SELECT * FROM question_mgmt as q WHERE id=47 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=2 AND subId=7 AND chapterId=17 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED)

Question: 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 physicochemical 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 as well as anaerobic respiration.

3.

It occurs in aerobic respiration only.

4.

Net Generation of 2 NADH+H+ and 2 ATP molecules occurs on the breakdown of one glucose molecule.

4.

It produces 6 NADH+H+, 2FADH2, and 2 ATP molecules on the breakdown of two acetyl-CoA molecules generated after glycolysis of one glucose molecule.

 

(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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