 NADH2, 2FADH2, and 2 ATP molecules on the breakdown of two acetyl-CoA molecules.

(c) Aerobic respiration and fermentation

Aerobic respiration

Fermentation

1.

Oxygen is used for deriving energy

1.

Occurs in the absence of oxygen

2.

Occurs in the cytoplasm and mitochondria

2.

Occurs in the cytoplasm

3.

End products are carbon dioxide and water

3.

End products are ethyl alcohol and carbon dioxide

4.

Complete oxidation of the respiratory substrate takes place

4.

Incomplete oxidation of the respiratory substrate takes place

5.

About 36 ATP molecules are produced

5.

Only 2 ATP molecules are produced

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Q2 :  

What are respiratory substrates? Name the most common respiratory substrate.


Answer :

The compounds oxidised during the process of respiration are called respiratory substrates. Carbohydrates, especially glucose, act as respiratory substrates. Fats, proteins, and organic acids also act as respiratory substrates.

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Q3 :  

Give the schematic representation of glycolysis?


Answer :

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Q4 :  

What are the main steps in aerobic respiration? Where does it take place?


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Q5 :  

Give the schematic representation of an overall view of Krebs cycle.


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Q6 :  

Explain ETS.


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Q7 :  

Distinguish between the following:

(a) Aerobic respiration and Anaerobic respiration

(b) Glycolysis and Fermentation

(c) Glycolysis and Citric acid Cycle


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Q8 :  

What are the assumptions made during the calculation of net gain of ATP?


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Q9 :  

Discuss "The respiratory pathway is an amphibolic pathway."


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Q10 :  

Define RQ. What is its value for fats?


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Q11 :  

What is oxidative phosphorylation?


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Q12 :  

What is the significance of step-wise release of energy in respiration?


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<< Previous Chapter 13 : Photosynthesis in Higher Plants Next Chapter 15 : Plant Growth and Development >>

Biology : CBSE NCERT Exercise Solutions for Class 11th for Respiration in Plants will be available online in PDF book form soon. The solutions are absolutely Free. Soon you will be able to download the solutions.

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