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

It synthesizes ATP from ADP and inorganic phosphate ($$\text{ADP} + \text{P}_i \rightarrow \text{ATP}).$$

Question 1

Which term best describes organisms that can produce their own food using sunlight, as shown in the image?

Accepted Answer

Photoautotroph

Question 2

Based on the image, which molecule is the primary product of photosynthesis that stores energy for the plant?

Accepted Answer

Glucose

Question 3

Which equation correctly represents the overall process of photosynthesis depicted in the image?

Accepted Answer

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

Question 4

In the process shown, which molecule is the source of the oxygen released by the plant?

Accepted Answer

Water

Question 5

Which part of the leaf is primarily responsible for absorbing sunlight for photosynthesis?

Accepted Answer

Palisade mesophyll

Question 6

What is the main function of the stomata in the leaf, as related to the process shown?

Accepted Answer

Exchanging gases (CO$$_2 in$$, O$$_2$$ out)

Question 7

Which pigment is most responsible for the green color of leaves and the absorption of light energy?

Accepted Answer

Chlorophyll

Question 8

Why do plants appear green to our eyes?

Accepted Answer

They reflect green light and absorb red and blue light.

Question 9

Which process in the leaf generates ATP and NADPH during photosynthesis?

Accepted Answer

Light reactions

Question 10

Where in the chloroplast do the light reactions of photosynthesis occur?

Accepted Answer

Thylakoid membrane

Question 11

Which molecule acts as an electron carrier during the light reactions?

Accepted Answer

NADPH

Question 12

What is the primary purpose of the Calvin cycle in photosynthesis?

Accepted Answer

To synthesize glucose from CO$$_2$$

Question 13

Which factor would most likely limit the rate of photosynthesis in a plant?

Accepted Answer

Low carbon dioxide concentration

Question 14

How does deforestation impact the process of photosynthesis and climate change?

Accepted Answer

It decreases the amount of CO$$_2$$ removed from the atmosphere, contributing to global warming.

Question 15

Which of the following best describes a redox reaction in photosynthesis?

Accepted Answer

Carbon dioxide is reduced to glucose.

Question 16

What is the role of ATP synthase in the light reactions of photosynthesis?

Accepted Answer

It synthesizes ATP from ADP and inorganic phosphate ($$	ext{ADP} + 	ext{P}_i ightarrow 	ext{ATP}).$$

Question 17

During the light reactions, what creates the electrochemical gradient necessary for ATP synthesis?

Accepted Answer

Pumping of hydrogen ions (H$$^+) $$into the thylakoid space

Question 18

Which enzyme is responsible for carbon fixation in the Calvin cycle?

Accepted Answer

Rubisco

Question 19

If a plant is exposed to only green light, what would most likely happen to its rate of photosynthesis?

Accepted Answer

It would decrease because green light is mostly reflected.

Question 20

Which of the following is a direct product of the Calvin cycle?

Accepted Answer

Glucose (or G3P)

Photosynthesis: Structure, Function, and Limiting Factors

Study Guide - Practice Questions