Question

Given below is a diagram showing ATP synthesis during aerobic respiration, replace the symbols A, B, C, D and E by appropriate terms given in the box.

Answer 1

Labelling of missing parts:

A - ATP
B - F1 particle
C - Pi (inorganic phosphate)
D - 2H+
E - Inner mitochondrial membrane


ATP synthesis:

\(\bullet\) In respiration, ATP is synthesized in the mitochondrial matrix.

\(\bullet\) For ATP synthesis, the inner mitochondrial membrane has ATP synthase enzyme.

\(\bullet\) This enzyme has two subunits \(F_0\) and \(F_1\).

\(\bullet\) \( F_0\) subunit is present within the mitochondrial membrane and \(F_1\) subunit is present on the inner side of the inner mitochondrial membrane, facing towards the mitochondrial matrix.

\(\bullet\) When \(2H^{+}\) ions pass through the \(F_0\) particle, it induces a conformational change in the \(F_1\) particle due to which it rotates and releases ATP in the mitochondrial matrix.