Question 1

Which of the following statements best describes the role of chloroplasts in photosynthesis?

Accepted Answer

Chloroplasts are organelles in plant cells where photosynthesis occurs, converting light energy into organic molecules.

Question 2

During the light reactions of photosynthesis, which molecule acts as the final electron acceptor?

Accepted Answer

NADP$$^+$$

Question 3

Which equation correctly represents the overall process of photosynthesis?

Accepted Answer

$$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6$ + 6O_2$$

Question 4

A plant is exposed to only green light. What is the most likely effect on its rate of photosynthesis?

Accepted Answer

The rate of photosynthesis will decrease because chlorophyll reflects green light.

Question 5

Which statement best explains why ATP and NADPH are required for the Calvin cycle?

Accepted Answer

They provide the energy and electrons needed to reduce CO$$_2 to $$sugar.

Question 6

Which of the following is a correct description of an anabolic pathway?

Accepted Answer

An anabolic pathway builds complex molecules, requires energy, and is endergonic.

Question 7

Which pigment is primarily responsible for absorbing light energy during photosynthesis in plants?

Accepted Answer

Chlorophyll a

Question 8

Why do plants appear green to the human eye?

Accepted Answer

Chlorophyll reflects green light and absorbs blue and red light.

Question 9

Which of the following best describes the function of stomata in plant leaves?

Accepted Answer

Stomata are pores that allow CO$$_2 to $$enter and O$$_2 to $$exit the leaf.

Question 10

Which of the following is a real-world application of photosynthetic algae?

Accepted Answer

Algae are used to produce biodiesel by converting carbon dioxide into organic molecules.

Question 11

Which statement correctly describes the relationship between autotrophs and heterotrophs?

Accepted Answer

Heterotrophs depend on autotrophs for food and oxygen.

Question 12

Which of the following wavelengths of light is most effective for photosynthesis in plants?

Accepted Answer

Blue light (400–450 nm)

Question 13

A scientist uses a spectrophotometer to measure the absorption of light by chlorophyll. What would be the expected result?

Accepted Answer

High absorption in the blue and red regions and low absorption in the green region.

Question 14

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

Accepted Answer

Splitting of water molecules during the light reactions

Question 15

Which of the following best explains why the Calvin cycle is considered an anabolic pathway?

Accepted Answer

It uses energy from ATP and NADPH to build sugars from CO$$_2.$$

Question 16

Which of the following is true about the absorption spectrum of chlorophyll a?

Accepted Answer

It absorbs light most strongly in the blue (400–450 nm) and red (640–700 nm) regions.

Question 17

Which of the following best describes the role of NADPH in photosynthesis?

Accepted Answer

NADPH acts as an electron donor in the Calvin cycle, helping to reduce CO$$_2 to $$sugar.

Question 18

Which of the following is a correct statement about the interdependence of photosynthesis and cellular respiration?

Accepted Answer

Photosynthesis produces oxygen and organic molecules, which are used in cellular respiration.

Question 19

A plant cell is placed in an environment with only red light (peak at 660 nm). What is the expected effect on photosynthesis?

Accepted Answer

Photosynthesis will proceed efficiently because chlorophyll absorbs red light strongly.

Chapter 10: Study Guide

Guida di studio - Domande di pratica