Question 1

Which of the following best describes the importance of photoautotrophs to the biosphere?

Accepted Answer

They provide oxygen and organic molecules that sustain most life forms.

Question 2

What is the correct summary equation for photosynthesis?

Accepted Answer

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

Question 3

In the photosynthesis reaction, which molecule is reduced?

Accepted Answer

Carbon dioxide ($$CO_2)$$

Question 4

Which of the following is oxidized during photosynthesis?

Accepted Answer

Water ($$H_2O)$$

Question 5

Which structure in a leaf is primarily responsible for gas exchange?

Accepted Answer

Stomata

Question 6

Which component of the chloroplast contains the photosynthetic pigments?

Accepted Answer

Thylakoid membrane

Question 7

Which of the following best describes the relationship between wavelength and energy in the electromagnetic spectrum?

Accepted Answer

Shorter wavelengths have higher energy.

Question 8

If a pigment absorbs light most strongly at 450 nm, what color does it appear to the human eye?

Accepted Answer

Orange

Question 9

Which pigment is considered the primary photosynthetic pigment in plants?

Accepted Answer

Chlorophyll a

Question 10

A graph shows the absorbance of light by chlorophyll a and carotenoids. If chlorophyll a absorbs maximally at 680 nm and carotenoids at 480 nm, which pigment is most effective at capturing red light?

Accepted Answer

Chlorophyll a

Question 11

Which of the following is NOT a product of the photosynthesis reaction?

Accepted Answer

Carbon dioxide ($$CO_2)$$

Question 12

Which leaf structure is most directly involved in controlling water loss?

Accepted Answer

Stomata

Question 13

If a plant is exposed only to green light, what is the expected effect on its rate of photosynthesis?

Accepted Answer

It will decrease because green light is poorly absorbed.

Question 14

Which of the following correctly matches a pigment with its absorption characteristics?

Accepted Answer

Chlorophyll b: absorbs blue and orange light

Question 15

Which part of the electromagnetic spectrum is most important for photosynthesis?

Accepted Answer

Visible light

Question 16

A leaf sample is tested and found to have a high concentration of chlorophyll b. What color would you expect the leaf to appear?

Accepted Answer

Green

Question 17

Which of the following is a correct statement about the structure of a chloroplast?

Accepted Answer

The stroma contains stacks of thylakoids called grana.

Question 18

If the stomata of a plant leaf are closed during the day, what is the most likely consequence?

Accepted Answer

Reduced water loss but decreased CO$$_2$$ uptake.

Question 19

Which of the following best explains why plants appear green?

Accepted Answer

They reflect green light and absorb red and blue light.

Question 20

A scientist measures the rate of photosynthesis in a leaf under different wavelengths of light. The highest rate is observed at 680 nm. Which pigment is most likely responsible for this peak?

Accepted Answer

Chlorophyll a

Photosynthesis and Related Concepts: Study Guide

Guida di studio - Domande di pratica

Study guide - Flashcard