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Photosynthesis

Total questions: 70

Worksheet time: 41mins

Name
Class
Date
1.

Photosynthesis occurs in:

a)

Mitochondria

b)

Chloroplasts

c)

Humans

d)

Animals

2.

What are the reactants in Photosynthesis?

a)

Sun, CO2, glucose

b)

glucose and oxygen

c)

sun, carbon dioxide, water

d)

water, glucose

3.

The process in which plant cells make energy

a)

Exothermic

b)

Endothermic

c)

Cellular Respiration

d)

Photosynthesis

4.

In photosynthesis, what kind of molecule does hydrogen start in?

a)

water

b)

oxygen

c)

glucose

d)

carbon dioxide

5.

For photosynthesis, a plant needs water, sun, and...

a)

oxygen

b)

carbon dioxide

c)

glucose

d)

mitochondria

6.
Which of the following is the correct equation for PHOTOSYNTHESIS?
a)
CO2 + light + H2O --> O2 + Sugar
b)
CO2 + sugar + H2O --> O2 + light
c)
O2 + light + H2O --> CO2 + Sugar
d)
CO2 + O2 + H2O --> Light+ Sugar
7.
Which organelle performs PHOTOSYNTHESIS?
a)
Chloroplast
b)
Mitochondria
8.
What process occurs when light energy is captured in autotrophs and converted into sugar?
a)
Photosynthesis
b)
Cellular Respiration
9.
Which organisms perform Photosynthesis?
a)
Only Autotrophs
b)
Only Heterotrophs
c)
Autotrophs and Heterotrophs
10.
Which of the following is an example of an AUTOTROPH?
a)
Appletree
b)
Dog
c)
Mushroom
d)
Human
11.
Which of the following is an example of a HETEROTROPH?
a)
Grass
b)
Algae
c)
Lemon Tree
d)
Bear
12.
Which gas is removed from the atmosphere during photosynthesis?
a)
hydrogen
b)
oxygen
c)
nitrogen
d)
carbon dioxide
13.
What are the products of photosynthesis?
a)
water and carbon dioxide
b)
oxygen and glucose
c)
oxygen and carbon dioxide
d)
oxygen and water
14.
Chloroplasts are...
a)
Structures of animal cells to produce ATP
b)
Organelles where lipids are elaborated
c)
Specialized structures of plants where food is made
d)
Waste organelle of plants
15.
Which organelle from the plant cell is primarily responsible for converting sunlight to energy?
a)
Mitochonria
b)
Nucleus
c)
Vacuole
d)
Chloroplast
16.
If all four plants were watered daily but placed in a closet, receiving no sunlight, what process would NOT occur?
a)
Ingestion of carbon dioxide
b)
Filtration of water through the soil
c)
Photosynthesis
d)
Water absorbtion
17.
What leaf structure prevents water loss?
a)
spongy mesophyll
b)
cuticle
c)
stoma
d)
phloem
18.
What tissue contains cells where the majority of photosynthesis takes place?
a)
spongy mesophyll
b)
palisade mesophyll
c)
upper epidermis
d)
guard cells
19.
What can change shape to open and close the stoma?
a)
guard cells
b)
xylem
c)
phloem
d)
vascular bundle
20.

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

21.
carries water and minerals from roots to other parts of the plant
a)
xylem 
b)
phloem
c)
stoma
d)
guard cell
22.
The important gases, carbon dioxide and oxygen, enter and leave the leaf through the
a)
upper epidermis
b)
phloem
c)
stomata
d)
guard cells
23.

Which product is "waste" and mostly released by the producer (plant)?

a)

oxygen

b)

carbon dioxide

c)

sugar

d)

glucose

24.
Which statement about photosynthesis is correct?
a)
Plants get the energy they need for photosynthesis from water.
b)
Plants get the energy they need for photosynthesis from soil.
c)
Plants get the energy they need for photosynthesis from sunlight.
d)
Plants get the energy they need for photosynthesis from carbon dioxide.
25.
Which plant part absorbs water and nutrients?
a)
Leaf
b)
Stem
c)
Roots
d)
Flower
26.

Main products of the Calvin Cycle

a)

Oxygen, NADP+, ADP

b)

Glucose, CO2, ADP

c)

ADP, NADP+, Glucose

d)

ATP, NADPH, Oxygen

27.

The Calvin Cycle occurs in the

a)

Thylakoid

b)

Grana

c)

Inner membrane of chloroplast

d)

Stroma

28.

5 carbon sugar that combines with CO2 in the Calvin Cycle

a)

3-PGA

b)

G3P

c)

RuBP

d)

Glucose

29.

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

30.

Tiny pores on the underside of leaves

a)

Stroma

b)

Stomata

c)

Thylakoids

d)

Chloroplasts

31.

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

32.

A plant using the C4 pathway will

a)

fix CO2 into a four carbon sugar instead of a three carbon sugar

b)

close the stomata during the day

c)

produce a four carbon sugar instead of glucose

d)

not need ATP from the light reactions

33.

Which of the following is a way to increase the rate of photosynthesis?

a)

Increase oxygen levels

b)

Decrease CO2 levels

c)

Increase light intensity

d)

Decrease water level

34.

Which is not a C4 plant?

a)

Cactus

b)

Corn

c)

Sugar cane

d)

Crab grass

35.

Which of the following is a CAM plant?

a)

Corn

b)

Sugar cane

c)

Crabgrass

d)

Pineapple

36.

Which of the following is true of the Light Reactions?

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 stroma

d)

Occurs in the cytoplasm

37.

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

38.

Rate of photosynthesis ________ as light intensity _________

a)

increases, increases

b)

decreases, increases

c)

increases, decreases

39.

Increasing carbon dioxide can increase photosynthesis, but only to a maximum rate because

a)

There are not enough RuBP molecules

b)

Oxygen cannot leave fast enough

c)

Large amounts of CO2 cannot fit in the chloroplast

d)

Calvin cycle can only go as fast as the light reactions

40.

Increasing temperature can speed up photosynthesis to a certain point.

a)

True

b)

False

41.

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

42.
How many G3P molecules make one molecule of glucose? 
a)
1
b)
2
c)
3
d)
4
43.
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
44.
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. 
45.
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
46.
The Calvin Cycle occurs in the ___________.
a)
Stroma
b)
Thylakoid Membrane
c)
Enzyme ATP Synthase
d)
Chlorophyll
47.
The 5-Carbon molecules that the Calvin Cycle starts and ends with, is called _____________.
a)
PGA
b)
G3P
c)
RuBP
d)
RuDp
48.
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
49.

Which enzyme joins CO2 and RuBP?

a)

NADP+ reductase

b)

RUBISCO

c)

ATP synthase

d)

none of the above

50.
How many carbons does G3P have?
a)
1
b)
2
c)
3
d)
6
51.

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

52.

To bring in nonliving carbon (CO2) and use it to make organic compounds is a process called _______________.

a)

carbon fixation

b)

cellular respiration

c)

catabolic reactions

d)

mitosis

53.
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
54.
What does NADPH do? 
a)
carries electrons to the Calvin cycle
b)
carries electrons to the ETC
55.

Aerobic means

(a)  

56.

Anaerobic means

(a)  

57.

What organelle allows for photosynthesis to occur?

a)

mitochondria

b)

chlorophyll

c)

chloroplast

d)

lysosome

58.

At night time with zero light, what gas would be collected the most from a plant?

a)

oxygen

b)

hydrogen

c)

carbon dioxide

d)

water vapor

59.

On a 95 degree day in the daylight, what gas is likely to be collected from a plant the most?

a)

carbon dioxide

b)

water vapor

c)

oxygen

d)

hydrogen

60.

Where does the light reaction take place?

(a)  

61.

Where does the dark reaction take place?

(a)  

62.

Photosynthesis goal is to

a)

convert light energy into glucose energy

b)

use light energy to make oxygen gas

c)

convert sugar energy into ATP

d)

convert sugar energy into oxygen gas

63.

Rubisco is important in which step of photosynthesis

a)

energizing the electrons in chlorophyll

b)

carbon fixation when CO2 is connected to RUBP during calvin cycle

c)

regeneration phase as RUBP is made during calvin cycle

d)

reduction of the carbon chain during the calvin cycle

64.

Plants obtain CO2 into the chloroplast by

a)

active transport

b)

diffusion

c)

facilitated diffusion

d)

endocytosis

65.

Photosystems are made of

a)

chloroplasts

b)

chromosomes

c)

chlorophyll

d)

cytoplasm

66.

ATP is made during the light reaction using all of the following EXCEPT

a)

proton pump

b)

hydrogen ion gradient

c)

electron energy from photosystem II

d)

NADPH donating electrons

67.

Why does photorespiration occur?

a)

stomata are closed and CO2 levels are too low.

b)

stomata are closed and O2 levels are too low.

c)

stomata are open and too much water is leaving the plant

d)

stomata are open and the plant receives too much CO2

68.

What does a C4 plant do?

a)

stores CO2 in a separate cell from its photosynthetic cell during the day

b)

stores CO2 in a vacuole during the night.

c)

can't store CO2 so it sufferes photorespiration

d)

can't store CO2 so it speeds up cellular respiration in order to make more CO2

69.

Plants that store CO2 at night as an acid in a vacuole are called

a)

C3 plants

b)

C4 plants

c)

CAM plants

70.

Which plant LACKS CO2 storage method

a)

C3

b)

C4

c)

CAM

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