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30 Cards in this Set

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1) Which of the following statements concerning the breakdown of glucose to CO2 and water is (are) true?
A) The breakdown of glucose is exergonic.
B) Adding electrons to another substance is known as reduction.
C) An electron acceptor is called the reducing agent.
D) A and B only are correct.
E) A, B, and C are correct.
D) A and B only are correct.

A) The breakdown of glucose is exergonic.
B) Adding electrons to another substance is known as reduction.
2) The oxygen consumed during cellular respiration is directly involved in
A) accepting electrons at the end of the electron transport chain.
B) the phosphorylation of ADP.
C) the citric acid cycle.
D) the oxidation of pyruvate to acetyl CoA.
E) glycolysis.
A) accepting electrons at the end of the electron transport chain.
3) All of the following statements about NAD+ are true except:
A) NAD+ has more chemical energy than NADH.
B) NAD+ is reduced by the action of dehydrogenases.
C) NAD+ is reduced to NADH during both glycolysis and the Krebs cycle.
D) In the absence of NAD+, glycolysis cannot function.
E) NAD+ can receive electrons for use in oxidative phosphorylation.
A) NAD+ has more chemical energy than NADH.
4) Glycolysis is believed to be one of the most ancient of metabolic processes. Which statement below least supports this idea?
A) Glycolysis neither uses nor needs O2.
B) Bacteria, the most primitive of cells, make extensive use of glycolysis.
C) Glycolysis is found in all eukaryotic cells.
D) If run in reverse, glycolysis will build glucose molecules.
E) The enzymes of glycolysis are found in the cytosol rather than in a membrane-enclosed organelle.
A) Glycolysis neither uses nor needs O2.
5) Which kind of metabolic poison would most directly interfere with glycolysis?
A) an agent that reacts with oxygen and depletes its concentration in the cell
B) an agent that binds to pyruvate and inactivates it
C) an agent that inhibits the formation of acetyl coenzyme A
D) an agent that reacts with NADH and oxidizes it to NAD+
E) an agent that closely mimics the structure of glucose but is not metabolized
E) an agent that closely mimics the structure of glucose but is not metabolized
6) Which process in eukaryotic cells will normally proceed whether O2 is present or absent?
A) the Krebs cycle
B) oxidative phosphorylation
C) glycolysis
D) fermentation
E) electron transport
C) glycolysis
7) All of the following statements about glycolysis are true except:
A) Glycolysis makes ATP exclusively through substrate-level phosphorylation.
B) The enzymes of glycolysis are located in the cytosol of the cell.
C) Glycolysis has steps involving oxidation-reduction reactions.
D) Glycolysis can operate in the complete absence of O2.
E) The end products of glycolysis are CO2 and H2O.
E) The end products of glycolysis are CO2 and H2O.
8) All of the following substances are produced in a muscle cell under anaerobic conditions except
A) pyruvate.
B) ATP.
C) lactate.
D) NADH.
E) acetyl CoA.
E) acetyl CoA.
9) In addition to ATP, what are the end products of glycolysis?
A) CO2 and ethyl alcohol
B) CO2 and H2O
C) NADH and pyruvate
D) H2O and ethyl alcohol
E) CO2 and NADH
C) NADH and pyruvate
10) All of the following are products or intermediaries in glycolysis except
A) FADH2.
B) ATP.
C) phosphoenolpyruvate.
D) NADH.
E) pyruvate.
A) FADH2.
11) All of the following are functions of the Krebs cycle except
A) production of NADH.
B) production of FADH2.
C) adding electrons and protons to oxygen to form water.
D) production of ATP.
E) release of carbon dioxide.
C) adding electrons and protons to oxygen to form water.
12) The Krebs cycle produces which of the following molecules that then transfer energy to the electron transport system?
A) NADH and ATP
B) ATP and CO2
C) NADH, FADH2, and ATP
D) CO2 and FAD
E) FADH2 and NADH
E) FADH2 and NADH
13) Which of the following intermediary metabolites enters the Krebs cycle and is formed, in part, by the removal of CO2 from a molecule of pyruvate?
A) glyceraldehyde phosphate
B) citric acid
C) acetyl CoA
D) oxaloacetic acid
E) lactate
C) acetyl CoA
14) A young relative of yours has never had much energy. He goes to a doctor for help and is sent to the hospital for some tests. There they discover his mitochondria can use only fatty acids and amino acids for respiration, and his cells produce more lactate than normal. Of the following, which is the best explanation of his condition?
A) His cells cannot move NADH from glycolysis into the mitochondria.
B) His cells contain something that inhibits oxygen use in his mitochondria.
C) His mitochondria lack the transport protein that moves pyruvate across the outer mitochondrial membrane.
D) His cells lack the enzyme in glycolysis that forms pyruvate.
E) His cells have a defective electron transport chain, so glucose goes to lactate instead of to acetyl CoA.
C) His mitochondria lack the transport protein that moves pyruvate across the outer mitochondrial membrane.
15) Each time a molecule of glucose is completely oxidized via aerobic respiration, how many oxygen (O2) molecules are required?
A) 12
B) 1
C) 2
D) 6
E) 38
D) 6
Thomas Engelmann illuminated a filament of algae with light that passed through a prism, thus exposing different segments of algae to different wavelengths of light. He added aerobic bacteria and then noted in which areas the bacteria congregated. He noted that the largest groups were found in the areas illuminated by the red and blue light.

1) What did he conclude about the congregation of bacteria in the red and blue areas?
A) Bacteria congregated in these areas due to an increase in the temperature of the red and blue light.
B) Bacteria congregated in these areas because these areas had the most oxygen being released.
C) Bacteria are attracted to red and blue light and thus these wavelengths are more reactive than other wavelengths.
D) Bacteria released excess carbon dioxide in these areas.
E) Bacteria congregated in these areas due to an increase in the temperature caused by an increase in photosynthesis.
B) Bacteria congregated in these areas because these areas had the most oxygen being released.
Thomas Engelmann illuminated a filament of algae with light that passed through a prism, thus exposing different segments of algae to different wavelengths of light. He added aerobic bacteria and then noted in which areas the bacteria congregated. He noted that the largest groups were found in the areas illuminated by the red and blue light.

An outcome of this experiment was to help determine
A) the relationship between wavelengths of light and the amount of heat released.
B) the relationship between the concentration of carbon dioxide and the rate of photosynthesis.
C) the relationship between wavelengths of light and the oxygen released during photosynthesis.
D) the relationship between wavelengths of light and the rate of aerobic respiration.
E) the relationship between heterotrophic and autotrophic organisms.
C) the relationship between wavelengths of light and the oxygen released during photosynthesis.
Thomas Engelmann illuminated a filament of algae with light that passed through a prism, thus exposing different segments of algae to different wavelengths of light. He added aerobic bacteria and then noted in which areas the bacteria congregated. He noted that the largest groups were found in the areas illuminated by the red and blue light.

3) If you ran the same experiment without passing light through a prism, what would you predict?
A) The bacteria would be relatively evenly distributed along the algal filaments.
B) The number of bacteria present would decrease due to an increase in the carbon dioxide concentration.
C) The number of bacteria would decrease due to a decrease in the temperature of the water.
D) The number of bacteria present would increase due to an increase in the carbon dioxide concentration.
E) There would be no difference in results.
A) The bacteria would be relatively evenly distributed along the algal filaments.
4) Organisms that can exist on light and an inorganic form of carbon and other raw materials
A) are called photoautotrophs.
B) are called heterotrophs.
C) are best classified as decomposers.
D) do not exist in nature.
E) are both C and D.
A) are called photoautotrophs.
5) Organisms that metabolize organic molecules produced by other organisms
A) are decomposers.
B) are heterotrophs.
C) are autotrophs.
D) are B and C.
E) are A, B, and C.
E) are A, B, and C.
6) The early suggestion that the oxygen (O2) liberated from plants during photosynthesis comes from water was
A) first published by Melvin Calvin, who also discovered the Calvin cycle.
B) A and B.
C) confirmed by experiments using oxygen-18 (18O).
D) A, B, and C.
E) made following the discovery of photorespiration because of rubisco's sensitivity to oxygen.
C) confirmed by experiments using oxygen-18 (18O).
7) Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin cycle?
A) electrons and H+
B) ADP, Pi, and NADP+
C) H2O and O2
D) CO2 and glucose
E) ATP and NADP
E) ATP and NADP
8) A new flower species has a unique photosynthetic pigment. The leaves of this plant appear to be reddish yellow. What wavelengths of visible light are not being absorbed by this pigment?
A) green and yellow
B) blue and violet
C) green, blue, and violet
D) blue, green, and red
E) red and yellow
E) red and yellow
9) The color of light least effective in driving photosynthesis is
A) yellow.
B) red.
C) green.
D) blue.
E) orange.
C) green.
10) The absorption spectrum for chlorophyll a and the action spectrum for photosynthesis are they different. Why?
A) Bright sunlight destroys photosynthetic pigments.
B) The two lines are probably the result of inaccurate measurements.
C) Other pigments absorb light in addition to chlorophyll a.
D) Green and yellow wavelengths inhibit the absorption of red and blue wavelengths.
E) Anaerobic bacteria probably interfered with light absorption.
C) Other pigments absorb light in addition to chlorophyll a.
11) The reaction-center chlorophyll of photosystem I is known as P700 because
A) there are 700 chlorophyll molecules in the center.
B) this pigment is best at absorbing light with a wavelength of 700 nm.
C) it absorbs 700 photons per minute.
D) there are 700 photosystem I components to each chloroplast.
B) this pigment is best at absorbing light with a wavelength of 700 nm.
12) All of the events listed below occur in the energy-capturing light reactions of photosynthesis except
A) oxygen is produced.
B) ADP is phosphorylated to yield ATP.
C) NADP+ is reduced to NADPH.
D) carbon dioxide is incorporated into PGA.
E) light is absorbed and funneled to reaction-center chlorophyll a.
D) carbon dioxide is incorporated into PGA.
13) In the thylakoid membranes, what is the main role of the antenna pigment molecules?
A) to pass electrons to ferredoxin and then NADPH
B) to harvest photons and transfer light energy to the reaction-center chlorophyll
C) to synthesize ATP from ADP and Pi
D) to concentrate photons inside the stroma
E) to split water and release oxygen to the reaction-center chlorophyll
B) to harvest photons and transfer light energy to the reaction-center chlorophyll
14) The following statements about the light reactions of photosynthesis are all true except:
A) RUBP carboxylase is activated by photons.
B) Electrons are transferred from water to NADP to power of (+).
C) Chlorophyll (and other pigments) absorb light energy, which excites electrons.
D) ATP is generated by photophosphorylation.
E) The splitting of water molecules provides a source of electrons.
A) RUBP carboxylase is activated by photons
15) What is the primary function of the light reactions of photosynthesis?
A) to use ATP to make glucose
B) to produce ATP and NADPH
C) to convert light energy to the chemical energy of PGAL
D) to produce NADPH used in respiration
E) to produce energy-rich glucose from carbon dioxide and water
B) to produce ATP and NADPH