Answer:
Option B, ATP
Explanation:
In the process of respiration, there are four major stages –
A) Glycolysis – In glycolysis, 6 carbon glucose is transformed into pyruvate along with release of ATP and conversion of NAD+ to NADH.
B) Pyruvate oxidation – Pyruvate is converted to Acetyl CoA along with release of CO2 and generation of NADH.
C) Citric acid cycle – Acetyl CoA combines with four carbon molecule to produce NADH, ATP, FADH2 and carbon dioxide is released.
D) Oxidative phosphorylation – In this last stage, NADH and FADH2 are converted back into NAD+ and FAD. Electrons flow back into the matrix thereby producing ATP.
Thus, it it clear that in the last stage of cellular respiration ATP molecule is produced.
