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Name _____________________
Honors Biology
Date ____________
Chapter 6 Review: Cellular Respiration!
1.
What is
a.
b.
c.
d.
e.
the role of oxygen in cellular respiration?
It is reduced in glycolysis as glucose is oxidized.
It provides electrons to the electron transport chain.
It combines with the carbon removed during the citric acid cycle to form CO2.
It is required for the production of heat and light.
It is the final hydrogen & electron acceptor in the electron transport chain.
2.
A biochemist wanted to study how various substances were used in cellular respiration. In one experiment, he allowed
a mouse to breathe air containing O2 “labeled” by a particular isotope of oxygen. In the mouse, the labeled oxygen
atoms first show up in
a. ATP.
b. Glucose, C6H12O6
c. carbon dioxide, CO2
d. water, H2O
e. NADH
3.
In a second experiment, mice were fed glucose (C6H12O6) containing a small amount of radioactive oxygen. The mice
were closely monitored, and in a few minutes radioactive atoms showed up in
a. CO2
b. NADH
c. H2O
c. ATP
d. O2
4.
In glycolysis, ____ is oxidized and ____ is reduced.
a. NAD+….glucose
b. Glucose…oxygen
5.
Which of the following processes is responsible for making most of the ATP in your cells?
a. the reduction of oxygen
b. the transfer of phosphates from intermediate substances to ADP
c. the diffusion of hydrogen ions across a membrane during chemiosmosis
d. the splitting of glucose into two molecules of pyruvic acid
e. the reduction of coenzymes
6.
The main function of cellular respiration is
a. breaking down toxic molecules.
b. making food.
c. making ATP that powers cellular metabolism.
7.
Oxidatative phosphorylation includes
a. ETC and fermentation
b.
chemiosmosis and ETC
c. the citric acid cycle
8.
____ is used and ____ is produced in the overall process of cellular respiration.
a. CO2….H2O
b. O2….glucose
c. H2O....ATP
d. Glucose....CO2 e. ATP...O2
c. ADP…ATP
d. glucose….NAD+
d. producing chemical “building blocks” for cell structures.
e. breaking down ATP, so that ADP and P can be reused.
d. chemiosmosis only
e. the conversion of ATP into ADP and phosphate
9. The energy given up by electrons as they move through the ETC is used to
a. break down glucose.
d. oxidize water.
b. make NADH and FADH2.
e. manufacture water.
c. pump H+ through the membrane, generating a gradient.
10. A chemist has discovered a drug that blocks an enzyme that catalyzes the second reaction in glycolysis. He thought he
could use the drug to kill bacteria in people with infections, but he can’t do this because
a. Bacteria are facultative anaerobes; they usually don’t need to perform glycolysis.
b. Glycolysis produces so little ATP that the drug will have little effect.
c. Human cells also perform glycolysis; the drug might also poison them.
d. Bacteria do not perform glycolysis.
11. A glucose molecule is completely oxidized in glycolysis and the citric acid cycle, but these two processes yield only a
few ATPS. Where is the rest of the energy the cell obtains from the glucose molecule?
a. in FAD and NAD+
c. in NADH and FADH2
b. in the oxygen used in the ETC
d. in the CO2 molecules released in the processes
12. Fermentation is essentially glycolysis plus an extra step in which pyruvic acid is reduced to form lactic acid or alcohol
and CO2. This last step
a. removes poisonous oxygen from the environment.
c. Enables the cell to recycle NAD+
b. Extracts a bit more energy from glucose.
d. Inactivates toxic pyruvic acid.
13. The ATP synthase in a human cell gets energy for making ATP directly from
a. Sunlight
d. movement of electrons through a series of carriers
b. flow of H+ down a concentration gradient
e. reduction of oxygen
c. oxidation of glucose
14. Which of the following describes glycolysis?
a. It begins the oxidation of glucose.
b. It produces a small amount of ATP.
c. It generates NADH.
d. It splits glucose to form 2 molecules of pyruvic acid.
e. All of the above.
Check your overall understanding of cellular respiration by matching each of the phrases below with one of
the 3 stages of the process.
Use G for glycolysis, CA for the citric acid cycle, and OP for oxidative phosphorylation.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Generates most of the ATP formed by cellular respiration.
Begins the oxidation of glucose.
Occurs outside the mitochondrion.
Produces 4 ATP per glucose, but 2 ATPs per glucose are used to get it started.
Oxidizes NADH and FADH2, producing NAD+ and FAD
Electrons and hydrogens combine with O2 to form H2O
Occurs in the cristae of the mitochondria.
FADH2 and NADH deliver high energy electrons/hydrogens to this stage.
Generates most of the CO2 produced by cellular respiration.
ATP synthase makes ATP
Glycolysis is the first of three pathways in cellular respiration. Review glycolysis by matching each phrase
on the right with a term on the left.
A. Fermentation
______1. End product of Pyruvic Acid Breakdown
B. Pyruvic Acid
______2. The first intermediate in the Krebs Cycle
C. ATP
______3. Location of Electron Transport Chain
+
D. NAD
______4. Form of chemical energy used in the cell
E. Glucose
______5. Final Hydrogen Acceptor
F. Oxygen
______6. Coenzyme that gets reduced as glucose is oxidized
G. Citric Acid
______7. Stage of anaerobic respiration that does not yield energy
H. Acetyl CoA
______8. The first intermediate in glycolysis
I. Phosphorylation
______9. End product of glycolysis
J. PGAL
______10. Fuel broken down in both aerobic & anaerobic respiration
K. Cristae
______ 11. The movement of phosphate groups to pass energy