CELLULAR RESPIRATION FINAL EXAM GUIDE
2025
|MOST COMMON QUESTIONS WITH CORRECTLY
VERIFIED ANSWERS|ALREADY A+
GRADED|GUARANTEED PASS
The ATP made during glycolysis is generated by
A) oxidation of NADH to NADH+
B) photophosphorylation
C) chemiosmosis
D) electron transport
E) substrate-level phosphorylation - E
What is the term for metabolic pathways that release stored energy by breaking down complex
molecules?
A) bioenergetic pathways
B) catabolic pathways
C) thermodynamic pathways
D) fermentaiton pathways
E) anabolic pathways - B
Which of the following statements describes the results of this reaction?
C6H12O6 + 6O2 --> 6CO2 + 6H2O + Energy
A) O2 is oxidized and H2O is reduced.
B) CO2 is reduced and O2 is oxidized.
C) C6H12O6 is oxidized and O2 is reduced.
,D) C6H12O6 is reduced and CO2 is oxidized.
E) O2 is reduced and CO2 is oxidized. - C
Substrate-level phosphorylation accounts for approximately what percentage of the ATP formed
during glycolysis?
A) 0%
B) 38%
C) 10%
D) 100%
E) 2% - D
Where does glycolysis takes place?
A) cytosol
B) mitochondrial outer membrane
C) mitochondrial inner membrane
D) mitochondrial intermembrane space
E) mitochondrial matrix - A
When a molecule of NAD+ (nicotinamide adenine dinucleotide) gains a hydrogen atom (not a
hydrogen ion) the molecule becomes
A) redoxed.
B) hydrogenated.
C) oxidized.
D) reduced.
E) a reducing agent. - D
A molecule that is phosphorylated
A) has a decreased chemical reactivity; it is less likely to provide energy for cellular work.
B) has been oxidized as a result of a redox reaction involving the gain of an inorganic phosphate.
C) has less energy than before its phosphorylation and therefore less energy for cellular work.
,D) has an increased chemical reactivity; it is primed to do cellular work.
E) has been reduced as a result of a redox reaction involving the loss of an inorganic phosphate.
- D
Which process in eukaryotic cells will proceed normally whether oxygen (O2) is present or
absent?
A) oxidative phosphorylation
B) chemiosmosis
C) electron transport
D) glycolysis
E) the citric acid cycle - D
In the presence of oxygen, the three-carbon compound pyruvate can be catabolized in the citric
acid cycle. First, however, the pyruvate 1) loses a carbon, which is given off as a molecule of
CO2, 2) is oxidized to form a two-carbon compound called acetate, and 3) is bonded to
coenzyme A.
These three steps result in the formation of
A) acetyl CoA, O2, and ATP.
B) acetyl CoA, NADH, H+, and CO2.
C) acetyl CoA, FAD, H2, and CO2.
D) acetyl CoA, FADH2, and CO2.
E) acetyl CoA, NADH+, ATP, and CO2 - B
The oxygen consumed during cellular respiration is involved directly in which process or event?
A) the citric acid cycle
B) the phosphorylation of ADP to form ATP
C) accepting electrons at the end of the electron transport chain
D) glycolysis
E) the oxidation of pyruvate to acetyl CoA - C
During glycolysis, when glucose is catabolized to pyruvate, most of the energy of glucose is
, A) transferred directly to ATP.
B) retained in the pyruvate.
C) used to phosphorylate fructose to form fructose-6-phosphate.
D) stored in the NADH produced.
E) transferred to ADP, forming ATP. - B
Starting with one molecule of glucose, the "net" products of glycolysis are
A) 2 NADH, 2 H+, 2 pyruvate, 2 ATP, and 2 H2O
B) 6 CO2, 6 H2O, 36 ATP, and 2 citrate
C) 2 NAD+, 2 H+, 2 pyruvate, 2 ATP, and 2 H2O
D) 2 FADH2, 2 pyruvate, 4 ATP, and 2 H2O
E) 6 CO2, 6 H2O, 2 ATP, and 2 pyruvate - A
For each moleule of glucose that is metabolized by glycolysis and the citric acid cycle, what is
the total number of NADH + FADH2 molecules produced?
A) 5
B) 12
C) 10
D) 6
E) 4 - B
Carbon dioxide (CO2) is released during which of the following stages of cellular respiration?
A) glycolysis and the oxidation of pyruvate to acetyl CoA
B) fermentation and glycolysis
C) oxidative phosphorylation and fermentation
D) oxidation of pyruvate to acetyl CoA and the citric acid cycle
E) the citric acid cycle and oxidative phosphoryation - D
How many carbon atoms are fed into the citric acid cycle as a result of the oxidation of one
molecule of pyruvate?
2025
|MOST COMMON QUESTIONS WITH CORRECTLY
VERIFIED ANSWERS|ALREADY A+
GRADED|GUARANTEED PASS
The ATP made during glycolysis is generated by
A) oxidation of NADH to NADH+
B) photophosphorylation
C) chemiosmosis
D) electron transport
E) substrate-level phosphorylation - E
What is the term for metabolic pathways that release stored energy by breaking down complex
molecules?
A) bioenergetic pathways
B) catabolic pathways
C) thermodynamic pathways
D) fermentaiton pathways
E) anabolic pathways - B
Which of the following statements describes the results of this reaction?
C6H12O6 + 6O2 --> 6CO2 + 6H2O + Energy
A) O2 is oxidized and H2O is reduced.
B) CO2 is reduced and O2 is oxidized.
C) C6H12O6 is oxidized and O2 is reduced.
,D) C6H12O6 is reduced and CO2 is oxidized.
E) O2 is reduced and CO2 is oxidized. - C
Substrate-level phosphorylation accounts for approximately what percentage of the ATP formed
during glycolysis?
A) 0%
B) 38%
C) 10%
D) 100%
E) 2% - D
Where does glycolysis takes place?
A) cytosol
B) mitochondrial outer membrane
C) mitochondrial inner membrane
D) mitochondrial intermembrane space
E) mitochondrial matrix - A
When a molecule of NAD+ (nicotinamide adenine dinucleotide) gains a hydrogen atom (not a
hydrogen ion) the molecule becomes
A) redoxed.
B) hydrogenated.
C) oxidized.
D) reduced.
E) a reducing agent. - D
A molecule that is phosphorylated
A) has a decreased chemical reactivity; it is less likely to provide energy for cellular work.
B) has been oxidized as a result of a redox reaction involving the gain of an inorganic phosphate.
C) has less energy than before its phosphorylation and therefore less energy for cellular work.
,D) has an increased chemical reactivity; it is primed to do cellular work.
E) has been reduced as a result of a redox reaction involving the loss of an inorganic phosphate.
- D
Which process in eukaryotic cells will proceed normally whether oxygen (O2) is present or
absent?
A) oxidative phosphorylation
B) chemiosmosis
C) electron transport
D) glycolysis
E) the citric acid cycle - D
In the presence of oxygen, the three-carbon compound pyruvate can be catabolized in the citric
acid cycle. First, however, the pyruvate 1) loses a carbon, which is given off as a molecule of
CO2, 2) is oxidized to form a two-carbon compound called acetate, and 3) is bonded to
coenzyme A.
These three steps result in the formation of
A) acetyl CoA, O2, and ATP.
B) acetyl CoA, NADH, H+, and CO2.
C) acetyl CoA, FAD, H2, and CO2.
D) acetyl CoA, FADH2, and CO2.
E) acetyl CoA, NADH+, ATP, and CO2 - B
The oxygen consumed during cellular respiration is involved directly in which process or event?
A) the citric acid cycle
B) the phosphorylation of ADP to form ATP
C) accepting electrons at the end of the electron transport chain
D) glycolysis
E) the oxidation of pyruvate to acetyl CoA - C
During glycolysis, when glucose is catabolized to pyruvate, most of the energy of glucose is
, A) transferred directly to ATP.
B) retained in the pyruvate.
C) used to phosphorylate fructose to form fructose-6-phosphate.
D) stored in the NADH produced.
E) transferred to ADP, forming ATP. - B
Starting with one molecule of glucose, the "net" products of glycolysis are
A) 2 NADH, 2 H+, 2 pyruvate, 2 ATP, and 2 H2O
B) 6 CO2, 6 H2O, 36 ATP, and 2 citrate
C) 2 NAD+, 2 H+, 2 pyruvate, 2 ATP, and 2 H2O
D) 2 FADH2, 2 pyruvate, 4 ATP, and 2 H2O
E) 6 CO2, 6 H2O, 2 ATP, and 2 pyruvate - A
For each moleule of glucose that is metabolized by glycolysis and the citric acid cycle, what is
the total number of NADH + FADH2 molecules produced?
A) 5
B) 12
C) 10
D) 6
E) 4 - B
Carbon dioxide (CO2) is released during which of the following stages of cellular respiration?
A) glycolysis and the oxidation of pyruvate to acetyl CoA
B) fermentation and glycolysis
C) oxidative phosphorylation and fermentation
D) oxidation of pyruvate to acetyl CoA and the citric acid cycle
E) the citric acid cycle and oxidative phosphoryation - D
How many carbon atoms are fed into the citric acid cycle as a result of the oxidation of one
molecule of pyruvate?
