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Calvin Cycle CFU

Total questions: 90

Worksheet time: 51mins

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.

5 carbon sugar that combines with CO2 in the Calvin Cycle

a)

3-PGA

b)

G3P

c)

RuBP

d)

Glucose

5.

The Calvin Cycle occurs in the

a)

Thylakoid

b)

Grana

c)

Inner membrane of chloroplast

d)

Stroma

6.
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
7.
The 5-Carbon molecules that the Calvin Cycle starts and ends with, is called _____________.
a)
PGA
b)
G3P
c)
RuBP
d)
RuDp
8.
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
9.
The CO2 used in the Calvin Cycle originates from ___________.
a)
The light phase
b)
The breakdown of the remaining G3P's
c)
Diffusion through the stoma
d)
Lumen of the Thylakoid
10.
True or False: The Calvin Cycle returns ADP and NADP to the light dependent phase.
a)
True
b)
False
11.
The enzyme responsible for Carbon Fixation in C3 Photosynthesis is
a)
RuBisCo
b)
PEP Carboxylase
c)
Hexokinase
d)
Pyruvate DeHydrogenase
12.
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
13.
The first molecule formed after CO2 is added to the Calvin Cycle is:
a)
RuBP
b)
G3P
c)

PGA

d)

Rubisco

14.
Which of the following molecules is not needed for the Calvin Cycle?
a)
CO2
b)
ATP
c)
NADPH
d)
H2O
15.

What is the main product of the Calvin Cycle?

a)

Stroma

b)

Thylakoids

c)

Glucose

d)

Water

16.
How many G3P molecules make one molecule of glucose? 
a)
1
b)
2
c)
3
d)
4
17.
What happens to the remaining 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. 
18.
How many carbons does G3P have?
a)
1
b)
2
c)
3
d)
6
19.

Calvin Cycle can occur without ATP

a)

True

b)

False

20.

What does the Calvin Cycle begins with?

a)

Glucose

b)

The input of CO2

c)

Water

d)

ATP synthase

21.

Tiny pores on the underside of leaves

a)

Stroma

b)

Stomata

c)

Thylakoids

d)

Chloroplasts

22.

The six carbon sugar initially made in the Calvin Cycle is unstable and breaks into two molecules of

a)

ATP

b)

G3P

c)

RuBP

d)

3-PGA

23.

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

24.
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
25.
What does NADPH do? 
a)
carries electrons to the Calvin cycle
b)
carries electrons to the ETC
26.
How many G3P molecules make one molecule of glucose? 
a)
1
b)
2
c)
3
d)
4
27.

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.

28.

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

a)

NADPH

b)

ATP

c)

Oxygen

d)

Carbon dioxide

29.

What fixes carbon?

a)

Rubisco

b)

Photosystem I

c)

Photosystem II

d)

Water

30.

The stroma is found

a)

on the underside of leaves

b)

within the chloroplast

c)

in animal cells

d)

inside the thylakoids

31.

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

32.

The end product of Calvin cycle is

a)

3-carbon sugars

b)

water

c)

carbon dioxide

d)

stroma

33.

Carbon dioxide gas can enter a plant leaf through

a)

stroma

b)

stomata

c)

plant pores

d)

thylakoid

34.

Some of the 3-carbon sugars will be used by plants to produce

a)

light energy to photosynthesis keeps happening.

b)

their own source of water.

c)

glucose, starch, and other plant building materials

d)

newer, more dynamic mutualistic relationships

35.

Some of the 3-carbon sugars made during the Calvin cycle will be used to produce __________.

a)

C6H12O6

b)

starch

c)

glucose and other sugars

d)

all of these

36.

The majority of the mass of a plant comes from

a)

water

b)

carbon dioxide

c)

oxygen gas

d)

light

37.

The products of the Calvin cycle include

a)

carbon dioxide, oxygen gas, and organic compounds.

b)

water, oxygen gas, ATP and NADPH

c)

carbon dioxide and water

d)

organic compounds, ADP, and NADP+

38.

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

39.
What does carbon combine with to form glucose? 
a)
NADPH
b)
ATP
c)
RuBP
d)
G3P
40.
How many G3P molecules make one molecule of glucose? 
a)
1
b)
2
c)
3
d)
4
41.

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

a)

thylakoid membrane

b)

lumen

c)

stroma

42.
What does NADPH do? 
a)
carries electrons to the Calvin cycle
b)
carries electrons to the ETC
43.
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
44.

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.

45.
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
46.

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

a)

NADPH

b)

ATP

c)

Oxygen

d)

Carbon dioxide

47.

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

a)

NADP+

b)

NADPH

c)

ADP

d)

G3P (to form glucose)

48.
What is made during the light independent reactions?
a)
ATP
b)
NADPH
c)
sugar
d)
fat
49.
TRUE or FALSE.  The Calvin Cycle can happen during the day.
a)
True
b)
false
50.
To bring in nonliving carbon (CO2) and use it to make organic compounds is a process called _______________.
a)
carbon fixiation
b)
cellular respiration
c)
catabolic reactions
d)
mitosis
51.
What is the product of the Calvin Cycle?
a)
Rubisco
b)
Glyceraldehyde 3-Phosphate (G3P)
c)
Oxygen
d)
Starch
52.
Which enzyme joins CO2 and RuBP?
a)
NADP+ reductase
b)
rubisco
c)
ATP synthase
53.
Where do NADP+ and ADP produced in the Calvin cycle go? 
a)
Back to the light reactions
b)
out of the chloroplast
54.

In the Calvin Cycle, carbohydrate molecules are (Hint: are they gaining or loosing H+/electrons):

a)

Reduced

b)

Oxidized

55.

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

a)

CO2

b)

ATP

c)

NADPH

d)

H2O

56.

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

57.
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
58.
Gel-like material that fills the space of the chloroplast is the
a)
stroma
b)
thylakoids
c)
cytoplasm
d)
mitochondria
59.
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
60.
When carbon first enters the Calvin cycle, what molecule does it combine with? 
a)
PGA
b)
G3P
c)
RuBP
d)
ATP
61.
What is the ultimate ORIGINAL source of energy for living things
a)
Sugar
b)
Sun
c)
Moon
d)
Carbon Dioxide
62.
Stacks of disk shapes that contain chlorophyll within the chloroplast are
a)
stroma
b)
mitochondria
c)
thylakoids
d)
ribosomes
63.
the light independent reaction takes place in the
a)
thylakoids
b)
mitochondria
c)
nucleua
d)
stroma
64.
The light dependent reaction takes place in the
a)
mitochondria
b)
thylakoids
c)
ribosomes
d)
stroma
65.
What gas does the process of photosynthesis release into the atmosphere?
a)
oxygen
b)
carbon dioxide
c)
water
d)
nitrogen
66.
The major atmospheric byproduct of photosynthesis is
a)
carbon dioxide
b)
oxygen
c)
water
d)
glucose
67.
What are the reactants of photosynthesis?
a)
carbon dioxide and oxygen
b)
water and oxygen
c)
carbon dioxide and water
d)
water and glucose
68.
What are the products of photosynthesis?
a)
water and carbon dioxide
b)
oxygen and glucose
c)
oxygen and carbon dioxide
d)
oxygen and water
69.
The purpose of the Electron Transport Chain is...
a)
To produce CO2
b)
To produce ATP
c)
To make glucose
d)
To make NADH
70.

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

71.

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

72.

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

73.
What is made during the light independent reactions?
a)
ATP
b)
NADPH
c)
sugar
d)
fat
74.

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

a)

NADPH

b)

ATP

c)

Oxygen

d)

Carbon dioxide

75.

The Calvin Cycle takes place in the:

a)

Stroma

b)

Thylakoid

c)

Grana

d)

Stomata

76.

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

a)

NADPH

b)

ATP

c)

Oxygen

d)

Carbon dioxide

77.

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

a)

NADP+

b)

NADPH

c)

ATP

d)

Water

e)

Carbon dioxide

78.
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
79.
Which of the following is NOT a reactant of the Calvin Cycle?
a)
NADPH
b)
ATP
c)
Oxygen
d)
Carbon dioxide
80.

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

a)

oxygen

b)

ATP

c)

sugar

81.

Which of the following is not a product of photosynthesis?

a)

carbon dioxide

b)

oxygen

c)

sugar

82.
Where does the light independent reaction take place?
a)
Matrix
b)
Stroma
c)
Thylakoid membrane
d)
Cytoplasm
83.
What provides the reducing power for the Calvin cycle?
a)
ATP
b)
ADP
c)
NADP
d)
NADPH2
84.
What provides the energy for the Calvin cycle?
a)
ATP
b)
ADP
c)
NADP
d)
NADPH2
85.
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
86.
Which of the following is NOT a reactant of the Calvin Cycle?
a)
NADPH
b)
ATP
c)
Oxygen
d)
Carbon dioxide
87.

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

88.

Bringing in inorganic carbon (CO2) to be incorporated as organic compounds is a process called _______________.

a)

carbon fixation

b)

cellular respiration

c)

catabolic reactions

d)

mitosis

89.
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
90.
What does NADPH do? 
a)
carries electrons to the Calvin cycle
b)
carries electrons to the ETC

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