Question

Pyruvic acid, the end product of glycolysis enters the mitochondria for further oxidation.

(i) Name the cycle it enters.
(ii) List any two end products of the cycle.
(iii) Mention the number of ATP produced at the end of one cycle.
(iv) Name the next phase which the hydrogen carriers produced during this cycle, enter &
why.

Answer 1

Hey mate! Here is your answer:
(i) Kreb's Cycle
(ii) Energy in the form of ATP and Water(H2O)
(iii) ATP molecules at end of aerobic respiration are 38 and anaerobic respiration are 2
(iv) Glucose catabolism ends during the Krebs cycle. This does not mean that all of the energy previously contained in glucose was used in the production of ATP. In fact, only one additional ATP molecule (per molecule of pyruvate) is produced by substrate-level phosphorylation in the Krebs cycle. The balance of extracted energy is tied up in NADH and FADH2.

In the next phase of cellular respiration, the high-energy electrons within NADH and FADH2 will be passed to a set of membrane-bound enzymes in the mitochondrion, collectively referred to as the electron transport chain. These electrons will provide energy to do work. Specifically, this work will involve the movement of positively charged hydrogen atoms (H+), also known as protons.

The movement of protons across the inner
mitrochondrial membrane (by the electron transport chain) creates a charge differential (voltage) that will be used to synthesize ATP. 

Hope it helps you.....