Download Quiz 7 Name: 1. After ATP fuels the Na+/K+ pump at the cell

Quiz 7
Name:_____________________
1. After ATP fuels the Na+/K+ pump at the cell membrane in an animal cell, where do the “used-up”
ADP and Pi go?
A) ADP and Pi accumulate in the cytosol and don’t form ATP again
B) ADP and Pi are regenerated to ATP by the Na+/K+ pump running in reverse
C) ADP and Pi are regenerated to ATP in the chloroplast
D) ADP and Pi are regenerated to ATP in the mitochondrion
E) C and D
2. Cells use the energy of energy-rich food molecules to form ATP. Which of the following represents a
state of high energy?
A) the C-H bonds in food molecules
B) the H (electrons and H+) loaded onto NADH
C) the proton gradient across the mitochondrial membrane
D) the ATP formed
E) all of the above
3. Which molecules can be utilized (directly or after some breakdown) in the cellular respiration
pathway to generate ATP energy?
A) amino acids and proteins
B) glycerol and fatty acids
C) glucose and sucrose
D) starch and glycogen
E) all of the above
4. What is needed to keep glycolysis reaction running? A supply of
A) only glucose
B) only glucose and ADP
C) glucose, ADP, phosphate (Pi), and NAD+
D) only glucose, ADP, and NAD+
E) only glucose and NAD+
5. When O2 is absent, mitochondrial electron transport stops and NADH can no longer drop off
electrons. Predict what happens in the absence of O2:
A) Glycolysis continues to produce ATP irrespective of what happens to NADH.
B) Glycolysis stops unless NADH is used for something else.
6. During intense exercise, as muscles go into anaerobiosis (O2-deprived energy creation),
the body will increase its consumption of
A) fats.
B) proteins.
C) carbohydrates.
D) all of the above
7. Which of the following statements is NOT true for NAD+?
A) In the absence of NAD+, glycolysis can still function.
B) NAD+ is converted to NADH during both glycolysis and the citric acid cycle.
C) NADH has more energy than NAD+.
D) NADH can transfer electrons into the mitochondrial electron transport chain.
8. Cellular respiration harvests the most chemical energy from which of the following?
A) glycolysis
B) fermentation
C) generating carbon dioxide and oxygen in the mitochondrial electron transport chain
D) the mitochondrial part of cellular respiration (citric acid cycle, electron transport, and ATP
synthase)
9. Which does not take place in the cytosol?
A) alcohol fermentation
B) glycolysis
C) citric acid cycle
E) lactic acid fermentation
10. All three classes of polymers (proteins, fats, and carbohydrates) can provide the energy for
mitochondrial ATP synthesis because they all contain
A) Glucose
B) Carbon-hydrogen bonds
C) Carbon-oxygen bonds
D) Phosphate
E) Glycerol