Question

1. Which of the following does not occur during the light-dependent reactions?
Splitting H2O molecules
Chemiosmosis
Glucose synthesis
ATP production

2. Which of the following is NOT involved in the Calvin Cycle?
Carbon Fixation
RUBP regeneration
RUBP
An Electron Transport Chain

3. Which of these does NOT occur during the Krebs Cycle?
O2 is reduced to form water
Conversion of NAD+ to NADH
Conversion of FAD+ to form FADH2
CO2 is produced

4. Select the statement that does NOT apply to glycolysis
Produces 2 net ATP
ATP production via Chemiosmosis
Occurs in the cytoplasm
It is an anaerobic process

5. Which of the following statements about the electron transport chain in the inner mitochondrial membrane is FALSE?
NADH donates high energy electrons
FADH2 donates high energy electrons
It converts two molecules of pyruvate into three acetyl groups
H+ ions are pumped into the inter-membrane space

Answer 1

1) Splitting H2O molecules- occurs during the light reaction, the electrons lost from PSII is replaced from water, water is split to 2H+, 2 electrons and 1/2O2.
Chemiosmosis- occurs in light reaction, creates an H+ gradient across the thylakoid membrane, which is used to synthesize ATP by ATP synthase enzyme in the thylakoid membrane.
Glucose synthesis- occurs in the Calvin cycle.
ATP production- occurs in light reaction, ATP is produced by ATP synthase.

c) glucose synthesis.

2) Carbon Fixation- during the Calvin cycle, carbon dioxide is fixed to sugar molecules.
RUBP regeneration- RuBP is the acceptor of carbon dioxide, later in the cycle, RuBP is regenerated.
RUBP- acceptor of carbon dioxide
An Electron Transport Chain- occurs in light reaction, electrons from PSII, moves to NADPH via electron transport chain.

d) an electron transport chain.

3) during TCA cycle acetyl CoA is oxidized to two carbon dioxide molecules, 3 NADH are produced by reducing NAD+, one FADH is produced by reducing FAD+.

one ATP is produced from ADP and Pi.

during electron transport chain in aerobic respiration oxygen is the final electron acceptor and oxygen is reduced to water, so the answer is a) O2 is reduced to form water.

4) glycolysis does not require oxygen, and it occurs in the cytoplasm, it uses 2 ATPs and produces 4 ATPs so the net yield of ATPs is 2.

ATP is produced by substrate-level phosphorylation, does not involve chemiosmosis.

so the answer is b) ATP production via osmosis.