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BIO 233 > Week 9 - Homework Quiz > Flashcards

Week 9 - Homework Quiz Flashcards

Metabolism

1
Q

What type of chemical reaction drives ATP production?

a. Exergonic reactions.

b. Endergonic reactions.

A

a. Exergonic reactions.

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2
Q

Which step of cell respiration occurs within the cytoplasm?

a. Krebs cycle.

b. Glycolysis.

c. Electron transport chain.

A

b. Glycolysis.

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3
Q

When a glucose molecule enters glycolysis what substance will be produced at the end that will continue on and enter the Krebs cycle?

a. Pyruvate.

b. NADH.

c. O2.

d. ATP.

e. CO2.

A

a. Pyruvate.

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4
Q

Which component of an oxidation-reduction reactions refers to the substance in the reaction that is losing electrons?

a. Reduction.

b. Oxidation.

A

b. Oxidation.

LEO =
Loss of
Electron is
Oxidation

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5
Q

How many cycles of Krebs cycle must a cell perform to process the product(s) of glycolysis?

a. Five cycles.

b. Two cycles.

c. Four cycles.

d. Three cycles.

e. One cycle.

A

b. Two cycles.

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6
Q

What two steps of cell respiration produce the coenzyme NADH?

a. Glycolysis and Krebs cycle.

b. Krebs cycle and electron transport chain.

c. Glycolysis and electron transport chain.

A

a. Glycolysis and Krebs cycle.

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7
Q

What step of cell respiration requires a hydrogen ion concentration gradient as a critical element in its process?

a. Electron transport chain.

b. Glycolysis.

c. Krebs cycle.

A

a. Electron transport chain.

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8
Q

Which two steps of cell respiration occur within the mitochondria?

a. Krebs cycle and electron transport chain.

b. Glycolysis and Krebs cycle.

c. Glycolysis and electron transport chain.

A

a. Krebs cycle and electron transport chain.

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9
Q

What step of cell respiration produces water?

a. Krebs cycle.

b. Electron transport chain.

c. Glycolysis.

A

b. Electron transport chain.

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10
Q

Which step of cell respiration produces the coenzyme FADH2?

a. Krebs cycle.

b. Electron transport chain.

c. Glycolysis

A

a. Krebs cycle.

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11
Q

Where does the carbon and oxygen of CO2 that we breathe out originate from?

a. Oxygen.

b. FADH2.

c. ATP.

d. NADH.

e. Glucose.

A

e. Glucose.

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12
Q

On average how many ATP molecules are produced during the electron transport chain?

a. 18.

b. 10.

c. 32.

d. 42.

e. 12.

A

c. 32.

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13
Q

Identify the one INCORRECT statement about basal metabolic rate (BMR).

a. As surface area to volume ratio increases, BMR increases.

b. BMR is disproportionately higher in men.

c. BMR decreases with age.

d. BMR is influenced by multiple hormones such as thyroxine.

e. BMR decreases with stress.

A

e. BMR decreases with stress.

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14
Q

Identify the set of terms related to metabolism that work together to describe a type of metabolic process.

a. Anabolism, endergonic, synthesis.

b. Catabolism, synthesis, exergonic.

c. Anabolism, exergonic, synthesis.

d. Catabolism, synthesis, endergonic.

e. Catabolism, endergonic, decomposition.

A

a. Anabolism, endergonic, synthesis.

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15
Q

What process produces lactic acid?

a. Aerobic metabolism.

b. Anaerobic metabolism.

A

b. Anaerobic metabolism.

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16
Q

A concentration gradient is an example of what type of energy.

a. Potential energy.

b. Kinetic energy.

A

a. Potential energy.

17
Q

Which step of cell respiration costs ATP to be initiated?

a. Krebs cycle.

b. Electron transport chain.

c. Glycolysis.

A

c. Glycolysis.

18
Q

What creates the difference in calories burned between basal metabolic rate and total metabolic rate?

a. The amount of energy we must produce that does not come from the food we eat daily (i.e., burning stored fuel).

b. The level of activity that we engage beyond lying still, being awake and supporting essential life functions.

c. Basal metabolic rate is dependent on our level of activity, and total metabolic rate is based upon our genetically determined metabolic efficiency.

d. The degree of efficiency of our individual metabolic processes makes up the difference.

A

b. The level of activity that we engage beyond lying still, being awake and supporting essential life functions.

19
Q

Which step of cell respiration produces the greatest number of ATP?

a. Krebs cycle.

b. Glycolysis.

c. Electron transport chain.

A

c. Electron transport chain.

20
Q

What is the value of producing lactic acid during anaerobic metabolism?

a. It donates ATP to the process of glycolysis to provide sustainable fuel for the cycle.

b. It produces glucose to continue fueling glycolysis and ATP production.

c. It is converted into ATP to fuel the body processes.

d. It accepts electrons and H+ from NADH to allow glycolysis to continue to occur.

e. It lowers the pH in the body to make the metabolism more efficient.

A

d. It accepts electrons and H+ from NADH to allow glycolysis to continue to occur.

21
Q

What substance binds the electrons and hydrogen ions that play a critical role in the process of the electron transport chain?

a. Pyruvate.

b. ATP.

c. O2.

d. CO2.

e. NADH and FADH2.

A

c. O2.

22
Q

What is the source of energy to create and maintain the hydrogen ion concentration gradient in between the two mitochondrial membranes?

a. ATP that is being produced throughout cell respiration and especially during the electron transport chain.

b. From the breakdown of CO2 that was produced in earlier steps of the cell respiration cycle.

c. Electrons moving from more electronegative cytochromes to less electronegative cytochromes in the mitochondrial membrane.

d. From the coenzymes that were produced in earlier steps of the cell respiration cycle.

e. O2 gas that is consumed during the electron transport chain.

A

c. Electrons moving from more electronegative cytochromes to less electronegative cytochromes in the mitochondrial membrane.

23
Q

What chemical component delivers hydrogen and electrons to the electron transport chain?

a. ATP.

b. Pyruvate.

c. Coenzymes.

d. Glucose.

e. Acetyl CoA.

A

c. Coenzymes.

24
Q

What type of chemical reactions do ATP molecules drive (facilitate)?

a. Endergonic reactions.

b. Exergonic reactions.

A

a. Endergonic reactions.

25
Q

Which step of cell respiration produces CO2?

a. Krebs cycle.

b. Electron transport chain.

c. Glycolysis.

A

a. Krebs cycle.

26
Q

If we could create an engineered human (all ethical considerations aside) what negative impact could be created by making our metabolic processes 100% efficient (making fuel into ATP is 100% efficient and no energy is wasted)?

a. The engineered human could not thermoregulate because they would produce no excess energy as heat.

b. The engineered human would have to consume more calories to produce equivalent amounts of ATP.

c. The engineered human’s cells would become exhausted because their cells would never get any rest.

A

a. The engineered human could not thermoregulate because they would produce no excess energy as heat.

27
Q

Which step of cell respiration consumes oxygen?

a. Glycolysis.

b. Krebs cycle.

c. Electron transport chain.

A

c. Electron transport chain.

28
Q

Where does the lactic acid produced during anaerobic metabolism go to be processed as we recover from oxygen debt?

a. Stomach.

b. Pancreas.

c. Liver.

d. Heart.

e. Kidneys.

A

c. Liver.

BIO 233 (62 decks)

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