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Calvin Cycle CFU

Total questions: 73

Worksheet time: 34mins

Name
Class
Date
1.

Main products of the Calvin Cycle

a)

Oxygen, NADP+, ADP

b)

Glucose, CO2, ADP

c)

ADP, NADP+, Glucose

d)

ATP, NADPH, Oxygen

2.

The Calvin Cycle occurs in the

a)

Thylakoid

b)

Grana

c)

Inner membrane of chloroplast

d)

Stroma

3.

Which of the following is true of the Calvin Cycle?

a)

carbon dioxide and energy (ATP and NADPH) are used to make organic compounds

b)

energy is absorbed from sunlight and converted to chemical energy stored in ATP and NADPH

c)

Occurs in the thylakoid

d)

Occurs in the cytoplasm

4.

The Calvin Cycle occurs in the

a)

Thylakoid

b)

Grana

c)

Inner membrane of chloroplast

d)

Stroma

5.
In the Calvin Cycle, ________ and ________ from the light dependent reactions convert PGA into G3P
a)
O2, ATP
b)
CO2, H2
c)
ADP, NADPH
d)
NADPH, ATP
6.
After 12 G3P molecules are created, 10 are used to regenerate _________, while the other 2 are used to create __________.
a)
RuBP, C6H12O6
b)
Glucose, CO2
c)
ATP, Glucose
d)
Glucose, RUBP
7.
The CO2 used in the Calvin Cycle originates from ___________.
a)

The light hitting the palisade mesophyll

b)
The breakdown of the remaining G3P's
c)

air entering through the stoma

d)
Lumen of the Thylakoid
8.

True or False: The Calvin Cycle returns ADP and NADP to the light dependent reactions.

a)
True
b)
False
9.
The molecule that comes out of the Calvin Cycle to produce glucose, and polymers like cellulose is:
a)
RuBP
b)
GP3
c)
3-PG
d)
G3P
10.
Which of the following molecules is not needed for the Calvin Cycle?
a)
CO2
b)
ATP
c)
NADPH
d)
H2O
11.

What is the main product of the Calvin Cycle?

a)

Stroma

b)

Thylakoids

c)

Glucose

d)

Water

12.
How many G3P molecules make one molecule of glucose? 
a)
1
b)
2
c)
3
d)
4
13.

What happens to the left over G3P molecules in the last step of the dark reactions?

a)
They are used to make glucose.
b)
They are reshuffled to make CO2 by adding ATP.
c)
They exit the cycle.
d)
They are reshuffled to make RuBP by adding ATP. 
14.
How many carbons does G3P have?
a)
1
b)
2
c)
3
d)
6
15.

Calvin Cycle can occur without ATP

a)

True

b)

False

16.

What does the Calvin Cycle begins with?

a)

Glucose

b)

The input of CO2

c)

Water

d)

ATP synthase

17.

Tiny pores on the underside of leaves

a)

Stroma

b)

Stomata

c)

Thylakoids

d)

Chloroplasts

18.

Plants can close their stomata when the temperature is hot

a)

To prevent water loss

b)

To prevent loss of oxygen

c)

To prevent loss of carbon dioxide

d)

To bring in more carbon dioxide

19.
In the Calvin Cycle, ________ and ________ from the light dependent reactions convert PGA into G3P
a)
O2, ATP
b)
CO2, H2
c)
ADP, NADPH
d)
NADPH, ATP
20.
What does NADPH do? 
a)
carries electrons to the Calvin cycle
b)
carries electrons to the ETC
21.
How many G3P molecules make one molecule of glucose? 
a)
1
b)
2
c)
3
d)
4
22.

What happens most of the G3P molecules in the last step of the dark reactions (Calvin cycle)?

a)

They are used to make glucose.

b)

They are reshuffled to make CO2 by adding ATP.

c)

They exit the cycle.

d)

They are reshuffled to make RuBP by adding ATP.

23.

Which of the following is NOT a reactant of the dark reactions (Calvin Cycle)?

a)

NADPH

b)

ATP

c)

Oxygen

d)

Carbon dioxide

24.

The stroma is found

a)

on the underside of leaves

b)

within the chloroplast

c)

in animal cells

d)

inside the thylakoids

25.

Calvin cycle is sometimes called the light-independent reactions because

a)

light is not required for the Calvin cycle to move forward

b)

light is required

c)

it is something animal cells do

d)

green light is absorbed during this step

26.

The end product of Calvin cycle is

a)

3-carbon sugars

b)

water

c)

carbon dioxide

d)

stroma

27.

Carbon dioxide gas can enter a plant leaf through

a)

stroma

b)

stomata

c)

plant pores

d)

thylakoid

28.

The majority of the mass of a plant comes from

a)

water

b)

carbon dioxide

c)

oxygen gas

d)

light

29.

The energy that drives the Calvin cycle is found in

a)

ATP and NADPH

b)

Glucose and 3-carbon sugars

c)

Stomata and cellulose

d)

water and carbon dioxide

30.
What does carbon combine with to form glucose? 
a)
NADPH
b)
ATP
c)
RuBP
d)
G3P
31.
How many G3P molecules make one molecule of glucose? 
a)
1
b)
2
c)
3
d)
4
32.

Where do the dark reactions (Calvin cycle) take place?

a)

thylakoid membrane

b)

lumen

c)

stroma

33.
What does NADPH do? 
a)
carries electrons to the Calvin cycle
b)
carries electrons to the ETC
34.
The two main stages of photosynthesis are the
a)
light reactions and respiration
b)
dark reactions and the Calvin cycle 
c)
light reactions and the Calvin cycle
d)
dark reactions and fermentation
35.

What happens most of the G3P molecules in the last step of the dark reactions (Calvin cycle)?

a)

They are used to make glucose.

b)

They are reshuffled to make CO2 by adding ATP.

c)

They exit the cycle.

d)

They are reshuffled to make RuBP by adding ATP.

36.
In green plants, the primary function of the Calvin cycle is to
a)
Use ATP to release carbon
b)
Split water to release oxygen.
c)
Construct simple sugars from carbon dioxide.
d)
Use NADPH to release carbon
37.

Which of the following is NOT a reactant of the dark reactions (Calvin Cycle)?

a)

NADPH

b)

ATP

c)

Oxygen

d)

Carbon dioxide

38.

Which of the following is NOT a product of the dark reactions?

a)

NADP+

b)

NADPH

c)

ADP

d)

G3P (to form glucose)

39.
What is made during the light independent reactions?
a)
ATP
b)
NADPH
c)
sugar
d)
fat
40.
Where do NADP+ and ADP produced in the Calvin cycle go? 
a)
Back to the light reactions
b)
out of the chloroplast
41.

Which of the following molecules is not needed directly for the Calvin Cycle?

a)

CO2

b)

ATP

c)

NADPH

d)

H2O

42.

What is the main purpose of the light reactions?

a)

To provide the energy and electrons for the calvin cycle

b)

To capture energy and make sugar

c)

To reflect green light

d)

To make sugars

43.
What is the function of NADPH and ATP?
a)
They absorb light
b)
They power the light-dependent reactions
c)
They are light-reflecting pigments
d)
They are short term energy carriers
44.
Gel-like material that fills the space of the chloroplast is the
a)
stroma
b)
thylakoids
c)
cytoplasm
d)
mitochondria
45.
The two main stages of photosynthesis are the
a)
light reactions and respiration
b)
dark reactions and the Calvin cycle 
c)
light reactions and the Calvin cycle
d)
dark reactions and fermentation
46.
What is the ultimate ORIGINAL source of energy for living things
a)
Sugar
b)
Sun
c)
Moon
d)
Carbon Dioxide
47.

Disk that contain chlorophyll within the chloroplast are

a)
stroma
b)
mitochondria
c)
thylakoids
d)
ribosomes
48.
the light independent reaction takes place in the
a)
thylakoids
b)
mitochondria
c)
nucleua
d)
stroma
49.
The light dependent reaction takes place in the
a)
mitochondria
b)
thylakoids
c)
ribosomes
d)
stroma
50.
What gas does the process of photosynthesis release into the atmosphere?
a)
oxygen
b)
carbon dioxide
c)
water
d)
nitrogen
51.
The major atmospheric byproduct of photosynthesis is
a)
carbon dioxide
b)
oxygen
c)
water
d)
glucose
52.
What are the reactants of photosynthesis?
a)
carbon dioxide and oxygen
b)
water and oxygen
c)
carbon dioxide and water
d)
water and glucose
53.
What are the products of photosynthesis?
a)
water and carbon dioxide
b)
oxygen and glucose
c)
oxygen and carbon dioxide
d)
oxygen and water
54.
The purpose of the Electron Transport Chain is...
a)
To produce CO2
b)
To produce ATP
c)
To make glucose
d)
To make NADH
55.

What does NADPH do?

a)

helps power the Calvin cycle

b)

carries electrons to the ETC

c)

helps split water

d)

helps with active transport

56.

What happens to NADPH and ATP after they are used in the Calvin Cycle?

a)

they recycle back to the Light Reaction

b)

they are used to for active transport in the ETC

c)

they pump H+ into the stroma

d)

stay in the thylakoid

57.

In green plants, the primary function of the Calvin cycle is to

a)

Use ATP to release carbon

b)

Split water to release oxygen.

c)

Construct sugar from carbon dioxide.

d)

Use NADPH to release carbon

58.
What is made during the light independent reactions?
a)
ATP
b)
NADPH
c)
sugar
d)
fat
59.

Which of the following is NOT a reactant/input of the Calvin Cycle?

a)

NADPH

b)

ATP

c)

Oxygen

d)

Carbon dioxide

60.

The Calvin Cycle takes place in the:

a)

Stroma

b)

Thylakoid

c)

Grana

d)

Stomata

61.

Which of the following is NOT a reactant/input of the Calvin Cycle

a)

NADPH

b)

ATP

c)

Oxygen

d)

Carbon dioxide

62.

Which of the following is NOT a product/output of the Calvin Cycle

a)

NADP+

b)

NADPH

c)

ATP

d)

Water

e)

Carbon dioxide

63.
The two main stages of photosynthesis are the
a)
light reactions and respiration
b)
dark reactions and the Calvin cycle 
c)
light reactions and the Calvin cycle
d)
dark reactions and fermentation
64.
Which of the following is NOT a reactant of the Calvin Cycle?
a)
NADPH
b)
ATP
c)
Oxygen
d)
Carbon dioxide
65.

Which of the following is not produced in the light reaction?

a)

oxygen

b)

ATP

c)

sugar

66.

Which of the following is not a product of photosynthesis?

a)

carbon dioxide

b)

oxygen

c)

sugar

67.
Where does the light independent reaction take place?
a)
Matrix
b)
Stroma
c)
Thylakoid membrane
d)
Cytoplasm
68.
What provides the energy for the Calvin cycle?
a)
ATP
b)
ADP
c)
NADP
d)
NADPH2
69.
What happens to NADPH and ATP after they are used in the Calvin Cycle?
a)
they recycle back to the light reactions
b)
they are used to make G3P
70.
Which of the following is NOT a reactant of the Calvin Cycle?
a)
NADPH
b)
ATP
c)
Oxygen
d)
Carbon dioxide
71.

In green plants, the primary function of the Calvin cycle is to

a)

Use ATP to release carbon

b)

Split water to release oxygen.

c)

Construct sugar from carbon dioxide.

d)

Use NADPH to release carbon

72.
The two main stages of photosynthesis are the
a)
light reactions and respiration
b)
dark reactions and the Calvin cycle 
c)
light reactions and the Calvin cycle
d)
dark reactions and fermentation
73.
What does NADPH do? 
a)
carries electrons to the Calvin cycle
b)
carries electrons to the ETC

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