Potential warm up questions 3

Question 1

in glycolysis, each glucose is split into two molecules of

Answer 1

pyruvate

Question 2

Where does glucose occur in the cell?
does it require oxygen?

Answer 2

cytosol of the cell
does not require oxygen

Question 3

In glycolysis are the ATP formed by substrate level of phosphorylation or by oxidative phosphorylation ?

Answer 3

substate- level phosphorylation

Question 4

Glycolysis has an “energy investment” phase and an “energy payoff” phase, ____ ATP are used; the net energy yield in the “payoff” phase is ___ATP and _____ NADH

Answer 4

2
2
2

Question 5

KEY POINT: NADH from stage 1 carries electrons to the

Answer 5

electron transport chain

Question 6

Stage 2: Pyruvate Oxidation and the citric Acid Cycle

Where within the cell do pyruvate oxidation and the citric acid cycle take place?
Do pyruvate oxidation and the citric acid cycle require oxygen?

Answer 6

-Mitochondria
- yes, require oxygen

Question 7

Three mini-steps occur as each pyruvate is “groomed” before the citric acid cycle:
a. A carbon is removed from pyruvate and released in the form of _______.
b. The electrons from that carbon are transferred to NAD+, forming _________.
c. Coenzyme A joins the remaining two carbons, forming _________________.

Answer 7

CO2
NADH
Acetyl CoA

Question 8

The citric acid cycle starts with one “incoming” molecule of _____________________ (a 2-carbon molecule). It adds
its two carbons to ___________________ , forming ________________ . Ultimately, the two carbons are released
in the form of ____________. The electrons that used to be associated with these carbons are transferred to
NAD+ and FAD+, forming ______ NADH and ______ FADH2.

Answer 8

Acetyl CoA
oxoloacatate
citric acid
CO2
3 NADH
1FADH2

Question 9

For each glucose, how much ATP is generated in Stage 2 of cellular respiration? Are these ATP formed by substrate-
level phosphorylation or by oxidative phosphorylation?

Answer 9

Per glucose in glycolysis: net 2 ATP(x2)
Per glucose in pyruvate: 1ATP (X2)

Question 10

KEY POINT: NADH and FADH2 from Stage 2 carry electrons to the ______________________________.

Answer 10

Electron transport chain

Question 11

Where within the cell do pyruvate oxidation and the citric acid cycle take place? Do pyruvate oxidation and the citric
acid cycle require oxygen?

Answer 11

inter membrane
requires oxygen