Question

5
Select the appropriate options and complete the following paragraphi
alcohol oxygen, anaerobic respiration, fermentation terobic respiration. Puruvic acid
produced through glycolysis is converted into other organic acids or
with the help of some
mes in this process. This is alled as
Some higher plants, animals and acrobic mic organisms
instead of
there depleta
level in the surrounding
Nekordinis​

Answer 1

Answer:

(a)

Aerobic Respiration  Anaerobic Respiration

1. Aerobic respiration takes place in the presence of free oxygen.  1. Anaerobic respiration takes place in the absence of free oxygen.

2. The first step of this process (glycolysis) takes place in the cytoplasm while the second step (Krebs cycle) is carried out in mitochondria.   2.The complete process is carried out outside the mitochondria i.e., in the cytoplasm.

3. Glucose is completely oxidized into carbon dioxide and water.  3. Glucose is incompletely oxidized into carbon dioxide and ethyl alcohol.

4. 38 molecules of ATP are produced by the complete oxidation of one gram-mole of glucose.  4. Only 2 molecules of ATP are formed in this process.

(b)  

Glycolysis

Fermentation

1. Glycolysis is a common process during aerobic and anaerobic respiration.  1. Fermentation is a type of anaerobic respiration.

2. Pyruvic acid is produced as its end product.  2. Ethanol or lactic acid is produced as its end product.

(c)

Glycolysis  Citric acid cycle (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 in anaerobic respiration.  3. It occurs in aerobic respiration only.

4. One glucose molecule breaks down to generate 2 NADH22 and 2 ATP molecules.  4. It produces 6 NADH22, 2 FADH22, and 2 ATP molecules on the breakdown of two acetyl-CoA molecules generated after glycolysis.