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AP Bio Photosynthesis Review

Total questions: 120

Worksheet time: 2hrs 21mins

Name
Class
Date
1.
The O2 released during photosynthesis comes from   .
a)
CO2
b)
H2O
c)
NADPH
d)
RuBP
2.
Which of the following is an important difference between light-dependent and light-independent reactions of photosynthesis?
a)
The light-dependent reactions occur only during the day; the light-independent reactions occur only during the night.
b)
The light-dependent reactions occur in the cytoplasm; the light-independent reactions occur in chloroplasts.
c)
The light-dependent reactions utilize CO2 and H2O; the light-independent reactions produce CO2 and H2O.
d)
The light-dependent reactions produce ATP and NADPH2; the light-independent reactions use energy stored in ATP and NADPH.
3.
The single, flattened structure is called a
a)
Stroma
b)
Pigment
c)
Thylakoid
d)
Chloroplast
4.
The end products of the light-dependent reactions of photosynthesis are   .
a)
ADP, H2O, NADPH2
b)
ADP, PGAL, RuBP 
c)
ATP, CO2, H2O
d)
ATP, NADPH2, O2
5.
The diagram shows photosystems II and I. What is a major event that occurs when matter and energy moves through photosystem II?
a)
ATP is synthesized
b)
Water molecules are split
c)
Chlorophyll is produced
d)
CO2 is used
6.
The most important role of pigments in photosynthesis is to _____.
a)
capture light energy
b)
screen out harmful ultraviolet rays
c)
store energy in glucose molecules
d)
 release energy from glucose molecules
7.
Chlorophyll molecules are in which part of the chloroplast?
a)
grana stacks
b)
stroma
c)
stomata
d)
plasma membrane
8.
  Light reactions do all of the following EXCEPT _____.
a)
convert sunlight to chemical energy
b)
synthesize ATP and NADPH2
c)
reduce CO2
d)
convey excited electrons from chlorophyll to an electron acceptor (NADPH2)
9.
The energy required to run the light-independent reactions of photosynthesis comes from which two substances produced during the light-dependent reactions?
a)
ATP and NADPH2
b)
ADP and PO4
c)
H+ and O2
d)
O2 and ATP
10.
What is an end product of this reaction?
a)
Chlorophyll A and B
b)
H2O
c)
CO2
d)
A glucose molecule
11.
What is the correct equation for photosynthesis?
a)
C6H12O6 + 6O2 --> 6CO2 + 6H2O
b)
6CO2 + 6O2 --> C6H12O6  + 6H2O
c)
 6CO2 + 6O2 --> 6H2O + C6H12O6
d)
6CO2 + 6H2O  -->  6O2 + C6H12O6
12.
What do the carbon reactions produce?
a)
O2, H2O, CO2
b)
ATP, Glucose, H2O
c)
NADPH, ATP, O2
d)
Glucose, NADP+, ADP + P
13.
What do the light reactions produce?
a)
ATP, NADPH, O2
b)
H2O, O2, Glucose
c)
NADP+, ADP + P, O2
d)
NADPH, H2O, ATP
14.
What leaf structure prevents water loss?
a)
spongy mesophyll
b)
cuticle
c)
stoma
d)
phloem
15.
What can change shape to open and close the stoma?
a)
guard cells
b)
xylem
c)
phloem
d)
vascular bundle
16.
After sugars are formed in photosynthesis, what structure do they travel through to reach the fruits of the plant?
a)
xylem
b)
cuticle
c)
phloem
d)
roots
17.
What type of solutions would cause a guard cell to open?
a)
hypotonic
b)
hypertonic
18.

What group of pigments in deciduous trees break down later in the year and give leaves their orange, red, and yellow colors?

a)
carotenoids
b)
chlorophyll a
c)
chlorophyll b
d)
rhodopsin
19.
What color of light provides the most energy to a plant?
a)
orange
b)
red
c)
blue
d)
green
20.
What color of light reflects off of chlorophyll?
a)
orange
b)
red
c)
blue
d)
green
21.
Where do the light reactions take place inside a chloroplast?
a)
stroma
b)
lamellae
c)
chloroplast membrane
d)
thylakoid membrane
22.

What is produced in the stroma?

a)

ATP

b)

glucose/G3P

c)

O2

d)

CO2

23.

How do C4 plants prevent photorespiration?

a)

they close the stomata during the day

b)

they fix CO2 during the night

c)

they fix CO2 in a cell that does not contain RubisCO

d)

they fix CO2 in the guard cells

24.

Why do CAM plants grow much slower than other plants?

a)

they live in areas that do not have a lot of sunlight

b)

they live in areas that do not have a lot of water

c)

they can only fix CO2 during the night hours

d)

they can only fix CO2 during the day hours

25.

What enzyme fixes CO2 in C4 and CAM plants?

a)

ATP synthase

b)

rubisCO

c)

PEP carboxylase

d)

lactase

26.

In which Eukaryotic organelle does Photosynthesis take place?

a)

Chloroplast

b)

Mitochondira

c)

Vacuole

d)

Eukaryotes

27.

What is the original source of energy for living organisms?

a)

The sun

b)

The food we eat

c)

The soil

d)

Plants

28.

What are the "air holes" on the bottom of leaves that allow for gas and water vapor exchange?

a)

Stomata

b)

Chloroplast

c)

Chlorophyll

d)

Cell Membrane

29.

What could cause stomata to close?

a)

Needing to conserve water

b)

Because the plant is scared

30.

How do plants get the glucose they need for Cellular Respiration?

a)

By consuming carbohydrates

b)

By making it via photosynthesis

c)

Be sleeping

d)

By breathing

31.

What biomolecule is Glucose?

a)

Carbohydrates

b)

Nucleic Acids

c)

Proteins

d)

Lipids

32.

How many times does the average american undergo photosynthesis?

a)

9384638456348388437465748383765848

b)

24

c)

21

d)

0.00000000000000000000000

e)

Cabbage

33.
What is another name for glucose?
a)
Chlorophyll
b)
Chloroplasts
c)
Stomata
d)
Sugar
34.

2.The function accomplished by the light-dependent reactions is ______________.

a)

Energy and electron storage

b)

Sugar production

c)

Carbon fixation

d)

Conversion of sugar

35.

Where does dark reaction or light independent specifically occur?

a)

thylakoid membrane

b)

Stroma of the chloroplast

c)

Grana

d)

nuclear membrane

36.

Where does light dependent specifically occur?

a)

thylakoid membrane of the grana

b)

Stroma of the chloroplast

c)

mitochondria

d)

nuclear membrane

37.

What is NOT the product of light dependent reaction?

a)

ATP

b)

NADPH

c)

H2O

d)

O2

38.

Which of the following light color is absorbed by plants?

a)

Red

b)

Green

c)

yellow

d)

Light green

39.

Which of the following statements does not describe Light independent reaction?

a)

aka Calvin cycle

b)

Produce ATP and NADPH

c)

Produce glucose

d)

Occur in the stroma of the chloroplast

e)

Use ATP and NADPH for the reaction

40.

•An enzyme that fixes carbon from atmosphere to convert it to complex macromolecule glucose.

a)

RuBP (Ribulose bisphosphate)

b)

RuBisCo (Ribulose Bisphosphate Carboxylase)

c)

PGA (3-Phosphoglycerate)

d)

G3P (Glyceraldeyhyde 3-Phosphate)

41.

•Plants and plant-like organisms make their own food or energy (glucose) from sunlight.

a)

Chemotrophs

b)

Heterotrophs

c)

Autotrophs

d)

Saprophytes

42.

How many G3P is needed to convert to a one molecule of glucose?

a)

1

b)

2

c)

3

d)

4

e)

5

43.

•Photosynthesis is a type of anabolic and exergonic reaction.

a)

True

b)

False

44.

C4 plants initially fix carbon dioxide in bundle sheath as 4 carbon long compounds then transported to mesophyll cells to undergo Calvin cycle.

a)

true

b)

false

45.
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
46.

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

a)

thylakoid membrane

b)

lumen

c)

stroma

47.
Most plants appear green because chlorophyll
a)
absorbs green light.
b)
absorbs violet light.
c)
does not absorb green light.
d)
does not absorb violet light.
48.

What is water's role in photosynthesis?

a)

To create a liquid solute for oxygen to be made.

b)

To provide electrons and hydrogen, to energize ATP and NADPH.

c)

To help plants with gas exchange, such as diffusion of CO2.

d)

To hydrate plants and removes harmful waste products.

49.

What do pigments do?

a)

Absorb specific wavelengths(color) of visible light for energy.

b)

Absorb CO2 in the Stroma to create sugar.

c)

Transports e- in the electron transport chain.

d)

Transports energy between plant cells.

50.

What is reduced in photosynthesis?

a)

Glucose is reduced into carbon dioxide

b)

Carbon dioxide is reduced into glucose

c)

Water is reduced into oxygen

d)

Oxygen is reduced into water

51.

What is oxidized in photosynthesis?

a)

Glucose is oxidized into carbon dioxide

b)

Carbon dioxide is oxidized into glucose

c)

Water is oxidized into oxygen

d)

Oxygen is oxidized into water

52.

What is the term for an energy transfer between the electrons of adjacent pigment molecules (when electrons vibrate at a higher energy level)?

a)

Excited electron

b)

Photosystem

c)

Resonance energy transfer

d)

Photon

e)

Light reactions

53.

How does the chloroplast transform light energy into chemical energy? Select all that apply!

a)

e- are donated to an e- acceptor

b)

Excited e- produce light or heat

c)

Resonance energy transfers within a photosystem

d)

Light energy is stored in glucose molecules

e)

Excited e- transfer energy to a central chlorophyll molecule

54.

Which colors do carotenoids reflect? Select all that apply!

a)

Red

b)

Orange

c)

Green

d)

Blue

55.

What are the products of the light reactions? Select all that apply!

a)

Water

b)

Oxygen

c)

NADPH

d)

Glucose

e)

ATP

56.

Light reactions occur in the _____ and the Calvin Cycle occurs in the _____.

a)

Mito matrix ; inner mito membrane

b)

Granum ; thylakoid membrane

c)

Lumen ; stroma

d)

Thylakoid membrane ; stroma

57.

_____ replenishes the electrons lost by chlorophyll in Photosystem II

a)

Oxygen

b)

e- from Photosystem I

c)

Water

d)

Glucose

e)

Carbon dioxide

58.

What is the final electron acceptor in the light reactions?

a)

NAD+

b)

NADP+

c)

NADPH

d)

Oxygen

e)

Water

59.

What connects Photosystem II and Photosystem I?

a)

An enzyme that reduces NADP+

b)

The Calvin Cycle

c)

ATP synthase

d)

An electron transport chain

60.

In which stage of the Calvin Cycle is the enxyme RUBISCO used?

a)

Carbon fixation

b)

Oxidation phase

c)

Reduction phase

d)

Regeneration phase

61.

Which phases of the Calvin Cycle require ATP? Select all that apply!

a)

Carbon fixation

b)

Oxidation phase

c)

Reduction phase

d)

Regeneration phase

e)

Glycolysis

62.

Which organelle stores water for use in photosynthesis?

a)

Chloroplast

b)

Cell Membrane

c)

Vacuole

d)

Nucleus

63.

How does most of the water needed by the plant get into its leaves?

a)

It enters through the stomata

b)

The roots absorb it and then it travels up the stem

c)

It's made during a chemical reaction in the leaf

d)

The flowers capture water and deliver it to the leaves

64.
How does carbon dioxide get into the leaves of a plant?
a)
It's absorbed by the roots
b)
It's made in a chemical reaction in the stem
c)
It enters through the stomata
d)
It goes through the flowers
65.

Recall the main function of a xylem cell.

a)

To transport nutrients (mainly sucrose) to different parts of a plant.

b)

To make energy for the plant via photosynthesis.

c)

To transport carbon dioxide to the leaves for photosynthessis.

d)

To transport water to different parts of plant.

66.

Recall the main funtion of a phloem cell.

a)

To transport nutrients (mainly glucose) to different parts of a plant.

b)

To transport water to different parts of a plant.

c)

To make energy for the plant via photosynthesis.

d)

To provide structural support to a plant.

67.

The process of light oxidizing H2O into O2 is called

a)

Hydrolysis

b)

Photolysis

c)

Hydrophilic

d)

Dehydrogenase

68.

True or false: there is a cyclic and linear pathway for electrons to follow in the light reactions

a)

False

b)

True

69.

Photosystem 2 is to P680 as Photosystem 1 is to

a)

P720

b)

P690

c)

P700

d)

P660

70.

The Calvin cycle is responsible for the production of what macromolecules

a)

Carbohydrate

b)

Protein

c)

Nucleic acid

d)

Fatty acids

71.

What is the correct order for the Calvin cycle?

a)

carbon fixation, RUBP regeneration, carbohydrate production (reduction)

b)

RUBP regeneration, carbohydrate production (reduction), carbon fixation

c)

carbohydrate production (reduction), carbon fixation, RUBP regeneration,

d)

carbon fixation, carbohydrate production (reduction), RUBP regeneration,

72.

How many ATP and NADPH are required when you have an input of 6 CO2 in the Calvin cycle

a)

6; 12

b)

12; 15

c)

18; 12

d)

20; 18

73.

What is the primary product of the Calvin cycle that is later converted into glucose?

a)

glyceraldehyde 3 phosphate

b)

1,3 bisphosphate glycerate

c)

3 phosphate glycerate

d)

ribulose 5 phosphate

74.

What is the major enzyme found in the Calvin cycle that is responsible for carbon fixation (Ribulose 1,5 bisphosphate and CO2) ?

a)

Phosphoribulokinase

b)

Phosphate gylcerate kinase

c)

Rubisco

d)

phosphate gylceraldyhyde dehydrogenase

75.

Cellular respiration is an exergonic reaction, therefore photosynthesis is a (n)______ reaction

a)

Long

b)

Exergonic

c)

Catabolic

d)

Anabolic

76.

True or false: NADPH is just the plant form of NADH which is found in animals and used as an electron carrier in cellular respiration.

a)

True

b)

False

77.

An organism that can make its own food

a)

autobot

b)

heterotroph

c)

autotroph

d)

heterobot

78.

An organism that cannot make its own food.

a)

autobot

b)

heterotroph

c)

autotroph

d)

heterobot

79.

The raw materials of a chemical reaction. Located on the left side of a chemical equation.

a)

water

b)

energy

c)

resources

d)

reactants

80.

The 'outputs' of a chemical reaction. Located on the right side of a chemical equation.

a)

products

b)

produce

c)

consumers

d)

detritis

81.
The enzyme responsible for Carbon Fixation in C3 Photosynthesis is
a)
RuBisCo
b)
PEP Carboxylase
c)
Hexokinase
d)
Pyruvate DeHydrogenase
82.
The enzyme responsible for Carbon Fixation in C4 Photosynthesis is
a)
RuBisCo
b)
PEP Carboxylase
c)
Hexokinase
d)
Pyruvate DeHydrogenase
83.
The first molecule formed after CO2 is added to the Calvin Cycle is:
a)
RuBP
b)
G3P
c)

3-PGA

d)
G3P
84.
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
85.

In the Calvin Cycle, carbohydrate molecules are (2nd step):

a)
Reduced
b)
Oxidized
86.
The loss of H2O through stomata is referred to as:
a)
Transpiration
b)
Respiration
c)
Evaporation
d)
Photorespiration
87.
The main advantage of C4 Photosynthesis is the ability to avoid:
a)
Transpiration
b)
Photorespiration
c)
Photosynthesis
d)
Signal Transduction
88.
The main advantage of CAM Photosynthesis is the ability to avoid:
a)
Transpiration
b)
Photorespiration
c)
Photosynthesis
d)
Signal Transduction
89.
In CAM Photosynthesis CO2 is stored as:
a)
Malate
b)
RuBP
c)
Pyruvate
d)
G3P
90.
In CAM Photosynthesis, the enzyme RuBisCo is replaced by PEP Carboxylase.
a)
True
b)
False
91.
Carbon fixation in CAM plants occurs during the:
a)
Day
b)
Night
92.
All forms of photosynthesis involve the enzyme RuBisCo.
a)
True
b)
False
93.

In arid conditions, C3 plants will close their stomata. This results in lower carbon dioxide concentrations in the leaf. As a result, C3 plants encounter this problematic reaction.

a)
Transpiration
b)

Photorespiration

c)
Dehydration
d)
Starvation
94.
Which of the following molecules is not needed for the Calvin Cycle?
a)
CO2
b)
ATP
c)
NADPH
d)
H2O
95.

CAM plants store _____ by binding it to pyruvate. This results in the formation of malate in C4 plants and oxaloacetate then malate in CAM plants.

a)
H20
b)
CO2
c)
Sunlight
d)
Carbon Dioxide
96.

CO2 is released into the Calvin Cycle by what 4C intermediate formed in C4 and CAM plants?

a)

Oxaloacetate

b)

Pyruvate

c)

Malate

d)

PEP Carboxylase

97.
What Does CAM stand for
a)
Crassulacean Acid Metabolism
b)
Carbon Acid Metabolism
c)
Canvas Acid Metabolism
d)
Core Acid Metabolism
98.
True or False CAM plants open their stomata at night
a)
true
b)
false
99.
True or False Photo system 1 happens  before Photo System 2
a)
true
b)
false
100.
Why do CAM plants open their stomata at night
a)
It just happens
b)
To reduce evaporation
c)
To collect Carbon Dioxide
d)
None of the above
101.
True or False c4 plants use the c4 pathway
a)
true
b)
false
102.

CAM plants have a different adaptation to what climate

a)

cold and wet

b)

arid (very hot/dry)

c)

hot and wet

d)

none of the above

103.

In C4 plants, the Calvin cycle....

a)

Takes place at night

b)

Only occurs when the stomata are closed

c)

Takes place in the mesophyll

d)

Takes place in the bundle-sheath cells

104.

What are C3 plants?

a)

These plants are the best when it comes to storing water due to their extremely dry environments

b)

These plants mostly just reduce the rate of photorespiration

c)

plants that do the calvin cycle in the mesophyll cells

d)

Deciduous trees with needle-like leaves that reduce surface area where water loss could occur.

105.

The enzyme responsible for Carbon Fixation in C3 Photosynthesis is

a)

RuBisCo

b)

PEP Carboxylase

c)

Hexokinase

d)

Pyruvate DeHydrogenase

106.

Which of these would be considered a C4 Pathway plant?

a)

cactus

b)

sugar cane

c)

oak tree

d)

aglae

107.

Which of these would be considered a CAM pathway plant?

a)

cactus

b)

corn

c)

elm tree

d)

algae

108.

Which part of the leaf is involved in conserving water in dry conditions?

a)

stroma

b)

chloroplast

c)

veins

d)

stomata

109.

_____ plants like cacti, succulents, and pineapple only open their stomata for CO2 uptake at night.

a)

C3

b)

C4

c)

CAM

110.

Which type of plant fixes carbon only at night?

a)

C3

b)

C4

c)

CAM

d)

all of these

111.

oxygen becomes attached to RuBP during...

a)

C3 pathway

b)

C4 pathway

c)

Calvin-Benson Cycle

d)

Photorespiration

112.

The enzyme responsible for Carbon Fixation in C4 and CAM Photosynthesis is

a)

RuBisCo

b)

PEP Carboxylase

c)

Hexokinase

d)

Pyruvate DeHydrogenase

113.
How many G3P molecules make one molecule of glucose? 
a)
1
b)
2
c)
3
d)
4
114.
What does NADPH do? 
a)
carries electrons to the Calvin cycle
b)
carries electrons to the ETC
115.
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
116.

What happens to G3P molecules not made into sugars in the last step of the dark reactions?

a)

They are used to make ATP

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.

117.
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
118.
Most plants carry out the _____ pathway in photosynthesis.
a)
CAM
b)
C4
c)
C3
d)

C6

119.

What is the primary function of the Calvin cycle?

a)

To absorb light energy

b)

To fix carbon dioxide into organic molecules

c)

To convert solar energy into chemical energy

d)

To produce oxygen

120.

Which pigment is primarily responsible for capturing light energy in plants and donating its e- to the ETC?

a)

Chlorophyll a

b)

Xanthophylls

c)

Chlorophyll b

d)

Carotenoids

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