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Photosynthesis 2021

Total questions: 52

Worksheet time: 52mins

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 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
3.
Which of the following molecules is not needed for the Calvin Cycle?
a)
CO2
b)
ATP
c)
NADPH
d)
H2O
4.
Green plants reflect ________ light.
a)
Red
b)
Green
c)
All
d)
Red and Violet
5.
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
6.
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
7.
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
8.
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
9.
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
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.

ATP is made during the light reaction using all of the following EXCEPT

a)

proton pump

b)

hydrogen ion gradient

c)

electron energy from photosystem II

d)

NADPH donating electrons

15.

Plants use the following reactants for the light reaction

a)

Water and CO2

b)

Water and NADPH

c)

Water and NADP+

d)

NADPH and ATP

16.

Photosynthesis goal is to

a)

convert light energy into glucose energy

b)

use light energy to make oxygen gas

c)

convert sugar energy into ATP

d)

convert sugar energy into oxygen gas

17.

The NADP+ is

a)

oxidized during the light reaction

b)

reduced during the light reaction

c)

oxidized during the Calvin cycle

d)

reduced during the Calvin cycle

18.

Photosystems are made of

a)

chloroplasts

b)

chromosomes

c)

chlorophyll

d)

cytoplasm

19.

What is FALSE about the calvin cycle

a)

uses the light reactions products

b)

produces a three carbon sugar (G3P)

c)

produces carbon dioxide

d)

produces NADP+

20.

The calvin cycle requires what substances from the light reaction?

a)

CO2 and Water

b)

light and CO2

c)

ATP and NADPH

d)

glucose and O2

21.
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
22.
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
23.
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
24.
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.
25.
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
26.
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
27.
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.
28.
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.
29.
Which of the following molecules is not needed for the Calvin Cycle?
a)
CO2
b)
ATP
c)
NADPH
d)
H2O
30.
Plants with the largest amount of which pigment will be best suited for growing conditions where light has a green hue.
a)
Chlorophyll A
b)
Chlorophyll B
c)
Carotenoids
d)
A combination of all 3
31.
The H+ concentration gradient is used to 
a)
make NADPH
b)
split a water molecule
c)
generate ATP
d)
form water
32.
Which of the following is NOT a product of the light reactions?
a)
ATP
b)
NADPH
c)
Oxygen
d)
Glucose
33.
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
34.

In PS II of the light dependent reactions, photons from sunlight excite electrons in the chlorophyll molecules which them enter the ETC. What replaces these electrons lost form the chlorophyll?

a)

electrons from PS I

b)

electrons released when water is split

c)

electrons from NADPH

d)

electrons from reduction of carbon dioxide

35.

Carbon fixation is the process of taking inorganic carbon in ___ and incorporating it into an organic carbon compound. This occurs in the Calvin Cycle.

a)

the soil

b)

the water

c)

carbon dioxide

36.

RuBP is an important part of the Calvin Cycle. This compound combines with ___ to form a 6-carbon compound that ultimately breaks down into 2 PGA molecules.

a)

water

b)

NADPH

c)

carbon dioxide

d)

G3P

37.

H+ build up a gradient across the thyakoid membrane. They then flow back through _____, generating ATP.

a)

the membrane

b)

the stroma

c)

ATP synthase

38.

Where does photoactivation of electrons take place

a)

Photosystems I and II

b)

Photosystem I only

c)

Photosystem II only

d)

Electron Transfer Chain

39.

What is the green pigment in plants called?

a)

carotene

b)

chlorophyll

c)

xanthophyll

d)

anthocyanin

40.

What colors of light are used least during photosynthesis

a)

red & green

b)

orange & blue

c)

blue & red

d)

green & yellow

41.

When I see a red color on a shirt, what has happened?

a)

All colors of the visible light spectrum are being absorbed and red is being reflected

b)

All colors of the visible light spectrum are being reflected and red is being absorbed

42.

What wavelength of light is this plant pigment reflecting?

a)

375 - 525

b)

300- 350

c)

420 - 500

d)

200 - 600

43.

The primitave earth had limited anounts of:

a)

water

b)

sugar

c)

CO2

d)

O2

44.

Photosynthesis firs evolved in:

a)

prokaryotes

b)

eukaryotes

c)

chloroplasts

d)

thylakoids

45.

_________________, ______________ are responsible for the production of an oxygenated atmosphere in the evolution of the earth

a)

eukaryotic, cyanobacteris

b)

eukaryotic, bacteria

c)

prokaryotic, obligate anaerobes

d)

prokaryotic , cyanobacteria

46.

During photosynthesis _________________ absorb energy from light, boosting electrons to a higher energy level

a)

NADP

b)

NADPH

c)

chlorophylls

d)

all are boosted

47.

Electrons are boosted to a higher energy level in

a)

PS I only

b)

PS II only

c)

PS I and PS II

d)

Neither

48.

The events in X are important to

a)

carbon fixation

b)

making sugar

c)

reducing NADPH

d)

regenerating RuBP

49.

The events in Y are important to

a)

carbon fixation

b)

making sugar

c)

reducing NADPH

d)

regenerating RuBP

50.

The events in Z are important to

a)

carbon fixation

b)

making sugar

c)

reducing NADPH

d)

add ATP to provide bond energy

51.

The events in V are important to

a)

carbon fixation

b)

making sugar

c)

reducing NADPH

d)

add ATP to provide bond energy

52.

The events in W are important to

a)

carbon fixation

b)

oxidize NADPH

c)

reducing NADPH

d)

add ATP to provide bond energy

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