Question 1

Your friend Bill says that all food on Earth ultimately comes from photosynthesis. Your friend Tom disagrees, saying that, "Cows and pigs don't photosynthesize, and they are food." Who do you think is correct, and why?

Accepted Answer

Bill is correct. Without photo...

Question 2

How many carbon dioxide molecules are required to make one molecule of glucose?

Accepted Answer

A)   two
B)   three
C)   six
D)   eightE) A) and D)
F) A) and C)

Question 3

In the cycling of energy and carbon through living things, plants and some other organisms use CO2 to make carbon-containing molecules, while other organisms break down those molecules and release CO2. During this process, CO2 is produced during ________ and used during ________.

Accepted Answer

A)   cellular respiration; photosynthesis
B)   cellular respiration; photosynthesis and cellular respiration
C)   photosynthesis; cellular respiration
D)   photosynthesis; photosynthesis
E)   cellular respiration; cellular respirationF) A) and B)
G) A) and C)

Question 4

What function does sunlight perform in photosynthesis?

Accepted Answer

A)   Sunlight excites electrons in chlorophyll to a higher energy level.
B)   Sunlight fixes the CO2 into glucose.
C)   Sunlight converts electrons in chlorophyll to a lower energy state.
D)   Sunlight converts electrons in water to a lower energy state.
E)   Sunlight excites electrons in water to a higher energy level.F) A) and B)
G) C) and E)

Question 5

Sugars are created during:

Accepted Answer

A)   aerobic respiration.
B)   the Calvin cycle of photosynthesis.
C)   the light reactions of photosynthesis.
D)   anaerobic respiration.E) All of the above
F) A) and B)

Question 6

The splitting of water in photosynthesis provides:

Accepted Answer

A)   CO2 and electrons.
B)   O2 and electrons.
C)   glucose and electrons.
D)   hydrogen ions and light energy.E) A) and B)
F) A) and C)

Question 7

Which of the following statements about photosynthesis is false?

Accepted Answer

A)   Sunlight excites electrons from chlorophyll, which are captured by ATP.
B)   In the light reactions, electrons eventually wind up on NADPH.
C)   Photosynthesis involves many redox reactions similar to the electron transport chain used during cellular respiration.
D)   During the light reactions, ATP and NADPH are synthesized.
E)   A waste product of the light reactions is O2.F) B) and D)
G) B) and E)

Question 8

________ permit CO2 to enter the leaf and O2 to escape.

Accepted Answer

A)   Mesophyll cells
B)   Thylakoids
C)   Stomata
D)   ChloroplastsE) None of the above
F) All of the above

Question 9

The oxygen produced during photosynthesis comes from:

Accepted Answer

A)   water.
B)   carbohydrates.
C)   carbon dioxide.
D)   the air plants take in.E) None of the above
F) A) and B)

Question 10

If you see a red leaf, what color(s)  of light in the visible light spectrum is/are being reflected?

Accepted Answer

A)   red
B)   all colors except red
C)   all colors
D)   no colorsE) A) and C)
F) A) and D)

Question 11

Match the following.
A) mesophyll
B) grana
C) stomata
D) stroma
E) thylakoids
-These allow carbon dioxide to enter the leaf and oxygen to exit

Accepted Answer

The answer of Match the following.
A) mesophyll
B) grana
C) stomata
D) stroma
E)...

Question 12

Which of the following is a CAM plant?

Accepted Answer

A)   lilac
B)   cactus
C)   sugarcane
D)   pine tree
E)   cornF) B) and E)
G) A) and B)

Question 13

The purpose of chlorophyll is to:

Accepted Answer

A)   absorb light.
B)   let CO2 enter the plant.
C)   make ATP.
D)   make NADPH.E) A) and B)
F) B) and C)

Question 14

What two colors of light drive most of photosynthesis?

Accepted Answer

A)   red and green
B)   blue and green
C)   red and blue
D)   green and yellow
E)   red and yellowF) B) and D)
G) A) and C)

Question 15

Chlorophyll is found in which part of the plant cell?

Accepted Answer

A)   stroma
B)   cytoplasm
C)   thylakoid
D)   plasma membraneE) A) and B)
F) None of the above

Question 16

Photosynthesis forms ATP using oxidation-reduction reactions similar to those seen in the electron transport chain of respiration.

Accepted Answer

A) True 
 B)False

Question 17

The absorption of light energy by a photosystem:

Accepted Answer

A)   transfers an electron from a reaction center to accessory pigment molecules.
B)   causes electrons to be transferred from NADP+ to a reaction center.
C)   boosts electrons to a higher energy level.
D)   causes electrons to lose energy until they reach the reaction center.E) A) and C)
F) A) and B)

Question 18

As a by-product of photosynthesis, what percentage of the Earth's atmosphere is oxygen?

Accepted Answer

A)   31 percent
B)   41 percent
C)   21 percent
D)   10 percent
E)   50 percentF) B) and E)
G) None of the above

Question 19

The electrons excited by sunlight in photosystem I are replaced by ________, and the electrons excited by sunlight in photosystem II are replaced by ________.

Accepted Answer

A)   electrons from water; electrons from photosystem I
B)   electrons from water; electrons from carbon dioxide
C)   electrons from water; electrons from water
D)   electrons from carbon dioxide; electrons from water
E)   electrons from photosystem II; electrons from waterF) A) and B)
G) B) and C)

Question 20

Match the following.
A) mesophyll
B) grana
C) stomata
D) stroma
E) thylakoids
-The Calvin cycle takes place in this space

Accepted Answer

The answer of Match the following.
A) mesophyll
B) grana
C) stomata
D) stroma
E)...

Exam 8: The Green Worlds Gift: Photosynthesis

What function does sunlight perform in photosynthesis?

Correct AnswerverifiedShow Answer

Chlorophyll is found in which part of the plant cell?

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If you see a red leaf, what color(s) of light in the visible light spectrum is/are being reflected?

Correct AnswerverifiedShow Answer

The absorption of light energy by a photosystem:

Correct AnswerverifiedShow Answer

Match the following. A) mesophyll B) grana C) stomata D) stroma E) thylakoids -The Calvin cycle takes place in this space

Correct AnswerverifiedShow Answer

Which of the following is a CAM plant?

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The electrons excited by sunlight in photosystem I are replaced by ________, and the electrons excited by sunlight in photosystem II are replaced by ________.

Correct AnswerverifiedShow Answer

The splitting of water in photosynthesis provides:

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The oxygen produced during photosynthesis comes from:

Correct AnswerverifiedShow Answer

Photosynthesis forms ATP using oxidation-reduction reactions similar to those seen in the electron transport chain of respiration.

Correct AnswerverifiedShow Answer

As a by-product of photosynthesis, what percentage of the Earth's atmosphere is oxygen?

Correct AnswerverifiedShow Answer

________ permit CO2 to enter the leaf and O2 to escape.

Correct AnswerverifiedShow Answer

The purpose of chlorophyll is to:

Correct AnswerverifiedShow Answer

In the cycling of energy and carbon through living things, plants and some other organisms use CO2 to make carbon-containing molecules, while other organisms break down those molecules and release CO2. During this process, CO2 is produced during ________ and used during ________.

Correct AnswerverifiedShow Answer

How many carbon dioxide molecules are required to make one molecule of glucose?

Correct AnswerverifiedShow Answer

Your friend Bill says that all food on Earth ultimately comes from photosynthesis. Your friend Tom disagrees, saying that, "Cows and pigs don't photosynthesize, and they are food." Who do you think is correct, and why?

Correct AnswerverifiedBill is correct. Without photo...View AnswerShow Answer

Sugars are created during:

Correct AnswerverifiedShow Answer

Which of the following statements about photosynthesis is false?

Correct AnswerverifiedShow Answer

Match the following. A) mesophyll B) grana C) stomata D) stroma E) thylakoids -These allow carbon dioxide to enter the leaf and oxygen to exit

Correct AnswerverifiedShow Answer

What two colors of light drive most of photosynthesis?

Correct AnswerverifiedShow Answer

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The electrons excited by sunlight in photosystem I are replaced by , and the electrons excited by sunlight in photosystem II are replaced by .

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________ permit CO₂ to enter the leaf and O₂ to escape.

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In the cycling of energy and carbon through living things, plants and some other organisms use CO₂ to make carbon-containing molecules, while other organisms break down those molecules and release CO₂. During this process, CO₂ is produced during and used during .

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Bill is correct. Without photo...
View Answer

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