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Photosynthesis

Total questions: 60

Worksheet time: 3615secs

Name
Class
Date
1.
Which organelle performs PHOTOSYNTHESIS?
a)
Chloroplast
b)
Mitochondria
2.
What are the products of photosynthesis?
a)
water and carbon dioxide
b)
oxygen and glucose
c)
oxygen and carbon dioxide
d)
oxygen and water
3.
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
4.
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
5.
The stacks of disks in the chloroplast are called:
a)
Lamellae
b)
Grana
c)
Stroma
d)
Thylakoid
6.
The interior space of the chloroplast is called:
a)
Lamellae
b)
Grana
c)
Stroma
d)
Thylakoids
7.
Where does the Calvin Cycle occur?
a)
thylakoid
b)
stroma
c)
lumen
d)
mitochondria
8.
Where do the light-dependent reactions occur? 
a)
thylakoid membrane
b)
stroma
c)
mesophyll
d)
mitochondria
9.
What gas is released by plants during photosynthesis?
a)
sulfur
b)
carbon dioxide
c)
oxygen
d)
hydrogen
10.
Which of the following is the correct equation for PHOTOSYNTHESIS?
a)
carbon dioxide + water --> oxygen + glucose
b)
carbon dioxide + glucose + water --> oxygen 
c)
oxygen + water --> carbon dioxide + glucose
d)
glucose+ oxygen ---> water + carbon dioxide 
11.

Look at the diagram. Which gas would most likely be found in the greatest amount in the bubbles?
a)
oxygen
b)
nitrogen
c)
ozone
d)
carbon dioxide
12.

A plant’s leaves are green because the color green is _________________back to our eyes.

a)

Absorbed

b)

Reflected

c)

Transmitted

d)

None of the Above

13.

Which is not a reactant (left side) needed for producing food in a green plant.

a)

Carbon Dioxide

b)

Water

c)

Oxygen

d)

Sunlight

14.

The Law of Conservation of Mass means that in an isolated system matter cannot be__________

a)

Created

b)

Disturbed

c)

Divided

d)

Balanced

15.

Sun’s radiant energy falls under which part of the electromagnetic spectrum?

a)

Ling-Waves

b)

Gamma Rays

c)

Visible Light

d)

X-Rays

16.

Light dependent reactions take place in the thylakoid membrane of which plant organelle?

a)

thylakoid membrane

b)

stroma

c)

chloroplast

d)

chlorophyll

17.
The ____________ is the most photosynthetic part of a plant.
a)
leaf
b)
flower
c)
roots
d)
stem
18.
How can photosynthesis be related to cellular respiration?
a)
What's produced (made) by one is needed (the reactants) for the other
b)
They both produce the same products
c)
They both have the same reactants (need the same things)
d)
These 2 processes have nothing in common
19.
Which of these conditions would decrease the rate of photosynthesis in a plant?
a)
Above average precipitation
b)
Changing the daylight hours from 14 hrs to 10 hrs
c)
Changing the CO2 concentration from 380 ppm to 410 ppm
d)
All of these choices
20.
Which of the following is an example of an AUTOTROPH?
a)
Appletree
b)
Dog
c)
Mushroom
d)
Human
21.
Chlorophyll absorbs a higher percentage of _____ and _______ light.
a)
green and purple
b)
red and blue
c)
black and orange
d)
yellow and green
22.
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
23.
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.
24.
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).
25.
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.
26.
Which of the following carry out photosynthesis?
a)
bees
b)
red algae
c)
humans
d)
mushrooms
27.
Autotroph or heterotroph?
a)
Autotroph
b)
Heterotroph
28.
Autotroph or Heterotroph?
a)
Autotroph
b)
Heterotroph
29.
Autotroph or heterotroph?
a)
Autotroph
b)
Heterotroph
30.
Which gas is removed from the atmosphere during photosynthesis?
a)
hydrogen
b)
oxygen
c)
nitrogen
d)
carbon dioxide
31.
What are the bubbles rising in the test tube?
a)
nitrogen gas
b)
carbon dioxide gas
c)
glucose
d)
oxygen gas
32.
Plants need carbon dioxide from their environment to produce glucose during which stage of photosynthesis? 
a)
The light-dependent stage
b)
The light-independent stage (The Calvin Cycle)
c)
The electron transport chain
d)
ATP formation
33.
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.
34.
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
35.

Why do some leaves turn from green to red, orange, or yellow in the fall?

a)

Chlorophyll breaks down and its stored

b)

Chlorophyll production increases

c)

Chlorophyll leaks out of the leaves

d)

Chlorophyll changes colors in cool weather

36.
Which structures shown in the Figure make up the ADP molecule?
a)
A and B
b)
A, B and C
c)
A, B, C, and D
d)
C and D
37.
Using the figure, which parts of the molecule must the bonds be broken to form an ADP molecule?
a)
A and B
b)
B and C
c)
C and D
d)
all of the above
38.
Which contains the most energy?
a)
carbohydrates
b)
lipids
c)
proteins
d)
nucleic acids
39.
Which term is the part of photosynthesis which uses ATP from the first stage in order to produce glucose? Hint:  Occurs in the stroma!
a)
light- independent reactions
b)
cellular respiration
c)
light- dependent reactions
d)
 photosynthesis
40.
Which of the following is directly associated with Photosystem I?
a)
harvesting light energy to make ATP
b)
receiving electrons from the thylakoid membrane ETC
c)
generation of molecular oxygen
d)
extraction of hydrogen electrons from the splitting of water
41.
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
42.
Where are the molecules of the electron transport chain associated with photophosphorylation located in plant cells?
a)
thylakoid membanes of chloroplasts
b)
stroma of chloroplasts
c)
matrix of mitochondria
d)
outer membrane of chloroplasts
43.
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
44.
In C3 photosynthesis, the reactions that require ATP take place in
a)
the light reactions alone
b)
the calvin cycle only
c)
both the light reactions and the calvin cycle
d)
the citric acid cycle
45.
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
46.
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, ℗i, 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.
47.
CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they
a)
fix CO2 into organic acids during the night when temperatures are cooler.
b)
fix CO2 into by combining it with RuBP in the Calvin cycle.
c)
obtain CO2 through their roots during the day.
d)
fix CO2 into organic acids in the mesophyll cells, which do not rely on stomata.
48.
Compared to C3 plants, C4 plants
a)
) have higher rates of photorespiration.
b)
can continue to fix CO2 even at relatively low CO2 concentrations and high oxygen concentrations.
c)
do not use rubisco for carbon fixation.
d)
grow better under cool, moist conditions.
49.
In chemiosmosis in mitochondria, protons flow from the intermembrane space into the matrix, whereas in chemiosmosis in chloroplasts, protons flow from
a)
stroma into the cytosol
b)
stroma to the thylakoid space
c)
thylakoid space to the stroma
d)
intermembrane space to the stroma
50.

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

51.

•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)

52.

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

a)

1

b)

2

c)

3

d)

4

e)

5

53.

•Photosynthesis is a type of anabolic and exergonic reaction.

a)

True

b)

False

54.

Which statement is FALSE?

a)

Thylakoid membranes contain the photosynthetic pigments.

b)

The oxygen released during photosynthesis comes from water.

c)

RuBP is produced during cyclic photophosphorylation in the light dependent reactions.

d)

The light dependent reactions provide the energy for the Calvin cycle.

55.

Red and blue light support the highest rates of photosynthesis because …

a)

Chlorophylls absorb light of these wavelengths more than other wavelengths.

b)

These are the only wavelengths that carotenoids cannot absorb.

c)

Light of these wavelengths have the highest energy in the visible spectrum.

d)

Light of these wavelengths activate the ATP synthase enzyme.

56.

Which of the following plants fixes carbon dioxide at night?

a)

Sugarcane.

b)

Cactus.

c)

Oryza sativa.

d)

Hibiscus rosa-sinensis.

57.

Light independent reaction involves …

I O2 fixation.

II Endergonic reaction.

III Reduction and regeneration of RuBP.

a)

I only.

b)

III only.

c)

I and II.

d)

II and III.

58.

In C3 photosynthesis, the electron donor for the light dependent reaction is

a)

carbon dioxide

b)

oxygen

c)

RuBP

d)

water

59.

Oxygen is released as a result of photosynthesis. Oxygen is a by-product of which of the following?

a)

chemiosmosis

b)

splitting the water molecules

c)

the electron transfer system of photosystem I

d)

the electron transfer system of photosystem II

60.

The reaction-center chlorophyll of photosystem I is known as P700 because

a)

it absorbs 700 photons per microsecond.

b)

it reflects light with a wavelength of 700 nm.

c)

there are 700 chlorophyll molecules in the center.

d)

it best at absorbing light with a wavelength of 700 nm.

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