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Photosynthesis

Total questions: 73

Worksheet time: 37mins

Name
Class
Date
1.

Plants and other autotrophs are producers of...

a)

Biosphere

b)

Ecosystem

c)

Ecology

d)

Biology

2.

_____use light energy to make organic molecules

a)

Photoautotrophs

b)

Heterotrophs

c)

Omnivores

d)

Dinosaurs

3.

Heterotrophs consume organic molecules from other organisms for energy and carbon

a)

True

b)

False

4.

Photosynthesis converts ______ energy to _______ energy of food

a)

Light; potential

b)

Chemical; light

c)

Light; chemical

d)

Kinetic; Potential

5.

What are the sites of photosynthesis in plants?

a)

Granum

b)

Thylakoids

c)

Stroma

d)

Chloroplasts

6.

Mesophyll are chloroplasts mainly found in leaf cells

a)

True

b)

False

7.

What are pores in leaf cells where CO2 enter and O2 exits

a)

Stomata

b)

Stroma

c)

Mesophyll

d)

Chlorophyll

8.

The green pigment in thylakoid membranes of chloroplasts are called

a)

Carotene

b)

Chloroplasts

c)

Mesophyll

d)

Vein

9.

What is the equation for photosynthesis?

a)

CO2 + H20 + Light Energy --> C6H12O6 + O2

b)

6O2 + 6H20 + Light Energy --> C6H12O6 + 6CO2

c)

6CO2 + 6H20 + Light Energy --> C6H12O6 + 6O2

d)

6CO2 + 6H20 + Light Energy --> C6H12O6 + 9O2

10.

What is the Redox reaction of photosynthesis

a)

Water is split

b)

e- transferred with H+ to CO2--->sugar

c)

Water is reduced

d)

Glucose is oxidized

11.

What enabled researchers to track atoms through photosynthesis (van Niel)

a)

Evidence that chloroplasts split water molecules

b)

Evidence that chloroplasts reduced CO2

c)

The plants reflect green light

d)

Plants absorb red, violet, and blue light

12.

Light reactions convert solar energy to chemical energy of ATP and NADPH

a)

True

b)

False

13.

Longer wavelength=higher energy

a)

True

b)

False

14.

(blue-green) light reaction, converts solar

to chemical energy

a)

Chlorophyll A

b)

Chlorophyll B

c)

Carotenoids

d)

Anthocyanin

15.

(yellow-green): conveys E to chlorophyll a

a)

Chlorophyll A

b)

Chlorophyll B

c)

Carotenoids

d)

Anthocyanin

16.

(yellow, orange): photoprotection, broaden

color spectrum for photosynthesis

a)

Chlorophyll A

b)

Chlorophyll B

c)

Carotenoids

d)

Anthocyanin

17.

(red, purple, blue): photoprotection,

antioxidants

a)

Chlorophyll A

b)

Chlorophyll B

c)

Carotenoids

d)

Anthocyanin

18.

What determine the effectiveness of different wavelengths for photosynthesis?

a)

Absorption spectrum

b)

Reflection Spectrum

c)

Refracting prism

d)

Transmittance spectrum

19.

Action Spectrum plots rate

of photosynthesis vs.

wavelength

a)

True

b)

False

20.

Engelmann used bacteria to measure rate of photosynthesis in _____

a)

Algae

b)

Fungi

c)

Animals

d)

Kelp

21.

What wavelengths of light are most effective in driving photosynthesis?

a)

Red

b)

Violet

c)

Blue

d)

Green

22.

Light energy splits H2O to O2 releasing _____

energy ______

a)

High; electrons

b)

High; protons

c)

Low; electrons

d)

Low; protons

23.

The movement of e- is used to generate ATP

a)

True

b)

False

24.

Electrons end up on ________, reducing it to

_______

a)

NADPH; NADP+

b)

NADP+; NADPH

c)

CO2, gluocose

d)

FAD+, FADH2

25.

Electrons in chlorophyll molecules are

excited by reflection of light

a)

True

b)

False

26.

reaction center & light-harvesting

complexes (pigment + protein)

a)

Photosystem

b)

Chlorophyll

c)

Stroma

d)

Photon

27.

What are the two routes for electron flow?

a)

Linear (noncyclic) electron flow

b)

Triangular electron flow

c)

Cyclic electron flow

d)

Cubed electron flow

28.

When the chlorophyll is excited by light absorption, energy is passed to the reaction center of ____________ (protein + chlorophyll a)

a)

Photosystem II

b)

Photosystem I

c)

Primary electron acceptor

d)

Mitochondria

29.

During the linear electron flow, e- are captured by the _____

a)

Stroma

b)

Primary electron acceptor

c)

Dark reactions

d)

Chloroplasts

30.

How are the e- replaced during linear electron flow?

a)

H20 splits---> O2 formed

b)

O2 reduces into H20

c)

NADPH gives off electrons

d)

CO2 is reduced into glucose

31.

After e- move through PSII, they are passed to ____________ via ETC

a)

Photosystem II

b)

Photosystem I

c)

NADPH

d)

H20

32.

Energy transfer pumps H+ to the thylakoid space

a)

True

b)

False

33.

ATP is produced by _______________ and e- moves from PSI's ________________________to 2nd ETC. NADP+ is reduced to NADPH as well.

a)

photophosphorylation; primary electron acceptor

b)

Phosphorylation, reaction center

c)

NADPH, primary electron acceptor

d)

NADP+, reaction center

34.

What is the main idea of the light reactions?

a)

Convert H20 into O2

b)

Use solar energy to generate ATP & NADPH to provide energy for Calvin cycle

c)

Replace lost electrons

d)

Provide food for plants

35.

The cyclic electron flow uses _______ only and produces ONLY _____ for Calvin cycle

a)

Photosystem I; O2

b)

Photosystem I; NADPH

c)

Photosystem I; ATP

d)

Photosystem II; ATP

36.

Both respiration and photosynthesis use ___________to generate ATP

a)

Mitochondria

b)

Intermembrane space

c)

The stroma

d)

Chemiosmosis

37.

Proton motive force generated by:

a)

(1) H+ from water

b)

(2) H+ pumped across by cytochrome

c)

(3) Removal of H+ from stroma when NADP+ is reduced

d)

(4) Addition of H+ from stroma when NADPH is oxidized

38.

What uses ATP and NADPH to convert CO2 to sugar

a)

Light reactions

b)

Calvin Cycle

c)

Krebs Cycle

d)

Photosystems

39.

The Calvin cycle occurs in the _______, produces ATP, NADPH, _____, and 3-C sugar _____

a)

Stroma, CO2, G3P

b)

Thylakoids, O2, G3P

c)

Stroma, CO2, 3GP

d)

Thylakoids, CO2, RuBP

40.

What are the three phases of the Calvin cycle?

a)

Carbon fixation

b)

Reduction

c)

Regeneration of RuBP (CO2 acceptor)

d)

Oxidation

41.

In phase 1 of the Calvin Cycle, 3 CO2 are added to RuBP and catalzyed by the enzyme ________

a)

Lactase

b)

Rubisco

c)

PEP carboxylase

d)

Maltase

42.

Phase 2 of the Calvin Cycle uses 6 ATP and 6 NADPH to produce 1 net ___

a)

G3P

b)

Rubisco

c)

RuBP

d)

Pi

43.

Phase 3 of the Calvin Cycle uses 3 ATP to regenerate _____

a)

Rubisco

b)

G3P

c)

RuBP

d)

CO2

44.

Photorespiration is a metabolic pathway which uses O2 & produces CO2, uses ATP, and there's no sugar production (rubisco binds O2---> breakdown of RuBP

a)

True

b)

False

45.

Photorespiration occurs on cold, dry dark days when stomata close (conserve H2O)

a)

True

b)

False

46.

In C3 plants, CO2 is fixed to a ____ compound in the Calvin Cycle (Ex. Rice, wheat, soybeans)

a)

2-C

b)

3-C

c)

4-C

d)

5-C

47.

In C4 plants, CO2 is fixed to a ___ compound (Ex. corn, sugarcane, grass)

a)

2-C

b)

3-C

c)

4-C

d)

5-C

48.

What are the two cell types of C4 plants?

a)

Vein

b)

Mesophyll

c)

Bundle Sheath

d)

Chlorophyll

49.

PEP carboxylase fixes CO2 (4-C), pump CO2 to bundle sheath

a)

Mesophyll

b)

Bundle Sheath

50.

CO2 used in Calvin Cycle

a)

Mesophyll

b)

Bundle Sheath

51.

Which type of plants open their stomata at night-->CO2 enters---> converts to organic acid, which is stored in mesophyll cells and in the day, their stomata is closed--> light reactions supply ATP, NADPH; CO2 released from organic acids for Calvin Cycle (Ex, cacti, pineapples)

a)

C3

b)

C4

c)

CAM

52.

Which type of plant perform C fixation & Calvin together?

a)

C3

b)

C4

c)

CAM

53.

Which type of plant performs C fixation & Calvin

in different cells?

a)

C3

b)

C4

c)

CAM

54.

Which type of plant performs C fixation & Calvin

at different TIMES?

a)

C3

b)

C4

c)

CAM

55.

What embedded protein complex found in the thylakoids membrane uses excited e- to reduce NADP+ into NADPH

a)

Photosystem I

b)

Photosystem II

c)

ATP Synthase

56.

What embedded protein complex found in the thylakoid membrane provides excited e- to the ETC

a)

Photosystem I

b)

Photosystem II

c)

ATP synthase

57.

What embedded protein complex found the the thylakoid membrane converts ADP to ATP using free energy from a flow of H+?

a)

Photosystem I

b)

Photosystem II

c)

ATP Synthase

58.

What is the source of replacement electrons for those released from Photosystem II

a)

From split H2O

b)

From e- that completed the ETC

c)

From CO2

d)

From NADPH

59.

What is the source of replacement electrons for those released from photosystem two

a)

From split H2O

b)

From e- that completed the ETC

c)

From CO2

d)

From NADPH

60.

Carbon dioxide is involved in the light-dependent reaction

a)

True

b)

False

61.

Where do the ATP and NADPH produced during the light dependent reactions go when the process is complete?

a)

Granum

b)

Calvin Cycle

c)

PS I

d)

Home

62.

Each RuBP molecule contains 5 carbon atoms. How many RuBP molecules are used in one turn of the Calvin Cycle?

a)

3

b)

6

c)

4

d)

2

63.

How many CO2 molecules are used in one turn of the Calvin cycle?

a)

1

b)

2

c)

3

d)

4

64.

How many PGA molecules are made in one turn of the Calvin cycle?

a)

3

b)

4

c)

5

d)

6

65.

What happened to the carbon Adams from the carbon dioxide molecules that entered the Calvin cycle?

a)

Oxidized

b)

Incorporated into PGA molecules

c)

Nothing

d)

combined with H2O

66.

PGA molecules are reduced into PGAL by losing and oxygen. What types and how many molecules provide the free energy necessary for the reduction of the PGA molecules?

a)

6 ATP

b)

3 NADPH

c)

6 NADPH

d)

3 ATP

67.

How many Water molecules are produced of the reduction phase of the Calvin cycle

a)

4

b)

5

c)

6

d)

7

68.

How many PGAL molecules continue onto the reduction phase of the Calvin cycle?

a)

4

b)

5

c)

6

d)

7

69.

What molecule is regenerated during the regeneration phase of the Calvin cycle?

a)

Rubisco

b)

CO2

c)

RuBP

d)

G3P

70.

What happens to the PGAL/G3P molecule that does not continue on in the Calvin cycle?

a)

It oxidizes back into PGA

b)

Used by the cell to make glucose

c)

Goes to the light reaction

d)

Nothing

71.

How many G3P molecules will it take to make one molecule of glucose?

a)

1

b)

2

c)

3

d)

4

72.

How many turns of the Calvin cycle will it take to make one molecule of glucose

a)

1

b)

2

c)

3

d)

4

73.

Order these words chronologically in the order in which the energy flow occurs:

electrons Glucose ATP Sunlight

a)

Sunlight—>e- —> ATP—> Glucose

b)

Sunlight—>ATP—> e- —> Glucose

c)

e- —>sunlight —> ATP—> Glucose

d)

Sunlight—>e- —> Glucose—> ATP