Download Cellular Respiration Cellular respiration is a ______(metabolic

Cellular Respiration
1.
2.
3.
4.
Cellular respiration is a ____________(metabolic) pathway where organic molecules are disassembled by
__________(enzymes). In order to get maximum ATP production, ____________ (Oxygen)is required.
glycolysis, and it occurs in the cytosol.
a. During the early steps of glycolysis, glucose is converted to glucose 6-P, and then glucose 6-P is
converted directly to:
A. aldolase.
B. fructose 6-P.
b. In the process of glycolysis:
A. one enzyme converts glucose into NADH.
B. two enzymes are involved in breaking glucose down to ten pyruvate molecules.
C. ten enzymes are involved in breaking glucose down to two pyruvate molecules
c. Glycolysis results in the breakdown of a glucose molecule and the net production of 2 ATP
molecules.
d. The binding of ATP to phosphofructokinase inhibits the glycolytic pathway.
TRUE
intermediate stage, anaerobic and occurs in the mitochondria.
a. Which stage of cellular respiration is catalyzed by pyruvate dehydrogenase?
A. Electron transport system
B. Intermediate stage
b. Decarboxylation occurs during the intermediate stage of aerobic cellular respiration.
TRUE
c. If insufficient oxygen is available for the anaerobic breakdown of pyruvate, it is converted to
_________.
lactic acid
d. Pyruvate dehydrogenase is located in the:
A. cytosol.
B. cell membrane.
C. outer compartment of the mitochondrion.
D. middle of the crista.
E. matrix of the mitochondrion
Citric acid cycle,
a. During the citric acid cycle, an acetyl CoA molecule produced in the intermediate stage combines
with a molecule of:
A. oxaloacetic acid.
b. The citric acid cycle involves:
A. a multienzyme complex within the cytosol.
B. several enzymes within the matrix of the mitochondrion.
c.
One turn of the citric acid cycle results in the formation of:
A.
B.
C.
D.
1 ATP, 3 NADH, and 1 FADH2.
2 pyruvates and 2 ATP.
2 ATP, 2 NADH+, and 3 FADH.
2 citrates, 4 ATP, and 3 FADH2.
d.
The coenzymes that will provide the electrons needed for the electron transport system are:
A. NADH and FADH2.
B. NAD and FAD+.
C. acetyl CoA and citrate.
D. pyruvate and NADH.
E. FAD and decarboxylase.
e. The electron transport chain functions in:
A. anaerobic respiration, and involves proteins in the outer membrane of mitochondria.
B. anaerobic respiration, and involves proteins in the cristae of mitochondria.
C. aerobic respiration, and involves proteins in the outer membrane of mitochondria.
D. aerobic respiration, and involves proteins in the cristae of mitochondria.
5. During cellular respiration, decarboxylation occurs when:
A. a carbon atom is removed from glucose.
B. a carbon dioxide molecule is removed from the cytosol.
C. a carboxyl group is released from pyruvate.
6. Hexokinase is an enzyme involved in cellular respiration, and its substrate is glucose. To perform this
function, hexokinase is located:
A. in the lumen of the stomach.
B. in the lumen of the small intestine.
C. inside the mitochondria of cells.
D. in the cytosol of cells.
7. During cellular respiration, when glucose is fully disassembled to carbon dioxide and water, the other
reactant (with glucose) in the chemical equation is ___________.
oxygen or O2
8. Glucose oxidation is exergonic. TRUE
9. The indirect method of ATP production involves coenzymes such as FAD and is referred to as _________
phosphorylation. oxidative
10. The more common way that ATP is produced in cells is:
A. the indirect pathway known as oxidative phosphorylation.
B. the indirect pathway known as substrate-level phosphorylation.
C. the direct pathway known as oxidative phosphorylation.
D. the direct pathway known as substrate-level phosphorylation.
11. Which of the following choices lists the order of stages of cellular respiration in proper order?
A. Glycolysis, intermediate stage, citric acid cycle, and the electron transport system
B. Citric acid cycle, glycolysis, intermediate stage, and the electron transport system
C. Glycolysis, citric acid cycle, intermediate stage, and the electron transport system
D. Glycolysis, intermediate stage, electron transport system, and the citric acid cycle
E. Citric acid cycle, electron transport chain, intermediate stage, and glycolysis