C-SCIE1101 Module 4 Assessment

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Question 1 of 25

1. Question
1 point(s)
An example of potential energy is ____, and an example of kinetic energy is ____.
- a rock held at the top of a cliff; a snow ball being thrown
- a battery; a pendulum at the top of its swing
- a bat being swung at a ball; the wind up to a pitch
- water flowing over a dam; gasoline running an engine
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Question 2 of 25

2. Question
1 point(s)
Which of the following comparisons or contrasts between endergonic and exergonic reactions is FALSE?
- All endergonic and exergonic reactions require the same amount of energy to overcome an activation barrier.
- Endergonic reactions have a positive ΔG and exergonic reactions have a negative ΔG.
- Endergonic reactions consume energy and exergonic reactions release energy.
- Endergonic reactions are not spontaneous and exergonic reactions are spontaneous.
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Question 3 of 25

3. Question
1 point(s)
What role does the Sun play in plant and animal metabolism?
- It is the ultimate source of energy captured by plants.
- It provides the heat needed to fuel metabolism.
- It is converted into triglycerides for energy storage.
- It is the energy used by animals.
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Question 4 of 25

4. Question
1 point(s)
Energy is stored long-term in the bonds of _____ and used short-term to perform work via a(n)____ molecule.
- glucose; ATP
- sugar; oxygen
- oxygen; sugar
- ATP; glucose
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Question 5 of 25

5. Question
1 point(s)
Which of the following is a catabolic process?
- digestion of sucrose
- dissolving sugar in water
- protein synthesis
- photosynthesis
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Question 6 of 25

6. Question
1 point(s)
What is the most common reaction coupled with other reactions to power them within the cell?
- the hydrolysis of ATP to ADP
- an endergonic reaction with an energy source.
- the dehydration synthesis of ATP from ADP
- they synthesis of glucose from carbon dioxide
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Question 7 of 25

7. Question
1 point(s)
Enzymes are typically:
- proteins
- carbohydrates
- lipids
- DNA
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Question 8 of 25

8. Question
1 point(s)
What is the primary function of enzymes?
- to lower the activation energy of a reaction
- to lower the free energy of a reaction
- to lower the temperature at which a reaction takes place
- to increase the free energy of a reaction
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Question 9 of 25

9. Question
1 point(s)
What happens when a chemical is reduced during a reaction?
- An electron is added to the chemical.
- The compound is reduced to a simpler form.
- The compound is transformed to a more complex form.
- An electron is removed from the chemical.
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Question 10 of 25

10. Question
1 point(s)
Which pair of molecules are both oxidizing agents?
- FAD and NAD⁺
- FADH₂ and NADH
- FAD and FADH₂
- NAD⁺ and NADH
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Question 11 of 25

11. Question
1 point(s)
What biochemical process generates the most ATP during the breakdown of glucose through aerobic respiration?
- oxidative phosphorylation
- substrate-level phosphorylation
- dephosphorylation of ATP
- hydrolysis of ATP
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Question 12 of 25

12. Question
1 point(s)
What is chemiosmosis?
- process in which there is a production of adenosine triphosphate (ATP) in cellular metabolism by the involvement of a proton gradient across a membrane
- process of breaking glucose into two three-carbon molecules with the production of ATP and NADH
- process in which organisms convert energy in the presence of oxygen
- process of regenerating NAD ions with either an inorganic or organic compound serving as the final electron acceptor; occurs in the absence of oxygen
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Question 13 of 25

13. Question
1 point(s)
During the first half of glycolysis __________, and during the second half of glycolysis ________.
- glucose is split in two; ATP is produced
- ATP is consumed; glucose is split in two
- glucose is split in two; ATP is consumed
- ATP is produced; glucose is split in two
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Question 14 of 25

14. Question
1 point(s)
Which of the following statements about glycolysis is true?
- Glycolysis is an anaerobic process.
- Glycolysis ends with the production of three molecules of pyruvate.
- The preparatory stage of glycolysis extracts energy and stores it in the form of ATP and NADH.
- Glycolysis takes place only in eukaryotes.
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Question 15 of 25

15. Question
1 point(s)
Which of the following statements about the citric acid cycle is FALSE?
- Pyruvate enters the citric acid cycle and is converted to citric acid.
- The citric acid cycle takes place in the matrix of mitochondria.
- The citiric acid cycle produces CO₂, NADH, and FADH₂
- The citric acid cycle only occurs in aerobic cellular respiration
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Question 16 of 25

16. Question
1 point(s)
What is the role of electrons in the electron transfer chain that is part of the oxidative phosphorylation component of cellular respiration?
- to power active transport pumps
- to dephosphorylate ATP, producing ADP
- to oxidize oxygen
- to phosphorylate ADP, producing ATP
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Question 17 of 25

17. Question
1 point(s)
During cellular respiration, a proton gradient is generated in the mitochondria. What makes it and for what is it primarily used?
- It is made by the electron transport chain and is primarily used for ATP synthesis.
- It is made by the citric acid cycle (CAC) and is used for substrate-level phosphorylation.
- It is made through the process of glycolysis and is used to produce water.
- It is made by the citric acid cycle (CAC) and is primarily used for ATP synthesis.
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Question 18 of 25

18. Question
1 point(s)
Where would photosynthetic organisms likely be placed on a food web within most ecosystems?
- at the beginning of the food chain
- near the end of the food chain
- in the middle of the food chain
- photosynthetic organisms are not part of the food web in most ecosystems
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Question 19 of 25

19. Question
1 point(s)
An experiment is set up to determine how light intensity affects the rate of photosynthesis in plants. What measurements can be made to determine the rate of photosynthesis?

1. Measure the production of carbon dioxide

2. Measure the production of oxygen

3. Measure the production of glucose

4. Measure the uptake of carbon dioxide

5. Measure the uptake of oxygen

6. Measure the uptake of glucose
- 2, 3, 4
- 1, 2, 6
- 1, 3, 5
- 2, 4, 6
- 3, 4, 5
- 1, 5, 6
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Question 20 of 25

20. Question
1 point(s)
What role does a leaf’s stoma play in photosynthesis?
- to regulate gas exchange and water evaporation
- to absorb sunlight
- it is the primary entrance for liquid water into the plant
- to allow excess glucose to escape
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Question 21 of 25

21. Question
1 point(s)
The light-dependent reactions take place ________, and the light-independent reactions take place __________.
- at thylakoids; in the stroma of the chloroplast
- in the stroma of the chloroplast; at thylakoids
- across the membrane of the chloroplast; in the stroma of the chloroplast
- across the membrane of the chloroplast; at thylakoids
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Question 22 of 25

22. Question
1 point(s)
What type of light energy does a plant typically use to carry out photosynthesis?
- visible, though mostly not green wavelengths
- visible, mostly green wavelengths
- ultraviolet
- infrared
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Question 23 of 25

23. Question
1 point(s)
When a plant absorbs light, the energy from that light is most immediately transferred into what form?
- high-energy electrons
- ATP
- O₂
- glucose
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Question 24 of 25

24. Question
1 point(s)
What is the role of electrons in the electron transfer chain that is part of the light-dependent reactions in photosynthesis?
- to power active transport pumps
- to dephosphorylate ATP, producing ADP
- to reduce water
- to phosphorylate ADP, producing ATP
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Question 25 of 25

25. Question
1 point(s)
Which of the following is true concerning the light-independent reactions (the Calvin cycle) of photosynthesis?
- they convert carbon dioxide from the atmosphere into carbohydrates using the energy and reducing power of ATP and NADPH
- they convert carbon dioxide from the atmospher into carbohydrates using an electron transport chain
- they produce ATP and NADPH using an electrochemical gradient of hydrogen ions
- they convert carbon dioxide from the atmosphere into carbohydrates using an electrochemical gradient of hydrogen ions
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C-SCIE1101 Module 4 Assessment

C-SCIE1101 Module 4 Assessment

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