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Photosynthesis in Plants Answers

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1
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Which of the following is required for photosynthesis to take place?

A
sugar
B
oxygen
C
ATP
D
water
2
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The _______ in plants is directly responsible for absorbing light energy.

A
stroma
B
thylakoid
C
grana
D
chlorophyll
3

Photosynthesis occurs when _______.

A
plants absorb energy from carbon dioxide
B
plants absorb energy from sunlight
C
oxygen concentration in the atmosphere increases
D
all of the above
4

Dark reactions require energy to proceed, while light reactions do not.

A
T
B
F
5

Which type of carbon fixation stores carbon dioxide in acid form?

A
C3
B
C4
C
CAM
D
all of the above
6

Which of the following is a product of photosynthesis?

A
sugar
B
carbon dioxide
C
water
D
light
7

The dense fluid in chloroplasts where carbon dioxide is converted to sugar is called the _______.

A
thylakoid
B
stroma
C
grana
D
stomata
8

How does the carbon dioxide necessary for photosynthesis enter plants?

A
through their roots
B
through openings in the leaves called stomata
C
the plants produce their own complete supply
D
none of the above
9

What is the main difference between C3 and C4 carbon fixation?

A
In C3 carbon fixation, plant stomata are open during the day, while they are open at night for C4 carbon fixation.
B
C3 processes take place throughout the leaf, while C4 processes take place in the inner cells.
C
C3 carbon fixation is more common in areas with high light intensity than C4 carbon fixation.
D
C3 processes are more efficient than C4 processes in high temperatures.
10

Which of the following types of carbon fixation occurs in most plants?

A
C3
B
C4
C
CAM
D
none of the above
11

Carbon fixation occurs during the light reactions.

A
T
B
F
12

Photosynthesis is vital for maintaining levels of atmospheric oxygen.

A
T
B
F
13

Which of the following is not necessary for a plant to carry out photosynthesis?

A
carbon dioxide
B
water
C
oxygen
D
sunlight
14

What is the main difference between C3 and C4 carbon fixation?

A
In C3 carbon fixation, plant stomata are open during the day, while they are open at night for C4 carbon fixation.
B
C3 processes take place throughout the leaf, while C4 processes take place in the inner cells.
C
C3 carbon fixation is more common in areas with high light intensity than C4 carbon fixation.
D
C3 processes are more efficient than C4 processes in high temperatures.
15

Different types of plants use different types of carbon fixation as adaptations to varying conditions.

A
T
B
F
16

Which of the following is an output of photosynthesis?

A
oxygen
B
carbon dioxide
C
water
D
nutrients
17

Photosynthesis occurs when _______.

A
plants absorb energy from carbon dioxide
B
plants absorb energy from sunlight
C
oxygen concentration in the atmosphere increases
D
all of the above
18

Carbon fixation occurs during the light reactions.

A
T
B
F
19

Why is photosynthesis vital for life?

A
Photosynthesis helps maintain atmospheric levels of oxygen and carbon dioxide.
B
Photosynthesis is a direct means of energy production for many organisms.
C
Photosynthesis is an indirect means of energy production for many organisms.
D
All of the above
20

Photosynthesis is vital for maintaining levels of atmospheric oxygen.

A
T
B
F

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