Lesson 3 - krebs cycle

Question 1

Mitochondrial matrix

Answer 1

The location within the mitochondria where the Krebs cycle takes place

Question 2

pyruvate oxidation

Answer 2

Pyruvate oxidation is the process that changes pyruvate (a product of glycolysis) into a molecule called acetyl-CoA, which is needed for the next step in cellular respiration (the Krebs cycle)
It happens in the mitochondria and also produces carbon dioxide and NADH.
Takes place in the mitochondrial matrix

Question 3

There are three main steps in pyruvate oxidation

Answer 3

1. one carbon is removed from pyruvate and leaves as carbon dioxide.
2. the rest of the molecule is changed in little, and it gives electrons to NAD+, which turns into NADH.
3. the final part joins with a helper molecule called Coenzyme A to make something called acetyl CoA.

Question 4

Highest to lowest pH occurs in the mitochondrion

Answer 4

The highest pH in a mitochondrion typically occurs in the mitochondrial matrix, while the lowest pH is usually found in the intermembrane space.