(i) When and where does anaerobic respiration occur in man and yeast?�

1.	(i) When and where does anaerobic respiration occur in man and yeast? (ii) Why is less energy produced during anaerobic respiration than in aerobic respiration? (iii) Where is the respiratory electrons transport system located in a cell? (iv) What compound is the terminal electron acceptor in aerobic respiration?
Answer» (i) In man, it occurs during the heavy exercise in the muscles. In yeast, the anaerobic respiration occurs in fermentation. (ii) It is because of the following: (a) the end products of anaerobic respiration can be further oxidised to release energy, (b) the regeneration of NAD does not yield ATP, as the electrons are not transported to oxygen. (iii) In the membranes of mitochondria. (iv) Oxygen.

(i) When and where does anaerobic respiration occur in man and yeast? (ii) Why is less energy produced during anaerobic respiration than in aerobic respiration? (iii) Where is the respiratory electrons transport system located in a cell? (iv) What compound is the terminal electron acceptor in aerobic respiration?

Answer»

(i) In man, it occurs during the heavy exercise in the muscles. In yeast, the anaerobic respiration occurs in fermentation.

(ii) It is because of the following:

(a) the end products of anaerobic respiration can be further oxidised to release energy,

(b) the regeneration of NAD does not yield ATP, as the electrons are not transported to oxygen.

(iii) In the membranes of mitochondria.

(iv) Oxygen.