7.3 Pyruvate Oxidation Flashcards Preview

Biology 241 > 7.3 Pyruvate Oxidation > Flashcards

Flashcards in 7.3 Pyruvate Oxidation Deck (12)
1

glycolysis occurs in almost all living organisms but it does not:

generate very much energy in the form of ATP, pyruvate still contains lots of chemical potential energy in its bonds

2

in the presence of oxygen, pyruvate can be further:

oxidized to release more energy, first to acetyl-CoA and then even further in the citric acid cycle

3

in eukaryotes, pyruvate oxidation is the first step that takes place in the:

mitochondria

4

the end products of glycolysis (pyruvate) are transported into the:

mitochondria

5

intermembrane space

the space between the inner and outer mitochondrial membranes

6

mitochondrial matrix

the space enclosed by the inner membrane of the mitochondria

7

pyruvate is first transported into the:

mitochondrial matrix where it is converted into acetyl-CoA

8

how is pyruvate converted into acetyl CoA?

part of the pyruvate molecule is oxidized and splits off to form CO2, the electrons lost in this process are donated to NAD+ to form NADH, the remaining part of the pyruvate is an acetyl group which contains large amounts of potential energy and is transferred to (CoA)

9

carbon dioxide is the most oxidized and _____

least energetic form of carbon

10

what is the first substrate in the citric acid cycle?

acetyl-CoA

11

the synthesis of one molecule of acetyl-CoA from pyruvate results in the:

formation of one molecule of carbon dioxide and one molecule of NADH

12

what is produced in the pyruvate oxidation stage from a single starting molecule of glucose?

two molecules of carbon dioxide, two molecules of NADH, and two molecules of acetyl-CoA