Krebs Cycle

Question 1

Which step in cellular respiration is it

Answer 1

2nd

Question 2

What does the Krebs cycle require a

Answer 2

Oxygen

Question 3

Where does Krebs cycle take place

Answer 3

Inner matrix of mitochondria

Question 4

If oxygen is present, where is pyruvate taken

Answer 4

Pyruvate from step 1 is taken into inner membrane and the Krebs cycle begins

Question 5

Leftover pyruvate molecule from gylycolosis gives off what

Answer 5

The pyruvate gives off A carbon atom in the form of CO2

Question 6

What does the CO2 (given off by pyruvate molecule) combine with

Results in?

Answer 6

CO2 combines with co enzyme a ———-> Acetyl- CoA

New product ^

Question 7

Reactions required for producing Acetyl - CoA store what

Answer 7

And electron in a molecule called NADH

Question 8

4 carbon molecules combine with 2 carbon Acetyl CoA to produce what

Answer 8

6 carbon compound called citric acid

Question 9

During a chain of reaction, 2 carbons are given off from citric acid in the form of CO2. What is produced

Answer 9

1 ATP molecule

Question 10

What is produced due to there being high energy electrons

Answer 10

3 x NADH molecules

Question 11

What happens to NAD+ when it takes on an electron

Answer 11

NADH

Question 12

When 2 electrons are stored in the molecule FAD it becomes ….

Answer 12

FADH2

Question 13

These stored electrons are used when

Answer 13

During the electron transport chain bit in cellular respiration

Question 14

Why is it all X2 in the end

Answer 14

Because there was 2 left over pyruvate molecules off the first step (glycolysis)

Question 15

What is the grand total for the kreb cycle ? Molecules

Answer 15

2 ATP
6 NADH
2 FADH2