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Photosynthesis By Dr, Veena Sachdeva

Total questions: 40

Worksheet time: 30mins

Name
Class
Date
1.

Which organelle stores water for use in photosynthesis?

a)

Chloroplast

b)

Cell Membrane

c)

Vacuole

d)

Nucleus

2.

How does most of the water needed by the plant get into its leaves?

a)

It enters through the stomata

b)

The roots absorb it and then it travels up the stem

c)

It's made during a chemical reaction in the leaf

d)

The flowers capture water and deliver it to the leaves

3.
How does carbon dioxide get into the leaves of a plant?
a)
It's absorbed by the roots
b)
It's made in a chemical reaction in the stem
c)
It enters through the stomata
d)
It goes through the flowers
4.
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
5.

Which of the following is the correct equation for PHOTOSYNTHESIS?

a)

light + carbon dioxide + water --> glucose + oxygen

b)

carbon dioxide + sugar + water --> oxygen + light

c)

oxygen + light + water --> carbon dioxide + sugar

d)

carbon dioxide + oxygen + water --> Light+ Sugar

6.
The energy released from sugar was once energy from what?
a)
The energy from sugar was once energy from water.
b)
The energy from sugar was once energy from the air.
c)
The energy from sugar was once energy from the sun.
d)
The energy from sugar was once energy from an iPad battery.
7.
What molecule absorbs sunlight for photosynthesis?
a)
chloroplast
b)
thylakoid
c)
grana
d)
chlorophyll
8.
Use the diagram to answer the question. Between which parts of the molecule must the bonds be broken to form an ADP molecule?
a)
A and B
b)
A and C
c)
B and C
d)
C and D
9.
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
10.
Where do the light-dependent reactions occur? 
a)
thylakoid membrane
b)
stroma
c)
mesophyll
d)
mitochondria
11.
Where does the Calvin Cycle occur?
a)
thylakoid
b)
stroma
c)
lumen
d)
mitochondria
12.
Which of these would be considered a C4 Pathway plant?
a)
cactus
b)
sugar cane
c)
oak tree
d)
aglae
13.
Which of these would be considered a CAM pathway plant?
a)
cactus
b)
corn
c)
elm tree
d)
algae
14.
In the Calvin Cycle, which enzyme helps keep the cycle going?
a)
Hydrolase
b)
Rubisco
c)
Pepsisco
d)
Re-starterase
15.
Which term is the part of photosynthesis when light energy is captured and transferred to a molecule, such as ATP?
a)
light- independent reactions
b)
cellular respiration
c)
light- dependent reactions
d)
 photosynthesis
16.
What supplies the electron that is lost in PS II?
a)
oxygen
b)
water
c)
glucose
d)
rubisco
17.
Chlorophyll is green because
a)
it absorbs green wavelengths of light
b)
it absorbs blue and yellow wavelengths of light
c)
it reflects green wavelengths of light
d)
it is an optical illusion caused by the transmission of light
18.
This molecule helps add a phosphate do a depleted energy molecule.
a)
PS 2
b)
PS 1
c)
Electron Transport Chain
d)
ATP Synthase
19.
After the electron leave PS II, where does it go next?
a)
Electron Transport Chain
b)
NADPH Reductase
c)
PS I
d)
Stroma
20.
What is the first stop in photosynthesis process?
a)
Photosystem I
b)
Photosystem II
c)
Electron Transport Chain
d)
stroma
21.

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
22.
a)
Stroma
b)
Thylakoid
c)
Skittle
d)
Grana
23.

If carbon dioxide is completely removed from a plant’s environment, what would you expect to happen to the plant’s production of Glucose?

a)

Glucose production will increase.

b)

Glucose will not be produced.

c)

The rate of glucose production will decrease .

d)

Fewer glucose will be produced at first, but then the plant will recover.

24.
If we enclosed a plant in an air-proof bottle, what would happen to the rate of photosynthesis 
a)
Gradually slow down to zero because CO2 is used up
b)
Shows a constant rate as long as the light remains on
c)
Gradually speeds up because O2 builds up
d)
Gradually slows down because glucose builds up
25.
How do plants, specifically their leaves, use lipids?
a)
as a main energy source
b)
As a waxy cuticle that protects the leaf from UV rays
c)
As a way to prevent insects from eating the leaves
d)
as a way to absorb more water when it rains
26.
What group of pigments break down later in the year and give leaves their orange, red, and yellow colors?
a)
carotenoids
b)
chlorophyll a
c)
chlorophyll b
d)
rhodopsin
27.

How do C4 plants prevent photorespiration?

a)

they close the stomata during the day

b)

they fix CO2 during the night

c)

they fix CO2 in a cell that does not contain RubisCO

d)

they fix CO2 in the guard cells

28.

Why do CAM plants grow much slower than other plants?

a)

they live in areas that do not have a lot of sunlight

b)

they live in areas that do not have a lot of water

c)

they can only fix CO2 during the night hours

d)

they can only fix CO2 during the day hours

29.

What enzyme fixes CO2 in C4 and CAM plants?

a)

ATP synthase

b)

rubisCO

c)

PEP carboxylase

d)

lactase

30.

Cyclic photophosphorylation differs from non-cyclic photophosphorylation in that _____________ is not made from the process.

a)

ATP.

b)

PGAL.

c)

NADH.

d)

NADPH

31.

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.

32.

In CAM plants, carbon dioxide is fixed for the first time to …

a)

Ribulose bisphosphate.

b)

Phosphoenolpyruvate.

c)

Glyceraldehyde-3-phosphate.

d)

3-phosphoglycerate.

33.

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.

34.

Flattened sacs of internal membranes associated with photosynthesis are called …

a)

Chloroplasts.

b)

The stroma.

c)

Cristae.

d)

Thylakoids.

35.

The role of water molecule in light dependent reaction is to …

a)

Hydrolyse NADP+ at the end of the electron transport chain.

b)

Involve directly in the production of ATP.

c)

Replace the excited electron of reaction centre molecule in photosystem II.

d)

Involve directly in Calvin cycle.

36.

Which statement is FALSE?

a)

Thylakoid membranes contain the photosynthetic pigments.

b)

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

c)

The oxygen released during photosynthesis comes from water.

d)

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

37.

Which of the following plants fixes carbon dioxide at night?

a)

Sugarcane.

b)

Cactus.

c)

Oryza sativa.

d)

Hibiscus rosa-sinensis.

38.

In the thylakoid membranes, what is the main role of the antenna pigment molecules?

a)

To synthesise ATP from ADP and Pi.

b)

To concentrate photons inside the stroma.

c)

To pass electrons to ferredoxin and then NADPH

d)

To harvest photons and transfer light energy to the reaction-center chlorophyll.

39.

In C4 plants, reactions that fix CO2 into four-carbon compounds occur in …

a)

Guard cells.

b)

Mesophyll cells.

c)

Epidermal cells.

d)

Bundle-sheath cells.

40.

Flattened sacs of internal membranes associated with photosynthesis are called …

a)

Chloroplasts.

b)

The stroma.

c)

Cristae.

d)

Thylakoids.

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