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21. What is the first step in respiration? Where it takes place in cell and what it forms? 22. Differentiate between Aerobic and Anaerobic respiration.
Asked by rahmanfarseen | 03 Apr, 2018, 07:07: PM
answered-by-expert Expert Answer

21. The first stage of cellular respiration is glycolysis. It takes place in the cytosol of the cytoplasm. Glycolysis involves the breakdown of one molecule of six carbon compound glucose into two molecules of three carbon compound pyruvic acid. 

22. Differences between aerobic and anaerobic respiration:

AEROBIC RESPIRATION

ANAEROBIC RESPIRATION

1. Also called oxybiotic respiration.

1. Also called anoxybiotic respiration.

2. Proceeds in the presence of oxygen.

2. Proceeds in the absence of oxygen.

3. Occurs in mitochondria.

3. Occurs in cytoplasm.

4. Complete breakdown of glucose.

4. Incomplete breakdown of glucose.

5. End-products are carbon dioxide and water.

5. End-products are ethyl alcohol and carbon dioxide.

6. Large quantity of energy is liberated (38 ATP) from one mole of glucose.

6. Small quantity of energy is liberated (2 ATP) from one mole of glucose.

7. Normally occurs throughout life.

7. Occurs temporarily for short periods.
Answered by Sheetal Kolte | 04 Apr, 2018, 11:48: AM

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