Which molecules transport electrons from the citric acid cycle to the electron transport chain?
NADH and FADH2
ATP and ADP
GTP and GDP
oxaloacetate and citric acid
None of the answers are correct.
2.
Which of the following atoms has the highest electronegativity?
sulfur
oxygen
hydrogen
nitrogen
carbon
3.
Which process in oxidative phosphorylation releases energy?
the transfer of electrons in redox reactions
the buildup of H+ ions on one side of the mitochondrial membrane
the rotation of the ATP synthase rotor
the synthesis of ATP from ADP and a phosphate group
All answers are correct.
4.
Which statement regarding facultative anaerobes is true?
They can survive in the presence or absence of oxygen.
They require oxygen to survive.
They require the absence of oxygen to survive.
They cannot metabolize glucose.
They require carbon dioxide to survive.
5.
Suppose a microorganism invades a cell, causing damage to ATP synthase. How would cellular respiration be affected?
Electrons could not be passed down the electron transport chain.
ADP could not be joined with a phosphate to form ATP.
Hydrogen ions could not be pumped into the mitochondrial intermembrane space.
The cell could not release any energy from the glucose molecule.
Glucose could not be broken down into pyruvate.
6.
What does yeast produce that causes bread to rise?
NADH
NAD+
ATP
oxygen
carbon dioxide
7.
In the process of alcoholic fermentation, what causes the liquid to bubble?
oxygen
carbon dioxide
nitrogen
alcohol
sugar
8.
Which process yields the most ATP?
alcohol fermentation
anaerobic respiration
lactic acid fermentation
aerobic respiration
glycolysis
9.
What is the function of oxidation reactions in the citric acid cycle?
to catalyze ATP synthesis
to release energy from substrate molecules
to oxidize NAD+ to NADH
to break down glucose into pyruvate
All answers are correct.
10.
How many molecules of ATP are produced by glycolysis followed by fermentation?
1
2
4
28
none
11.
Which biochemical process do aerobic respiration, anaerobic respiration and fermentation all have in common?
glycolysis
citric acid cycle
oxidative phosphorylation
electron transport chain
non-oxygen molecules as final electron acceptors
12.
Which compound is oxidized during fermentation?
ADP
ATP
CO2
NADH
NAD+