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AP Bio Unit 6 Photosynthesis

Total questions: 53

Worksheet time: 34mins

Name
Class
Date
1.
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
2.
What supplies the electrons that are lost in PS I?
a)
the electrons from PS II
b)
water
c)
glucose
d)
oxygen
3.
Which of the following molecules is not needed for the Calvin Cycle?
a)
CO2
b)
ATP
c)
NADPH
d)
H2O
4.
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
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.
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
7.
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
8.
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
9.

How many 6-carbon sugar molecules are produced from every six molecules of carbon dioxide that enter the Calvin cycle?

a)

1

b)

3

c)

6

d)

12

10.

The H+ concentration gradient is formed to

a)

make NADPH

b)

split a water molecule

c)

generate ATP

d)

form water

11.

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

12.

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

13.

Which of the following would have the least affect on photosynthetic rate?

a)

increase the temp from 20°C to 30°C

b)

increasing the CO2 from 400 ppm to 600ppm

c)

increasing the light intesity from 40 Watts to 60 Watts

d)

increasing the amount of O2 from 20% to 30% in the air

14.

During noncyclic photophosphorylation all of the following occur EXCEPT

a)

ATP is made using electron energy that will leave on NADPH

b)

results in oxygen gas being produced

c)

water is split (photolysis)

d)

electrons from photosystem 1 return back to photosystem 1

15.

How are we able to see the color white?

a)

All colors except red are absorbed

b)

All colors are absorbed

c)

All colors are reflected

d)

All colors except red are reflected

16.

Of the visible spectrum, what color has the longest wavelength?

a)

Blue

b)

Green

c)

Yellow

d)

Red

e)

Violet

17.

A blue dish appears blue because it

a)

absorbs blue light

b)

absorbs white light

c)

reflects white light

d)

reflects blue light

18.

Which color has the shortest wavelength?

a)

Red

b)

Orange

c)

Green

d)

Violet

19.

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

20.

Which of the following light color is absorbed by plants?

a)

Red

b)

Green

c)

yellow

d)

Light green

21.

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

22.

•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)

23.

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

a)

1

b)

2

c)

3

d)

4

e)

5

24.
What are the products of photosynthesis?
a)
water and carbon dioxide
b)
oxygen and glucose
c)
oxygen and carbon dioxide
d)
oxygen and water
25.
What molecule absorbs sunlight for photosynthesis?
a)
chloroplast
b)
thylakoid
c)
grana
d)
chlorophyll
26.
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 
c)
The electron transport chain
d)
ATP formation
27.
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
28.
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
29.
What is the primary function of cyclic electron flow?
a)
to produce additional NADPH
b)
to produce additional ATP
c)
to produce additional oxygen
d)
to produce additional carbon dioxide
30.
In a plant cell, where are ATP synthase complexes located?
a)
thylakoid membranes only
b)
inner mitochondrial membranes only
c)
thylakoid membrane and inner mitochondrial membranes
d)
thylakoid membrane and plasma membranes
31.
Which of the following statements about the relationship between photosynthesis and cellular respiration is true?
a)
In cellular respiration the biochemical pathways of photosynthesis run in reverse.
b)
In photosynthesis the biochemical pathways of cellular respiration run in reverse.
c)
Cellular respiration occurs only in animals and photosynthesis occurs only in plants.
d)
Cellular respiration is catabolic and photosynthesis is anabolic.
32.
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
33.
In photosynthetic cells, synthesis of ATP by chemiosmosis occurs during
a)
photosynthesis only
b)
cellular respiration only
c)
both photosynthesis and cellular respiration
d)
photophosphorylation only
34.
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.
35.
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.
36.
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
37.
The disks in the chloroplast are called:
a)
Lamellae
b)
Grana
c)
Stroma
d)
Thylakoids
38.
The interior space of the chloroplast is called:
a)
Lamellae
b)
Grana
c)
Stroma
d)
Thylakoids
39.
What supplies the electrons that are lost in PS I?
a)
the electrons from PS II
b)
water
c)
glucose
d)
oxygen
40.

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

41.

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

42.

During noncyclic photophosphorylation all of the following occur EXCEPT

a)

ATP is made using electron energy that will leave on NADPH

b)

results in oxygen gas being produced

c)

water is split (photolysis)

d)

electrons from photosystem 1 return back to photosystem 1

43.

As a research scientist, you measure the amount of ATP and NADPH consumed by the Calvin cycle in 1 hour. You find 30,000 molecules of ATP consumed, but only 20,000 molecules of NADPH. Where did the extra ATP molecules come from?

a)

photosystem I

b)

photosystem II

c)

cyclic electron flow

d)

non-cyclic electron flow

44.

A flask containing photosynthetic green algae and a control flask containing water with no algae are both placed under a bank of lights, which are set to cycle between 12 hours of light and 12 hours of dark. The dissolved oxygen concentrations in both flasks are monitored. Predict what the relative dissolved oxygen concentrations will be in the flask with algae compared to the control flask.

a)

The dissolved oxygen in the flask with algae will be higher in the light, but the same in the dark.

b)

The dissolved oxygen in the flask with algae will be higher in the light, but lower in the dark.

c)

The dissolved oxygen in the flask with algae will always be higher.

d)

The dissolved oxygen in the flask with algae will always be lower.

45.

What would be the expected effect on plants if the atmospheric CO2 concentration was doubled?

a)

All plants will experience increased rates of photosynthesis.

b)

C3 plants will have faster growth; C4 plants will be minimally affected.

c)

C4 plants will have faster growth; C3 plants will be minimally affected.

d)

C3 plants will have faster growth; C4 plants will have slower growth.

46.

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.

b)

fix CO2 into sugars in the bundle-sheath cells.

c)

fix CO2 into pyruvate in the mesophyll cells.

d)

use photosystem I and photosystem II at night.

47.

If the carbon atom of each of the incoming CO2 molecules is labeled with a radioactive isotope of carbon, which organic molecules will be radioactively labeled after one cycle?

a)

C only

b)

B, C, D and E

c)

C, D and E

d)

B and C only

48.

To identify the molecule that accepts CO2, Calvin and Benson manipulated the carbon-fixation cycle by either cutting off CO2 or cutting off light from cultures of photosynthetic algae. They then measured the concentrations of various metabolites immediately following the manipulation. How would these experiments help identify the CO2 acceptor? Study Figure 8.2 to help you in determining the correct answer.

a)

The CO2 acceptor concentration would decrease when either the CO2 or light is cut off.

b)

The CO2 acceptor concentration would increase when either the CO2 or light is cut off.

c)

The CO2 acceptor concentration would increase when the CO2 is cut off, but decrease when the light is cut off.

d)

The CO2 acceptor concentration would decrease when the CO2 is cut off, but increase when the light is cut off.

49.

In the process of carbon fixation, RuBP attaches a CO2 to produce a 6 carbon molecule, which is then split in two. After phosphorylation and reduction, what more needs to happen in the Calvin cycle?

a)

a gain of NADPH.

b)

regeneration of RuBP.

c)

regeneration of rubisco.

d)

all the G3P produced will leave the cycle.

50.

Photorespiration involves

a)

the production of oxygen gas during the break down of sugar

b)

the breakdown of sugar when CO2 levels are low.

c)

the production of massive amounts of ATP in the thylakoid

d)

water being pulled out of the plant

51.

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

52.

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

a)

C3 plants

b)

C4 plants

c)

CAM plants

53.

Which plant LACKS CO2 storage method

a)

C3

b)

C4

c)

CAM

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