Name: ________________________________________
Date: _________________________
Quiz – Ch. 9 and 10 (Respiration and Photosynthesis)
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A molecule becomes more oxidized when it:
A) Changes shape
C) loses a H+ ion
E) loses an electron
B) Gains a H+ ion
D) gains an electron
The function of cellular respiration is to:
A) Reduce CO2
D) extract usable energy from glucose
B) Extract CO2 from the atmosphere
E) produce carbohydrates
C) Synthesize macromolecules from monomers
Each ATP molecule contains about 1% of the amount of chemical energy available from the
complete oxidation of a single glucose molecule. Cellular respiration produces about 38 ATP
from one glucose molecule. What happens to the rest of the energy in glucose?
A) It’s stored as fat
B) It’s converted to heat
C) It’s used to make water from hydrogen ions and oxygen
D) It’s released as carbon dioxide and water
E) It’s converted to starch
A chemist has discovered a drug that blocks phosphoglucoisomerase, an enzyme that catalyzes
the second reaction in glycolysis. He wants to use the drug to kill bacteria in people with
infections. But he can't do this because _____.
A) Bacteria are prokaryotes; they usually don’t need to perform glycolysis
B) Glycolysis produces so little ATP that the drug will have little effect
C) Human cells must also perform glycolysis; the drug might also poison them
D) This step in the pathway of glycolysis can be skipped in bacteria, but not in humans
E) Glycolysis can occur without the action of enzymes
During respiration in a eukaryotic cell, reactions of glycolysis occur where?
A) In the cytoplasm
B) In the matrix of the mitochondrion
C) In the inner membrane of the mitochondrion
D) In the intermembrane space of the mitochondrion
E) Across the inner membrane of the mitochondrion
What is the name of the process in which glucose is converted to pyruvate with the production
of ATP and NADH?
A) Fermentation
B) glycolysis C) citric acid cycle
D) chemiosmosis
Most of the NADH that delivers electrons to the electron transport chain comes from which of
the following?
A) Oxidative phosphorylation B) glycolysis C) anabolic pathways D) citric acid cycle
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In an experiment, mice were fed glucose (C6H12O6) containing a small amount of radioactive
oxygen. The mice were closely monitored, and in a few minutes radioactive oxygen atoms
showed up in which compound?
A) Carbon dioxide
B) NADH
C) water
D) ATP E) oxygen gas
During respiration in a eukaryotic cell, reactions of the citric acid cycle occur _____.
A) In the cytosol
C) in the cristae of the mitochondrion
B) In the matrix of the mitochondrion
D) in the intermembrane space
Which of the following represents the major (but not the only) energy accomplishment of the
citric acid cycle?
A) formation of CO2
B) formation of ATP
C) formation of NADH and FADH2
D) utilization of O2
The energy given up by electrons as they move through the electron transport chain is used in
which of the following processes?
A) The breakdown of glucose
C) the production of NADH and FADH2
B) The oxidation of water
D) pumping H+ across a membrane
Which one of the following best describes the electron transport chain?
A) Electrons are pumped across a membrane by active transport
B) Acetyl CoA is fully oxidized to CO2
C) Hydrogen atoms are added to CO2 to make an energy-rich compound
D) Glucose is broken down to a three-carbon compound in preparation for the citric acid cycle.
E) Electrons are passed from one carrier to another, releasing a little energy at each step.
In photosynthesis, plants use carbon from _____ to make sugar and other organic molecules.
A) Water
B) carbon dioxide
C) chlorophyll D) the sun E ) soil
Which of the following would NOT be capable of performing photosynthesis?
A) A bacterium
B) a pine tree C) a mushroom
D) seaweed
E) algae
How does carbon dioxide enter the leaf?
A) Through the chloroplasts
C) through the thylakoids
B) Through the mesophyll
D) through the stomata
Molecular oxygen is produced during _____.
A) Glycolysis
C) the Calvin cycle
B) Light reactions of photosynthesis D) the electron transport chain
The photosynthetic event known as the Calvin cycle occurs in the _____.
A) Thylakoid membrane
B) stroma
C) stomata
D) matrix
The wavelengths of light absorbed by pigments in the granum are mainly in which range?
A) Green, which is why plants are green
C) the entire spectrum of white light
B) Blue-violet and red-orange
D) the range absorbed by carotenoids
Where do the electrons needed by photosystem II originate?
A) Other chlorophyll molecules
C) the electron transport chain
B) ATP
D) water
20. Both mitochondria and chloroplasts _____.
A) use a hydrogen ion (proton) gradient to produce ATP
B) obtain electrons from water
C) reduce NAD+, forming NADP
D) release oxygen as a by-product
21. The light reactions of photosynthesis generate high-energy electrons, which end up in ____.
The light reactions also produce ____ and ____.
A) ATP ... NADPH ... oxygen
C) water ... sugar ... oxygen
B) oxygen ... sugar ... ATP
D) NADPH ... ATP ... oxygen
22. RuBisCo is:
A) the enzyme in plants that first captures CO2 to begin the Calvin cycle
B) the enzyme responsible for splitting H2O to produce O2 in photosynthesis
C) the enzyme that forms a 4-carbon compound in CAM metabolism
D) the 5-carbon sugar molecule that reacts with CO2 to begin the Calvin cycle
23. In the Calvin cycle, CO2 is combined _____.
A) with a 2-carbon compound to form a 3-carbon compound
B) with a 5-carbon compound to form an unstable 6-carbon compound, which decomposes
into two 3-carbon compounds
C) with a 7-carbon compound to form two 4-carbon compounds
D) with a 5-carbon compound to form a stable 6-carbon compound that can be converted
directly to glucose