BIO 102 Cellular Respiration Questions

cytosol of the cell

glycolysis occurs in _

mitochondrion matrix

acetyl coenzyme a formation occurs in the _

mitochondrion matrix

Krebs cycle occurs in the _

mitochondrion inner membrane

electron transport & ATP synthase occurs in the _

C

Looking at the summary diagram, determine which step of aerobic cellular respiration doesn’t produce any ATP for the cell. Which step is it?

A. Krebs cycle (Citric Acid Cycle)
B. glycolysis
C. formation of acetyl Co A
D. electron transport system
E. Calvin cycle

B

Where within the eukaryotic cell does the Krebs Cycle (citric acid cycle) take place?

A. cytoplasm
B. mitochondrial matrix
C. mitochondrial inner membrane
D. all of the above

B

During which step of ACR are the greatest number of electrons harvested (electron carriers loaded up)?

A. Formation of Acetyl CoA
B. Krebs Cycle
C. ETC and ATP synthase
D. Glycolysis

E

If aerobic cellular respiration begins with the first reaction of glycolysis, the electrons carried by NADH and FADH2 and delivered to the electron transport system were originally part of the ________ molecule.

A. H2O
B. ATP
C. ATP synthase
D. H+
E. glucose

D

___________ is the final electron acceptor in aerobic cellular respiration.

A. pyruvate
B. H2O
C. CO2
D. O2
E. ATP

D

During cellular respiration, enough energy is transferred from one glucose molecule to form
_______ ATP molecules.

A. 1
B. 5 -10
C. ~25
D. 36 - 38
E. >200

C

How does DNP affect your body’s function?

A. It blocks O2 from accepting electrons.
B. It prevents glycolysis.
C. It makes the inner membrane of the mitochondria leaky to H+.
D. It prevents electron delivery by NADH and FADH2
E. It prevents heat production by muscle cells.

D

Which reaction shown below releases the most energy?

A. ADP + Pi = ATP
B. CO2 + H2O = Glucose
C. ATP = ADP + Pi
D. Glucose = CO2 + H2O

b

Fermentation pathways make no more ATP beyond the small yield of glycolysis. The remaining reactions (pyruvate to either ethanol or lactate) serve to _______________.

a. make critical molecules (alcohol and lactic acid) that are necessary for cellular function.
b. regenerate NAD+ molecules.
c. make acetyl CoA that will spin the Krebs cycle.
d. produce oxygen for aerobic respiration.
e. produce more NADH and FADH2.

c

Approximately, how many ATP molecules are produced during aerobic cellular respiration from one glucose molecule?

a. 100
b. 58 - 60
c. 36-38
d. 14 - 16
e. < 1

e

Which type of human cell carries on the most fermentation?

a. skin
b. blood
c. neurons
d. fat
e. muscle

e

Which part of aerobic cellular respiration produces the most ATP for the cell?

a. Calvin Cycle
b. formation of acetyl coenzyme A
c. Krebs Cycle (Citric Acid)
d. glycolysis
e. electron transport system and ATP synthase

e

The aerobic cellular respiration process that contributes the greatest number of electrons to the electron transport system is ______________.

a. glycolysis
b. fermentation
c. Calvin Cycle
d. formation of acetyl coenzyme A
e. Krebs cycle (Citric Acid Cycle

a

Mitochondria have a "bag within a bag" structure. This structure is necessary

a. for the ETC (electron transport chain) to set up a concentration gradient of hydrogen ions within the organelle.
b. in order to separate the enzymes used for glycolysis from the enzymes used during the Krebs cycle.
c. in order to keep the electron carriers (NADH and FADH2) away from the electron transport chain.
d. in order for the organelle safely store the high amounts of carbon dioxide that are generated during the Krebs cycle.
e. in order for the organelle store high levels of oxygen that are necessary for glycolysis.

d

The energy needed for ATP synthesis by ATP synthase is obtained directly from _______________.

a. glucose
b. electrons
c. sunlight
d. H+ gradient established by the electron transport chain
e. NADH and FADH2

c

Which of the below is TRUE?

a. Electron energy increases as an electron moves through the electron transport system.
b. Oxygen is the final product produced by the electron transport system during aerobic cellular respiration.
c. Lactic acid (lactate) is the byproduct of fermentation that occurs in human muscle cells.
d. The electron transport system produces NADH and FADH2 molecules

a

During aerobic cellular respiration, carbon dioxide is produced _____________________.

a. during the formation of acetyl CoA and during the Krebs Cycle.
b. during all steps except glycolysis
c. during glycolysis only
d. only during electron transport
e. during glycolysis and electron transport

d

Where within a eukaryotic cell does the Krebs cycle (Citric Acid Cycle) occur? (Be specific)

a. in the cytoplasm
b. in the plasma membrane
c. in the mitochondrial inner membrane
d. in the mitochondrial matrix
e. in the nucleus

c

f cellular respiration begins with the first reaction of glycolysis, the electrons carried to the electron transport system by NADH and FADH2 were originally part of _____________.

a. water
b. pyruvate
c. glucose
d. oxygen
e. ATP

a

How efficient is fermentation?

a. ~2%
b. ~10%
c. ~15%
d. ~40%
e. It is more efficient than aerobic cellular respiration.

a

Which of the below statements about glycolysis is NOT true?

a. carbon dioxide is produced during glycolysis
b. 2 ATPs for every glucose molecule are required to begin glycolysis
c. 2 pyruvate molecules/ glucose are produced by glycolysis
d. Glycolysis occurs in the cytoplasm.
e. NADH is produced during glycolysis

b

Which of the following is an energy-generating process that occurs in ALL living organisms?

a. citric acid cycle (Krebs)
b. glycolysis
c. photosynthesis
d. anaerobic cellular respiration
e. protein synthesis

2

How many electron carriers get produced during glycolysis?

NADH

Which form (NAD+ or NADH) is carrying electrons?

2 NADH

How many electron carriers get produced/ glucose during Step 2?

6 NADH, 2 FADH

How many electron carriers get produced/ glucose during Step 3?

NADH, FADH

Which forms of electron carriers get produced?

4 CO2

how many CO2 get produced / glucose during Step 3?