$$6 \ \mathrm{CO}_2 + 6 \ \mathrm{H}_2O + \text{light energy} \rightarrow \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6 \ \mathrm{O}_2$$

Question 1

Which of the following best describes the overall chemical reaction for photosynthesis?

Accepted Answer

$$6 \ \mathrm{CO}_2 + 6 \ \mathrm{H}_2O + 	ext{light energy} ightarrow \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6 \ \mathrm{O}_2$$

Question 2

What is the primary function of the light-capturing reactions in photosynthesis?

Accepted Answer

To split water molecules and generate ATP and NADPH

Question 3

Which molecule acts as the final electron acceptor in the light-capturing reactions of photosynthesis?

Accepted Answer

NADP$$^+$$

Question 4

During the Calvin cycle, what is the main role of ATP and NADPH?

Accepted Answer

They provide energy and electrons to reduce CO$$_2 to $$sugar

Question 5

Which of the following statements about autotrophs is correct?

Accepted Answer

They produce their own food using inorganic molecules and sunlight

Question 6

What is the main by-product of the light-capturing reactions in photosynthesis?

Accepted Answer

O$$_2$$

Question 7

Which process in photosynthesis is directly responsible for the release of oxygen gas?

Accepted Answer

Splitting of water during the light-capturing reactions

Question 8

A plant is exposed to a chemical that blocks the regeneration of NADP$$^+. $$What is the most immediate effect on photosynthesis?

Accepted Answer

The light-capturing reactions will stop because electrons cannot be transferred to NADP$$^+$$

Question 9

Which of the following best explains why photosynthesis is considered the opposite of cellular respiration?

Accepted Answer

Photosynthesis stores energy in glucose, while cellular respiration releases energy from glucose

Question 10

Which of the following is a correct sequence of events in the noncyclic electron flow of photosynthesis?

Accepted Answer

Photosystem II absorbs light, water is split, electrons move through the electron transport chain, NADP$$^+ is $$reduced to NADPH

Question 11

If a plant is placed in an environment with no light, which of the following processes will immediately stop?

Accepted Answer

Light-capturing reactions

Question 12

Which of the following best describes the role of water in the light-capturing reactions?

Accepted Answer

It donates electrons that are excited by light energy

Question 13

A mutation prevents a plant from producing ATP synthase in the thylakoid membrane. What is the most likely consequence?

Accepted Answer

The plant will be unable to produce ATP during the light-capturing reactions

Question 14

Which of the following is NOT a product of the light-capturing reactions?

Accepted Answer

Glucose

Question 15

Which statement best explains why heterotrophs depend on autotrophs for survival?

Accepted Answer

Heterotrophs rely on autotrophs to produce organic molecules through photosynthesis

Question 16

Which of the following best describes the relationship between the light-capturing reactions and the Calvin cycle?

Accepted Answer

The light-capturing reactions provide ATP and NADPH for the Calvin cycle

Chapter 10: Photosynthesis – Harnessing Sunlight to Make Carbohydrates

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