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

Question 1

Which of the following is the overall chemical equation for photosynthesis?

Accepted Answer

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

Question 2

During photosynthesis, which molecule is reduced?

Accepted Answer

Carbon dioxide

Question 3

What is the main product of photosynthesis?

Accepted Answer

Glucose

Question 4

Which structure in the leaf is primarily responsible for gas exchange with the atmosphere?

Accepted Answer

Stoma

Question 5

Which component of the electromagnetic spectrum is used by plants for photosynthesis?

Accepted Answer

Visible light

Question 6

A photon is an example of which type of energy?

Accepted Answer

Kinetic energy, high

Question 7

Which pigment does NOT absorb yellow/orange light (580–750 nm)?

Accepted Answer

Chlorophyll b

Question 8

What is the correct order of steps in the light reactions of photosynthesis?

Accepted Answer

Photosystem II, ETC, Photosystem I, NADP+ reduction, chemiosmosis

Question 9

Where in a plant cell does the Calvin cycle take place?

Accepted Answer

Stroma

Question 10

The enzyme Rubisco combines RuBP with a carbon atom from which molecule?

Accepted Answer

Carbon dioxide

Question 11

Which of the following processes occurs during the Calvin cycle?

Accepted Answer

Regeneration of RuBP

Question 12

What is the primary function of the light reactions of photosynthesis?

Accepted Answer

Production of NADPH and ATP

Question 13

Plants are more likely to use photorespiration instead of the Calvin cycle when:

Accepted Answer

Stomata remain closed and O$$_2$$ concentrations within the plant are high

Question 14

A plant that opens its stomata only at night is a:

Accepted Answer

CAM plant

Question 15

Which of the following is a key difference between C$$_3$$, C$$_4$$, and CAM plants?

Accepted Answer

C$$_3$$ plants fix carbon in mesophyll cells, C$$_4$$ plants fix carbon in bundle sheath cells, CAM plants fix carbon at night

Question 16

Which of the following is NOT a similarity between the light reactions of photosynthesis and the electron transport chain in cellular respiration?

Accepted Answer

Both have the goal of creating energy-storing molecules such as ATP

Question 17

What is the main energy source that powers photosynthesis and ultimately cellular respiration?

Accepted Answer

The sun

Question 18

Why is the absorption spectrum for chlorophyll a different from the action spectrum for photosynthesis?

Accepted Answer

Accessory pigments absorb light in addition to chlorophyll a, broadening the range of light used in photosynthesis

Question 19

During the light reactions, the primary function of photosystem II is to:

Accepted Answer

Oxidize H$$_2O $$and generate ATP

Photosynthesis: Structure, Function, and Mechanisms (Campbell Biology Ch. 10 Study Guide)

Study Guide - Practice Questions