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AP Biology Chapter 8: Photosynthesis

Total questions: 50

Worksheet time: 45mins

Name
Class
Date
1.
What is one function of the other pigments  besides chlorophyll, in the chloroplast?
a)
to block damaging wavelengths of light
b)
to absorb different wavelengths than the chloroplasts
c)
to provide different colors to the leaves
d)
to transfer energy to a separate photosystem beside the one using chlorophyll a and b.
2.
What is the primary function of the light reactions of photosynthesis?
a)
To produce glucose
b)
To produce NADPH and ATP
c)
To use ATP
d)
To produce RuBP
3.
What supplies the electrons that are lost in PS I?
a)
the electrons from PS II
b)
water
c)
glucose
d)
oxygen
4.
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
5.
Where does the carbon come from that is used to form glucose?
a)
The soil
b)
CO2 in the air
c)
From other carbohydrates
d)
Calvin Cycle
6.
The H+ concentration gradient is used to 
a)
make NADPH
b)
split a water molecule
c)
generate ATP
d)
form water
7.
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
8.
Which of the following is NOT a product of the light reactions?
a)
ATP
b)
NADPH
c)
Oxygen
d)
Glucose
9.

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

a)

thylakoid membrane

b)

lumen

c)

stroma

10.
What is made during the light independent reactions?
a)
ATP
b)
NADPH
c)
sugar
d)
fat
11.
Which of the following is the correct equation for PHOTOSYNTHESIS?
a)
CO2 + light + H2O --> O2 + glucose
b)
CO2 + glucose + H2O --> O2 + light
c)
O2 + light + H2O --> CO2 + glucose
d)
CO2 + O2 + H2O --> Light+ glucose
12.
Which of the following molecules is not needed for the Calvin Cycle?
a)
CO2
b)
ATP
c)
NADPH
d)
H2O
13.
The light reactions occur in the ________ and the dark reactions take place in the ________.
a)
Chloroplast / thylakoid membrane
b)
stroma / thylakoid
c)
mesophyl / stomata
d)
thylakoid membrane / stroma
14.
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
15.

If the proton (H+) pump in the thylakoid was not working which molecule could not be made during the light reaction?

a)

NADPH

b)

ATP

c)

Water

d)

Oxygen gas

16.
Since we're building a carbohydrate in the Calvin Cycle, is the process endergonic or exergonic and why?
a)
Endergonic because carbohydrate production is catabolic
b)
Exergonic because carbohydrate production is anabolic
c)
Endergonic because carbohydrate production is anabolic.
d)
Exergonic because carbohydrate production is catabolic
17.
__________ is a stack of thylakoids
a)
Granum
b)
Stomata
c)
Stroma
d)
Chloroplast
18.

Electrons become energized during photosynthesis when

a)

they are absorbed by water

b)

they undergo carbon fixation

c)

they are struck with light energy

d)

they are incorporated into oxygen

19.

Carbon fixation

a)

is part of the Krebs Cycle

b)

is part of the Calvin Cycle

c)

is part of the ETC

d)

is part of the Light Reactions

20.

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.

21.

What product of the light-dependent reactions is used in the Calvin cycle?

a)

Oxygen

b)

Carbon Dioxide

c)

H2O

d)

ATP

22.

The Calvin Cycle Includes...

a)

The light-dependent reactions.

b)

The light-independent reactions.

c)

an electron transport chain

d)

photosynthesis

23.

6CO2 + 6H2O ® C6H12O6 + 6O2

This chemical equation describes:

a)

Cellular respiration

b)

Glycolysis

c)

Photosynthesis

d)

Photolysis

e)

Electron Transport Chain

24.

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

25.

Where does dark reaction or light independent specifically occur?

a)

thylakoid membrane

b)

Stroma of the chloroplast

c)

Grana

d)

nuclear membrane

26.

Where does light dependent specifically occur?

a)

thylakoid membrane of the grana

b)

Stroma of the chloroplast

c)

mitochondria

d)

nuclear membrane

27.

What is NOT the product of light dependent reaction?

a)

ATP

b)

NADPH

c)

H2O

d)

O2

28.

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

29.

•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)

30.

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

a)

1

b)

2

c)

3

d)

4

e)

5

31.

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

32.
Which of the following is NOT a reactant (ingredient) for the process of photosynthesis?
a)
Carbon Dioxide
b)
Water
c)
Energy
d)
Oxygen
33.
How do CAM plants photosynthesize under bright, hot conditions without drying out?
a)
by allowing small openings in their leaves to admit more carbon dioxide
b)
by lowering the amount of ATP required for the Calvin cycle
c)
by using the C4 pathway
d)
by sealing their leaves against water loss and trapping carbon as organic acids
34.
What is the function of NADPH and ATP in the Calvin cycle?
a)
They provide the energy required to build high-energy sugars
b)
They provide the energy to create needed oxygen
c)
They provide the energy required to release water
d)
They provide the energy required to expel CO2
35.
cluster of chlorophyll and proteins found in thylakoids
a)
photosystem
b)
electron transport chain
c)
ATP synthase 
d)
Calvin cycle 
36.
series of electron carrier proteins that shuttle high-energy electrons during ATP-generating reactions
a)
electron transport chain
b)
photosystem
c)
ATP synthase
d)
Calvin cycle
37.
Plants that have adapted to extremely bright and dry conditions:
a)
C1 and C4
b)
C2 an CAM
c)
C1 and C2
d)
C4 and CAM
38.
Pathway, which requires extra energy; enables photosynthesis to keep working under intense light and high temperatures by first forming a compound containing 4 carbons (corn, sugarcane, and sorghum)
a)
C1
b)
C3
c)
C4
d)
CAM
39.
How do CAM plants photosynthesize under bright, hot conditions without drying out?
a)
by allowing small openings in their leaves to admit more carbon dioxide
b)
by lowering the amount of ATP required for the Calvin cycle
c)
by using the C4 pathway
d)
by sealing their leaves against water loss and trapping carbon as organic acids
40.

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

41.
What supplies the electrons that are lost in PS I?
a)
the electrons from PS II
b)
water
c)
glucose
d)
oxygen
42.

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)

splitting carbon dioxide molecules

43.

Which option best explains how photosystem II produces a high energy molecule?

a)

excited electrons from chlorophyll pass though an ETC and are captured by NADP+ to make NADPH.

b)

excited electrons from chlorophyll pass though an ETC that pumps H+ into the thylakoid. ATP synthase uses the H+ concentration gradient to make ATP.

c)

excited electrons from chlorophyll pass though an ETC that pumps H+ into the thylakoid. The H+ is used to convert NADP+ to NADPH.

44.

What supplies the electrons that are lost in PS II?

a)

the electrons from PS II

b)

water

c)

glucose

d)

oxygen

45.

What would be true for a plant that is growing (gaining mass)?

a)

rate of photosynthesis = rate of cellular respiration

b)

rate of photosynthesis > rate of cellular respiration

c)

rate of photosynthesis < rate of cellular respiration

46.

What would be true for a plant that is kept in the dark? What would happen to the plant's mass?

a)

rate of photosynthesis = rate of cellular respiration ; stay the same

b)

rate of photosynthesis > rate of cellular respiration ; decrease

c)

rate of photosynthesis < rate of cellular respiration ; decrease

47.

What is carbon fixation?

a)

The reaction that bonds a carbon from CO2 in the air to an existing organic molecule inside a plant cell.

b)

When carbon dioxide is split to release electrons for the ETC and the production of ATP.

c)

When ATP synthase adds carbon from CO2 to a five carbon sugar to produce a molecule of ATP

48.

Which of the options below best describes photosynthesis?

a)

exergonic; positive delta G

b)

endergonic; negative delta G

c)

endergonic; positive delta G

d)

exergonic; negative delta G

49.

What most likely causes the trends in oxygen concentration shown in the graph above?

a)

The water becomes colder at night and thus holds more oxygen.

b)

Respiration in most organisms increases at night.

c)

More organisms are respiring at night than during the day.

d)

Photosynthesis produces more oxygen than is consumed by respiration during the day.

50.

How are reactions in photosynthesis similar to reactions in cellular respiration?

a)

Both use H+ concentration gradients produced by ETC's to generate ATP.

b)

Both use pigments that absorb photons and oxidize water.

c)

Both oxidize glucose to produce electron carrier molecules

d)

Both processes are exergonic

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