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Photosynthesis

Total questions: 54

Worksheet time: 38mins

Name
Class
Date
1.

What are the 3 reactants of photosynthesis? The reactants are the things needed for photosynthesis to occur.

a)

oxygen, glucose, sunlight

b)

sunlight, oxygen, water

c)

water, oxygen, carbon dioxide

d)

carbon dioxide, sunlight, water

2.

What pigment captures/absorbs sunlight?

a)

stomata

b)

chlorophyll

c)

chloroplast

d)

phloem

3.

What are the 2 products of photosynthesis? The products are the things made in the process of photosynthesis.

a)

water, sunlight

b)

glucose, carbon dioxide

c)

oxygen, glucose

d)

sunlight, oxygen

4.

What is the main purpose of photosynthesis?

a)

To make food

b)

To create energy

c)

To release oxygen

d)

To absorb sunlight

5.

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

a)

oxygen

b)

carbon dioxide

c)

sugar

d)

glucose

6.
____________________ provides the energy necessary for photosynthesis.
a)
water
b)
sunlight
c)
glucose
d)
soil
7.
Glucose is a ...
a)
sugar
b)
carbohydrate
c)
source of quick energy
d)
all are correct
8.
The formula for glucose is...
a)
C12 H22 O11
b)
NaCl
c)
NaOH
d)
C6 H12 O6
9.
Chlorophyll absorbs a higher percentage of _____ and _______ light.
a)
green and purple
b)
red and blue
c)
black and orange
d)
yellow and green
10.
Most plants appear green because chlorophyll
a)
absorbs green light.
b)
absorbs violet light.
c)
reflects green light.
d)
does not absorb violet light.
11.
A student is collecting the gas given off from a plant in bright sunlight at a temperature of 27°C. The gas being collected is probably ________.
a)
oxygen
b)
carbon dioxide
c)
ATP
d)
glucose
12.
If carbon dioxide is completely removed from a plant’s environment, what would you expect to happen to the plant’s production of high-energy sugars (rate of photosynthesis)?
a)
Sugar production will likely increase.
b)
Sugars will not be produced.
c)
The rate of sugar production will decrease .
d)
Fewer sugars will be produced at first, but then the plant will recover.
13.
The rate of photosynthesis is affected by all of the following except
a)
the amount of salt.
b)
the availability of water.
c)
light intensity.
d)
temperature (enzymes).
14.
Which conclusion best matches the trends shown on the graph?
a)
Bean plants produce more ATP than corn plants.
b)
Corn plants require more oxygen than bean plants.
c)
Corn plants release more carbon dioxide than bean plants.
d)
Corn plants produce sugars at a faster rate than bean plants.
15.
What molecule absorbs sunlight for photosynthesis?
a)
chloroplast
b)
thylakoid
c)
grana
d)
chlorophyll
16.
Autotroph or heterotroph?
a)
Autotroph
b)
Heterotroph
17.
Autotroph or Heterotroph?
a)
Autotroph
b)
Heterotroph
18.
Autotroph or heterotroph?
a)
Autotroph
b)
Heterotroph
19.
Which of the following is the correct equation for PHOTOSYNTHESIS?
a)
6CO2 + 6H2O --> 6O2 + C6H12O6
b)
6CO2 + C6H12O6 + 6H2O --> O2 
c)
6O2 + 6H2O --> 6CO2 + C6H12O6
d)
C6H12O6 + 6O2 ---> 6H2O + 6CO2 
20.
Which of the following is an example of a HETEROTROPH?
a)
Grasses
b)
Algae
c)
Lemon Tree
d)
Bush Mouse
21.
Which gas is removed from the atmosphere during photosynthesis?
a)
hydrogen
b)
oxygen
c)
nitrogen
d)
carbon dioxide
22.
Plants need ________ for photosynthesis
a)
oxygen
b)
soil
c)
carbon dioxide
d)
sugar
23.
What are the bubbles rising in the test tube?
a)
nitrogen gas
b)
carbon dioxide gas
c)
glucose
d)
oxygen gas
24.
The light independent reactions of photosynthesis happen where?
a)
stroma of chloroplast
b)
mitochondrial matrix
c)
stem
d)
thylakoid membrane
25.
Which product is produced by the splitting of water during the light-dependent reactions of photosynthesis?
a)
NADPH
b)
oxygen
c)
glucose
d)
carbon dioxide
26.
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
27.
#4 is pointing to an individual "pancake" in this stack.  What is this called?
a)
Stroma
b)
Thylakoid
c)
Granum
d)
Stomata
28.
 #3 is pointing to the space outside the stacks in this chloroplast.  What is this area called?
a)
Thylakoid space
b)
Thylakoid
c)
Stroma
d)
Stomata
29.

Most autotrophs obtain the energy they need to sustain life through the chemical

process of —

a)

eating other organisms

b)

cellular respiration

c)

autotrophic fermentation

d)

photosynthesis

30.

Molecular oxygen is produced during -

a)

the Calvin Cycle

b)

the light reactions of photosynthesis

c)

glycolysis

d)

the electron transfer chain

31.
How does photosynthesis benefit heterotrophs?
a)
It adds carbon dioxide to the air.
b)
It creates a source of energy they can eat.
c)
It creates clean water.
d)
It eliminates harmful sugars.
32.
Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin cycle?
a)
CO2 and glucose
b)
H2O and O2
c)
electrons and H+
d)
ATP and NADPH
33.
Where does the Calvin cycle take place?
a)
stroma of the chloroplast
b)
thylakoid membrane
c)
outer membrane of the chloroplast
d)
interior of the thylakoid membrane
34.
When oxygen is released as a result of photosynthesis, it is a direct by-product of
a)
reducing NADP+
b)
splitting water molecules
c)
chemiosmosis
d)
electron transfer in photosystem II and I
35.
Which of the following events occurs in the light reactions of photosynthesis?
a)
NADP+ is produced
b)
ATP is consumed to yield ADP
c)
carbon dioxide is fixed in organic molecules
d)
light is absorbed and funneled to reaction-center chlorophyll a
36.
What is the primary function of the Calvin cycle?
a)
regenerate ATP for use in the light reactions of photosynthesis
b)
produce carbon dioxide for use in the light reactions of photosynthesis
c)
produce oxygen by oxidizing water
d)
produce simple sugars from carbon dioxide
37.
Where do the enzymatic reactions of the Calvin cycle take place?
a)
stroma of the chloroplast
b)
thylakoid membranes
c)
matrix of the mitochondria
d)
thylakoid space
38.
Reactions that consume CO2 take place in
a)
the light reactions of photosynthesis only
b)
the calvin cycle only
c)
the light reactions and the calvin cycle
d)
the calvin cycle and the citric acid cycle
39.

Which of the following statements best represents the relationships between the light reactions and the Calvin cycle?

a)

The light reactions provide ATP and NADPH to the Calvin cycle, and the Calvin cycle returns ADP, and NADP+ to the light reactions.

b)

The light reactions provide ATP and NADPH to the carbon fixation step of the Calvin cycle, and the Calvin cycle provides water and electrons to the light reactions.

c)

The light reactions supply the Calvin cycle with CO2 to produce sugars, and the Calvin cycle supplies the light reactions with sugars to produce ATP.

d)

The light reactions provide the Calvin cycle with oxygen for carbon fixation, and the Calvin cycle provides the light reactions with sugars to produce ATP.

40.

Light independent reaction occurs in …

a)

Stroma.

b)

Thylakoid space.

c)

Intermembrane space.

d)

Thylakoid membrane.

41.

Organisms that cannot make their own food and must obtain energy from the foods they eat are called____.

a)

autotrophs

b)

heterotrophs

c)

plants

d)

thylakoids

42.

What are the three parts of an ATP molecule?

a)

adenine, thylakoids, stroma

b)

adenine, ribose, 3 phosphate groups

c)

stroma, grana, chlorophyll

d)

NADP+, NADPH, and FADH2

43.

How does the Calvin cycle differ from the light-dependent reactions?

a)

It takes place in the stroma.

b)

It takes place in the thylakoid.

c)

It requires light.

d)

It takes place in chloroplasts.

44.

Where do the light-dependent reactions take place?

a)

in the stroma

b)

only in chlorophyll molecules

c)

in the thylakoid membranes

d)

outside the chloroplasts

45.

In Figure 8-6, what chemical is converted to sugar in the Calvin cycle?

a)

carbon dioxide

b)

oxygen

c)

light

d)

water

46.

What are the products of the light-dependent reactions shown in Figure 8-6?

a)

water, carbon dioxide, sugars

b)

light, oxygen, sugars

c)

oxygen, NADPH, ATP

d)

sugars, NADP+, ADP + P

47.

What are the products of the Calvin cycle shown in Figure 8-6?

a)

light, water, sugar

b)

sugars, NADP+, ADP + P

c)

oxygen, ATP, NADPH

d)

water, carbon dioxide, NADP+

48.

Which of the following does NOT affect the rate of photosynthesis?

a)

light intensity

b)

water

c)

temperature

d)

pressure

49.

Which lettered graph represents the affect of light intensity on photosynthetic rate?

a)

A

b)

B

c)

C

d)

D

50.

Which lettered graph represents the effect of carbon dioxide gas on photosynthetic rate?

a)

A

b)

B

c)

C

d)

D

51.

Which lettered graph represents the effect of temperature on photosynthetic rate?

a)

A

b)

B

c)

C

d)

D

52.

Which lettered graph represents the effect of water on photosynthetic rate?

a)

A

b)

B

c)

C

d)

D

53.

During the light dependent reaction of photosynthesis, ________ is decomposed to supply hydrogen ions to produce NADPH, and important energy-carrying molecule used to help produce glucose during the light independent reaction.

a)

H2O

b)

NADPH

c)

ATP

d)

CO2

54.

Which factor would not increase the production of glucose by photosynthesis in plants?

a)

freezing temperatures

b)

extra rainfall

c)

increased carbon dioxide levels

d)

increased sunlight exposure

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