Question

Which combination of statement is correct?
(i) In aerobic respiration , glycolysis occurs in the cytoplasm of a cell.
(ii) In aerobic respiration, glycolysis cannot occur without the presence of oxygen.
(iii) In the process of glycolysis, glucose molecules are oxidised to produce the molecules of pyruvate.
(iv) In aerobic respiration , glycolysis occurs in the mitochondria of a cell.
(v) In aerobic respiration, oxidation of pyruvate molecules to produce $C{O}_2,H_{2}O$ and energy, occurs in mitochondria.

• A. i, ii, iii and v
• B. i, ii, iv and v
• C. i, ii, and iii
  
• D. i, iii, and v
• E. None of these

Answer 1

The correct option is D i, iii, and v

1) Glycolysis occurs in the cytoplasm of the cell, so this option is correct.

2) Glycolysis does not require oxygen, so this option is incorrect.

3) In glycolysis, glucose molecules are oxidized to form 2 molecules of pyruvate. Hence, this option is correct.

4) Glycolysis, whether in aerobic or anaerobic respiration, occurs is the cytoplasm of the cell. Thus, this option is incorrect.

5) In aerobic respiration, oxidation of pyruvate molecules to produce $C{O}_2$, $H_{2}O$, and energy takes place during Kreb's cycle that occurs in mitochondria.

So the correct answer is option D i.e.- 'i, iii, v'