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A Level Photosynthesis

Total questions: 70

Worksheet time: 3hrs 32mins

Name
Class
Date
1.
What is the pigment in chloroplasts that performs photosynthesis?
a)
Chlorosynthesis
b)
Chlorophyll
c)
ADP
d)
Electron Transport
2.
The stacks of disks in the chloroplast are called:
a)
Lamellae
b)
Grana
c)
Stroma
d)
Thylakoid
3.
The interior space of the chloroplast is called:
a)
Lamellae
b)
Grana
c)
Stroma
d)
Thylakoids
4.
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
5.
Where does the light independent reaction take place?
a)
Matrix
b)
Stroma
c)
Thylakoid membrane
d)
Cytoplasm
6.
What reactants are needed for the Calvin cycle?
a)
Carbon dioxide
b)

Carbon dioxide, ATP and NADPH

c)
Carbon dioxide and glucose
d)
Oxygen and water
7.
Where do the light reactions happen?
a)
mitochondria membrane
b)
thylakoid membrane
c)
stroma
d)
central vacuole
8.
What are the two products of the light reactions that are needed for the calvin cycle?
a)
NAD and NADPH
b)
NADP + and Glucose
c)
NADPH and ATP
d)
Oxygen and NADPH
9.

Which of the following equations represents the overall chemical reaction for photosynthesis?

a)

6O2+ 6H2O → C6H12O6+ 6O2

b)

C6H12O6 + 6H2O→ 6O2+ 6O2

c)

6CO2+ 6H2O→ C6H12O6+ 6O2

d)

6O2 + 6H2O→ C6H12O6 + 6CO2

10.
What happens to the O2 created in the light phase?
a)
Is transferred to the Calvin Cycle
b)
Donates its electrons to the Chlorophyll molecules
c)
Provides a carbon to form the unstable 6-carbon molecule
d)
Diffuses out through the stoma
11.
Water is split during
a)

photophosphorylation

b)

photolysis

c)
calvin cycle
d)
cell respiration
12.

The rate of photosynthesis can be influenced by...

a)

Temperature

b)

Carbon dioxide levels

c)

Light intensity

d)

Oxygen concentration

13.

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

14.

Temperatures that are too high can slow photosynthesis because

a)

stomata stay open

b)

enzymes are ruined

c)

there is not enough CO2

d)

there is too much water

15.
Which of the following molecules is not needed for the Calvin Cycle?
a)
CO2
b)
ATP
c)
NADPH
d)
H2O
16.

What do plants take in through their ROOTS to make food (or carry out photosynthesis)?

a)

Carbon Dioxide

b)

Water

c)

Light

17.

Where in a plant cell does photosynthesis take place

a)

Palisade cells

b)

Chlorophyll

c)

Chloroplasts

d)

Vacuole

18.

What is the purpose of photosynthesis?

a)

To release energy

b)

To create glucose

c)

To grow

d)

To get oxygen for respiration

19.

Which of these are limiting factors for photosynthesis? Choose 3 answers.

a)

Light intensity

b)

CO2 concentration

c)

Temperature

d)

Light

e)

CO2 low levels

20.

What are the products of photosynthesis?

a)

Oxygen and Energy

b)

Carbon Dioxide and Glucose

c)

Glucose and Oxygen

d)

Oxygen and Water

21.
What molecule absorbs sunlight for photosynthesis?
a)
chloroplast
b)
thylakoid
c)
grana
d)
chlorophyll
22.

Chlorophyll works best with __________ and ___________ wavelenght of light.

a)

violet

b)

green

c)

blue

d)

yellow

e)

red

23.
Where do the light reactions happen?
a)
mitochondria membrane
b)
thylakoid membrane
c)
stroma
d)
central vacuole
24.

The Calvin Cycle occurs in the

a)

Thylakoid

b)

Grana

c)

Inner membrane of chloroplast

d)

Stroma

25.

Main products of the Calvin Cycle

a)

Oxygen, NADP+, ADP

b)

Glucose, CO2, ADP

c)

ADP, NADP+, Glucose

d)

ATP, NADPH, Oxygen

26.

Sugar and oxygen are the ________________of photosynthesis, while carbon dioxide, water and light energy are the ___________________.

a)

end result, ingredients

b)

ingredients, end result

c)

reactants, products

d)

products, reactants

27.

NADPH and ATP are the forms of the energy carrying molecules that are full of electrons that will be used to power the second part of photosynthesis, the ______________.

a)

Water cycle

b)

Krebs cycle

c)

Carbon cycle

d)

Calvin cycle

28.

In the Calvin cycle, the end result is

a)

water

b)

sugar

c)

oxygen

d)

carbon dioxide

29.

Light reactions occur in the ______________________of the chloroplast

a)

thylakoids

b)

stroma

c)

outer membrane

30.

Light-independent reactions occur in the ______________________of the chloroplast

a)

thylakoids

b)

stroma

c)

outer membrane

31.
In the Calvin Cycle, carbon from CO2 is added to one molecule of RuBP to create _________.
a)
RUDP
b)
An Unstable 6 Carbon Molecule
c)
PGA
d)
2 3-carbon molecules
32.
The Calvin Cycle occurs in the ___________.
a)
Stroma
b)
Thylakoid Membrane
c)
Enzyme ATP Synthase
d)
Chlorophyll
33.
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
34.
In order to efficiently create 1 glucose molecule, the Calvin Cycle must occur how many times?
a)
3
b)
6
c)
1
d)
12
35.
The energy provided by ATP comes from what?
a)
Adenosine
b)
The phosphate groups
c)
The bonds between the phosphate groups
d)
The excited electron
36.
After reaching an excited state, electrons jump from the chlorophyll molecules to the __________.
a)
Stroma
b)
Electron transport chain
c)
Photosystem 2
d)
H+ ion reservoir 
37.
What happens to the O2 created in the light phase?
a)
Is transferred to the Calvin Cycle
b)
Donates its electrons to the Chlorophyll molecules
c)
Provides a carbon to form the unstable 6-carbon molecule
d)
Diffuses out through the stoma
38.
Adenosine Triphosphate is created after an H+ passes through ____________. 
a)
The Stroma
b)
ATP Synthase 
c)
The Calvin Cycle
d)
The electron transport chain
39.
The energy required to pump H+ ions into the H ion reservoir comes from the _____________
a)
ATP molecules
b)
Electron Transport Chain
c)
Light 
d)
Thylakoid Membrane
40.
The process which joins together ADP and P is called ______________
a)
ATP Creation
b)
Glycolysis 
c)
Active Transport
d)
Chemiosmosis
41.
The 5-Carbon molecules that the Calvin Cycle starts and ends with, is called _____________.
a)
PGA
b)
G3P
c)
RuBP
d)
RuDp
42.
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
43.
The light dependent phase occurs in the __________.
a)
Stroma
b)
Thylakoid Membrane
c)
Chlorophyll
d)
Chloroplast Membrane
44.
True or False: While the light dependent phase can only occur during the day, the Calvin Cycle may occur during the day or night
a)
True
b)
False
45.
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
46.
Chlorophyll in Photosystem I regains its lost electrons from ________.
a)
H2O
b)
Electrons jumping off the ETC from Photosystem II
c)
Sunlight
d)
ADP returning from the Calvin Cycle
47.
The final step of the Light Dependent Phase involves the creations of _____________.
a)
NADPH
b)
Glucose
c)
ATP
d)
CO2
48.
In the process of efficiently creating 3 glucose molecules, how many PGA molecules would be produced?
a)
18
b)
6
c)
36
d)
12
49.
True or False: If Photosystem's did not need to replace their electrons, photosynthesis could occur without H2O
a)
True
b)
False
50.
True or False: The Calvin Cycle returns ADP and NADP to the light dependent phase.
a)
True
b)
False
51.
What are the two products of the light reactions that are needed for the calvin cycle?
a)
NAD and NADPH
b)
NADP + and Glucose
c)
NADPH and ATP
d)
Oxygen and NADPH
52.
What supplies the electron that is lost in PS II?
a)
oxygen
b)
water
c)
glucose
d)
rubisco
53.
ATP gets formed in the light dependent reaction by which process?
a)
Chemiosmosis
b)
Photosmosis
c)
Diffusion
d)
Active Transport
54.
What supplies the electrons that are lost in photosystem I (PSI)?
a)
the electrons from PS II
b)
water
c)
glucose
d)
oxygen
55.
What is the purpose of splitting water in PS2 of the light dependent reaction?
a)
Provides e- for PS2 and H+ for the thylakoid space
b)
To produce Oxygen for animals
c)
There is no purpose
56.
It is important to create a concentration of H+  in the thylakoid space so that the H+ can diffuse through_________ to create ______.
a)
ATP synthase, ATP
b)
NADH, NADPH
c)
proton pump, protons
57.
Protons move into the thylakoid due to the
a)
concentration gradient in the stroma
b)
  Brownian motion of the protons.
c)
  peer pressure of the cool electrons in the stroma.  
d)
movement of electrons through the electron transport chain
58.
Which of the following is NOT a product of the light reactions?
a)
ATP
b)
NADPH
c)
Oxygen
d)
Glucose
59.

Choose the statement that best describes light reaction.

a)

It converts CO2 to sugar molecule

b)

It converts light energy to chemical energy of ATP and NADPH

c)

It takes place in the stroma

60.

Which of the following is not needed to start the light reaction

a)

H2O

b)

ADP + P

c)

CO2

61.

What is the waste-product of light-dependent reaction?

a)

oxygen

b)

water

c)

carbon dioxide

62.

What is the unit of light?

a)

proton

b)

photon

c)

photosystem

63.
In the ________________________, energy from the sun is used to make ATP 
a)
light-independent reaction
b)
dark reaction
c)
light-dependent reaction
d)
Calvin cycle
64.

Sunlight is used during photosynthesis to-

a)

Break down the xylem

b)

Break down the stomata

c)

Break down the water

d)

Capture the water

65.
The energy required to pump H+ ions into the H ion reservoir comes from the _____________
a)
ATP molecules
b)
Electron Transport Chain
c)
Light 
d)
Thylakoid Membrane
66.
What is the function of NADP+?
a)
It absorbs light
b)
It is an electron carrier
c)
It is a light-reflecting pigment
d)
It acts as long-term energy storage
67.
Water is split during
a)
photosystem 1 of the light dependent reaction
b)
photosystem 2 of the light dependent reaction
c)
calvin cycle
d)
cell respiration
68.

This molecule is similar to ADP. It carries hydrogen ions.

a)

NADP+

b)

NADPH

c)

ADP+H

d)

ATP-P

69.

What is the process where the energy in light is used to break up a molecule of water?

a)

hydrolysis

b)

photolysis

c)

glycolysis

d)

nicolysis

70.

What does light do when it strikes the chlorophyll molecules of photosystems I and II?

a)

Light causes glucose to be synthesized directly inside the chlorophyll molecules of the photosystems.

b)

Light causes electrons to get excited (gain energy) and travel down the electron transport chain embedded in the thylakoid membrane.

c)

Light causes the conversion of water into carbon dioxide, oxygen, and electrons.

d)

Light directly causes carbon dioxide to attach to RuBP during the carbon fixation stage of the Calvin Cycle.

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