Citric Acid Cycle

Question 1

What is the citric acid cycle

Answer 1

Series of chemical reactions to release stored energy through the oxidation of acetyl- CoA derived from carbohydrates, fats and proteins

Question 2

Where does citric acid cycle occur

Answer 2

Mitochondrial matrix

Question 3

How did the citric acid cycle evolve

Answer 3

To harvest electrons that could then be used to completely oxidise food molecules to CO2 and H2O

Question 4

What biosynthetic precursors can the cycle provide

Answer 4

Building blocks of nucleotide bases, heme groups, proteins

Question 5

What is an anaplerotic reaction

Answer 5

A build up of a product triggers the activation of an enzyme that triggers another reaction eg build up of acetylCoA activating pyruvate carboxylase which converts pyruvate to oxaloacetate