Question 1

Refer to the first image. Which process is primarily depicted by the sequence of colored boxes and arrows within the mitochondrion?

Accepted Answer

Electron Transport Chain (ETC) in cellular respiration

Question 2

In the first image, the folded structure in the background represents the inner membrane of the mitochondrion. What is the main advantage of this folding?

Accepted Answer

It increases the surface area for the electron transport chain and ATP synthesis.

Question 3

In the second image, the movement of small spheres across the membrane is shown. What do these spheres most likely represent in the context of the electron transport chain?

Accepted Answer

Protons (H+ ions)

Question 4

Based on the second image, what is the role of the large purple structures embedded in the membrane?

Accepted Answer

They are electron carriers that pump protons across the membrane.

Question 5

In the second image, the final large purple structure on the right is associated with the production of a yellow starburst shape. What does this yellow starburst most likely represent?

Accepted Answer

ATP

Question 6

In the context of the second image, which equation best represents the process occurring at the final purple structure (ATP synthase)?

Accepted Answer

$$\mathrm{ADP + P_i + H^+_{gradient} \rightarrow ATP + H_2O}$$

Question 7

Refer to the third image. What process is being depicted, as indicated by the presence of light and green structures?

Accepted Answer

Photosynthesis (light reactions)

Question 8

In the third image, what is the function of the green structures that absorb light energy?

Accepted Answer

They are chlorophyll-containing photosystems that initiate electron transport.

Question 9

In the third image, the movement of small spheres across the membrane is shown. What is the significance of this movement in the context of photosynthesis?

Accepted Answer

It represents the active transport of protons (H+) to create a gradient for ATP synthesis.

Question 10

Which of the following best describes the similarity between the processes depicted in the second and third images?

Accepted Answer

Both involve the creation of a proton gradient to drive ATP synthesis via chemiosmosis.

Question 11

In the context of the third image, what is the fate of the ATP produced during the light reactions of photosynthesis?

Accepted Answer

It is used in the Calvin cycle to help synthesize glucose.

Question 12

Which of the following equations best represents the overall process occurring in the third image (light reactions of photosynthesis)?

Accepted Answer

$$\mathrm{H_2O + NADP^+ + ADP + P_i + light \rightarrow O_2$ + NADPH + ATP}$$

Question 13

In the first image, what is the fate of the carbons from glucose during cellular respiration?

Accepted Answer

They are released as CO2 during the Krebs cycle and pyruvate oxidation.

Question 14

In the second image, what is the role of oxygen in the electron transport chain?

Accepted Answer

It is the final electron acceptor, forming water.

Question 15

Which of the following best explains why the processes in the second and third images both require membrane-bound protein complexes?

Accepted Answer

To facilitate the transfer of electrons and the pumping of protons, creating a gradient for ATP synthesis.

Unit 3 Study Guide: Glycolysis, Cellular Respiration, Fermentation, Photosynthesis, and Cellular Reproduction

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