Question 1

Often the mnemonic device "OIL RIG" is used to remember the principles of redox reactions. Oxidation Is Loss and Reduction Is Gain of what?

Accepted Answer

A)   Electrons only
B)   Hydrogen only
C)   Oxygen only
D)   Electrons and hydrogen
E)   Oxygen and electronsF) D) and E)
G) None of the above

Question 2

Your bacterium is growing on a type of medium called casein agar, which contains milk protein (casein) . There is a clear zone around the growth area of the bacterium, showing that it is synthesizing the enzymes needed to catalyze the breakdown of casein. These enzymes are considered ______.

Accepted Answer

A)   apoenzymes
B)   exoenzymes
C)   ribozymes
D)   endoenzymesE) A) and C)
F) B) and C)

Question 3

Which of the following is not true of the light-dependent reactions of photosynthesis?

Accepted Answer

A)   They occur in thylakoid membranes.
B)   They generate NADPH.
C)   They generate glucose from CO₂ and H₂O.
D)   The photons cause magnesium to release electrons.
E)   ATP is generated by a chemiosmotic mechanism.F) B) and E)
G) None of the above

Question 4

Which of the following metabolic system descriptions is mismatched?

Accepted Answer

A)   Cyclic - the starting molecule is regenerated to initiate another turn
B)   Convergent - a linear pathway branches into two or more alternative processes
C)   Linear - the product of enzyme A becomes the substrate for enzyme B
D)   Divergent - one or more branches deviate from a linear pathE) B) and D)
F) All of the above

Question 5

In bacterial cells, the electron transport system is located in the ______.

Accepted Answer

A)   cell membrane
B)   mitochondria
C)   chloroplasts
D)   ribosomes
E)   cytoplasmF) A) and D)
G) All of the above

Question 6

Each of the following are true of enzymes except _______.

Accepted Answer

A)   they can be used over and over
B)   they may or may not require cofactors
C)   their active site is speciﬁc to the substrate
D)   they increase the activation energy of a reaction
E)   their action may involve mineralsF) B) and C)
G) A) and E)

Question 7

The redox carriers of the electron transport system that have a tightly bound metal atom responsible for accepting and donating electrons are ______.

Accepted Answer

A)   NAD molecules
B)   FAD molecules
C)   NADP molecules
D)   the cytochromes
E)   the ﬂavoproteinsF) A) and D)
G) A) and C)

Question 8

Reactants are converted to products by _______.

Accepted Answer

A)   enzymes releasing energy
B)   breaking and forming bonds
C)   enzymes binding to products
D)   reactants always releasing energyE) A) and B)
F) B) and D)

Question 9

A bacterium that you isolated from pond water appears to use light for energy. Based upon this information, you inoculate the organism into fresh media, infused with lots of carbon dioxide. Even after incubation at the correct temperature (of pond water) , the organism is not growing. Your best
Explanation of what might have happened is _______.

Accepted Answer

A)   there was no sulfur compound added to the medium, that could be used as an electron donor
B)   no oxygen was added to the medium so the organism died
C)   there is some inhibitory chemical that is preventing the growth of the bacterium
D)   you were using the wrong type of sunlight as the energy source for the bacteriumE) A) and B)
F) A) and C)

Question 10

Glycolysis uses 2 ATP and produces _______.

Accepted Answer

A)   2 ATP only if oxygen is present
B)   2 ATP without oxygen
C)   4 ATP only if oxygen is present
D)   4 ATP without oxygenE) B) and C)
F) All of the above

Question 11

An oxidase detection test can be used to identify certain bacteria because they are missing or lack expression of ______.

Accepted Answer

A)   cytochrome C oxidase
B)   NAD
C)   mitochondria
D)   ATP synthase
E)   coenzyme QF) None of the above
G) B) and C)

Question 12

Recently discovered bacteria that inhabit the ocean ?oor undergo photosynthesis using light from chemical reactions, the breaking of mineral crystals, or from bubble formation.

Accepted Answer

A) True 
 B)False

Question 13

In addition to electrons, which of the following is also involved in electron transfer?

Accepted Answer

A)   ADP
B)   Glucose
C)   Carbon
D)   Hydrogen
E)   Carbon dioxideF) A) and E)
G) All of the above

Question 14

All aerobic bacterial species have identical electron acceptors in their electron transport systems.

Accepted Answer

A) True 
 B)False

Question 15

The relationship between the light-dependent and light-independent reactions in photosynthesis is that _______.

Accepted Answer

A)   the ATP made during the light-dependent reactions is used for the growth and development of the cell and the ATP from the oxidation of glucose drives the lightReactions
B)   the light-independent reactions are driven by the ATP and NADPH generated from the light reactions
C)   the light-dependent and light-independent reactions both take place within the membranes of bacterial cells or thylakoid membranes of chloroplasts
D)   the energy stored in the glucose made during the Calvin cycle is used to drive the light reactionsE) None of the above
F) All of the above

Question 16

What process is described here? A concentration gradient of H+ ions is created in the periplasmic space by actively transporting the ions across the membrane using the energy liberated when carrier molecules are oxidized. When the H+ ions pass through ATPase, enough energy is generated to add phosphate groups onto ADP molecules.

Accepted Answer

A)   Fermentation
B)   The Calvin cycle
C)   Substrate-level phosphorylation
D)   Oxidative phosphorylation
E)   DeaminationF) B) and C)
G) A) and E)

Question 17

In bacterial cells, when glucose is completely oxidized by all the pathways of aerobic cellular respiration, what is the maximum number of ATP generated?

Accepted Answer

A)   2
B)   3
C)   24
D)   36
E)   38F) All of the above
G) C) and D)

Question 18

During the Calvin cycle, carbon dioxide gas is ?xed into a solid, organic form; this is an endergonic process driven by ATP generated from aerobic respiration.

Accepted Answer

A) True 
 B)False

Question 19

Enzymes are _______.

Accepted Answer

A)   broken down in reactions that require energy input
B)   proteins that function as catalysts
C)   used up in chemical reactions
D)   not needed for catabolic reactions
E)   carbohydrate or protein in compositionF) A) and D)
G) A) and C)

Question 20

Glycolysis and the Krebs cycle yield 10 molecules of NADH per molecule of glucose. How many molecules of ATP will be made from them in the electron transport system?

Accepted Answer

A)   10
B)   38
C)   36
D)   2
E)   30F) A) and B)
G) D) and E)

Exam 8: Microbial Metabolism: the Chemical Crossroads of Life

Your bacterium is growing on a type of medium called casein agar, which contains milk protein (casein) . There is a clear zone around the growth area of the bacterium, showing that it is synthesizing the enzymes needed to catalyze the breakdown of casein. These enzymes are considered ______.

Correct Answer
verified

During the Calvin cycle, carbon dioxide gas is ?xed into a solid, organic form; this is an endergonic process driven by ATP generated from aerobic respiration.

Correct Answer
verified

In bacterial cells, when glucose is completely oxidized by all the pathways of aerobic cellular respiration, what is the maximum number of ATP generated?

Correct Answer
verified

Which of the following metabolic system descriptions is mismatched?

Correct Answer
verified

Each of the following are true of enzymes except _______.

Correct Answer
verified

All aerobic bacterial species have identical electron acceptors in their electron transport systems.

Correct Answer
verified

The redox carriers of the electron transport system that have a tightly bound metal atom responsible for accepting and donating electrons are ______.

Correct Answer
verified

An oxidase detection test can be used to identify certain bacteria because they are missing or lack expression of ______.

Correct Answer
verified

In addition to electrons, which of the following is also involved in electron transfer?

Correct Answer
verified

Reactants are converted to products by _______.

Correct Answer
verified

In bacterial cells, the electron transport system is located in the ______.

Correct Answer
verified

Enzymes are _______.

Correct Answer
verified

Correct Answer
verified

Glycolysis uses 2 ATP and produces _______.

Correct Answer
verified

The relationship between the light-dependent and light-independent reactions in photosynthesis is that _______.

Correct Answer
verified

Glycolysis and the Krebs cycle yield 10 molecules of NADH per molecule of glucose. How many molecules of ATP will be made from them in the electron transport system?

Correct Answer
verified

Correct Answer
verified

Which of the following is not true of the light-dependent reactions of photosynthesis?

Correct Answer
verified

Often the mnemonic device "OIL RIG" is used to remember the principles of redox reactions. Oxidation Is Loss and Reduction Is Gain of what?

Correct Answer
verified

Recently discovered bacteria that inhabit the ocean ?oor undergo photosynthesis using light from chemical reactions, the breaking of mineral crystals, or from bubble formation.

Correct Answer
verified

Exam 8: Microbial Metabolism: the Chemical Crossroads of Life

Your bacterium is growing on a type of medium called casein agar, which contains milk protein (casein) . There is a clear zone around the growth area of the bacterium, showing that it is synthesizing the enzymes needed to catalyze the breakdown of casein. These enzymes are considered ______.

Correct AnswerverifiedShow Answer

During the Calvin cycle, carbon dioxide gas is ?xed into a solid, organic form; this is an endergonic process driven by ATP generated from aerobic respiration.

Correct AnswerverifiedShow Answer

In bacterial cells, when glucose is completely oxidized by all the pathways of aerobic cellular respiration, what is the maximum number of ATP generated?

Correct AnswerverifiedShow Answer

Which of the following metabolic system descriptions is mismatched?

Correct AnswerverifiedShow Answer

Each of the following are true of enzymes except _______.

Correct AnswerverifiedShow Answer

All aerobic bacterial species have identical electron acceptors in their electron transport systems.

Correct AnswerverifiedShow Answer

The redox carriers of the electron transport system that have a tightly bound metal atom responsible for accepting and donating electrons are ______.

Correct AnswerverifiedShow Answer

An oxidase detection test can be used to identify certain bacteria because they are missing or lack expression of ______.

Correct AnswerverifiedShow Answer

In addition to electrons, which of the following is also involved in electron transfer?

Correct AnswerverifiedShow Answer

Reactants are converted to products by _______.

Correct AnswerverifiedShow Answer

In bacterial cells, the electron transport system is located in the ______.

Correct AnswerverifiedShow Answer

Enzymes are _______.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Glycolysis uses 2 ATP and produces _______.

Correct AnswerverifiedShow Answer

The relationship between the light-dependent and light-independent reactions in photosynthesis is that _______.

Correct AnswerverifiedShow Answer

Glycolysis and the Krebs cycle yield 10 molecules of NADH per molecule of glucose. How many molecules of ATP will be made from them in the electron transport system?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following is not true of the light-dependent reactions of photosynthesis?

Correct AnswerverifiedShow Answer

Often the mnemonic device "OIL RIG" is used to remember the principles of redox reactions. Oxidation Is Loss and Reduction Is Gain of what?

Correct AnswerverifiedShow Answer

Recently discovered bacteria that inhabit the ocean ?oor undergo photosynthesis using light from chemical reactions, the breaking of mineral crystals, or from bubble formation.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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