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Photosynthesis in higher plants

Total questions: 55

Worksheet time: 27mins

Name
Class
Date
1.

Photosynthesis is –

a)

A physical process

b)

A chemical process

c)

A physio-chemical process

d)

An energy wasting process

2.

Photosynthesis is important because –

a)

It is an important source of all foods on earth

b)

It is responsible for the release of O2

c)

It is responsible for the release of O2 in the environment in night

d)

a and b

3.

Moll’s half leaf experiment proves that –

a)

Light is essential for photosynthesis

b)

CO2 is essential for photosynthesis

c)

O2 releases during photosynthesis

d)

Chlorophyll is essential for photosynthesis

4.

Who proved that vegetation purifies the air impured by burning of candle –

a)

Von Mayr

b)

De Saussure

c)

Sachs

d)

Joseph Priestley

5.

Who discovered the role of light and green parts of the plants in purifying the noxious air –

a)

Von Mayr

b)

De saussure

c)

Sachs

d)

Jan Ingenhousz

6.

Who found that in green parts of plant glucose is made and glucose is stored as starch –

a)

Sachs

b)

Arnon

c)

Arnold

d)

Englemann

7.

Who used prism, white light, green alga, Cladophora and aerobic bacteria and plotted the action spectra for photosynthesis

a)

Sachs

b)

Arnon

c)

Arnold

d)

Englemann

8.

Who proved that O2 comes from water, not from CO2 in photosynthesis? It was based on the experiment of photosynthesis in purple and green bacteria.

a)

Van Neil

b)

Englemann

c)

Arnold

d)

Arnon

9.

The expression “We are creatures of chloroplasts” means that –

a)

All life possesses chloroplast

b)

All life depends ultimately on photosynthesis

c)

Chloroplasts are models of all cell organelles

d)

a and c

10.

The main photosynthetic pigments in plants are –

a)

Chl a and Chl c

b)

Chl a and Chl b

c)

Chl x and Chl y

d)

Retinal pigments and accessory pigments

11.

The main purpose of photosynthesis is to –

a)

Consume CO2

b)

Produce ATP

c)

Convert light energy into chemical energy

d)

Produce starch

12.

Name the pigment which is converted into vitamin A in animals & humans.

a)

Alpha- carotene

b)

Beta -carotene

c)

Gamma -carotene

d)

Chlorophyll a

13.

Mark out the incorrect statement.

a)

PS II is found in both grana and stroma lamellae

b)

PS II is involved in photolysis of water

c)

PS I participates in both cyclic as well as non-cyclic flow of electrons.

d)

The reaction centre in PS II is P680

14.

An external source of electrons is not required in

a)

Cyclic photophosphorylation

b)

Non-cyclic photophosphorylation

c)

Z-scheme of flow of electrons

d)

All of these

15.

Action spectrum of photosynthetic pigments was studied by Englemann on _______ in the presence of _______ bacteria.

a)

Spirogyra, Anaerobic

b)

Cladophora, aerobic

c)

Chlorella, Aerobic

d)

Scenedesmus, Anaerobic

16.

Anoxygenic and oxygenic photosynthesis are respectively shown by

a)

green algae and red algae

b)

Red algae and monocots

c)

Pigmented sulphur bacteria &cyanobacteria

d)

BGA and higher plants

17.

Select incorrect statement.

a)

Each photosystem has all the pigments except one molecule of chlorophyll a

b)

Action spectra is greater in blue and red light.

c)

Chlorophyll a and b are chief pigments associated with photosynthesis

d)

PS II is involved in evolution of O2.

18.

Primary electron acceptor in cyclic photophosphorylation is

(a) (b) (c) (d)

a)

Phaeophytin

b)

Fe-S

c)

PC

d)

Cyt-b6-f complex

19.

Stroma lamella membrane lacks

a)

PS I only

b)

PS II only

c)

PS I & ETS

d)

PS II & NADP reductase

20.

For the release of oxygen, it has cross how many membranes of chloroplast

a)

1

b)

2

c)

3

d)

4

21.

Minimum photosynthesis takes place in

a)

Green light

b)

Red light

c)

Blue light

d)

White light

22.

Photosynthesis and respiration have which of the following in common?

a)

In eukaryotes, both processes occur in specialised organelles

b)

ATP synthesis in both processes relies on chemiosmotic mechanism

c)

Both use electron transport

d)

All of the above

23.

Which of the following statements is false?

a)

Usually chloroplasts align themselves along the walls of mesophyll cells, so that they get optimum quantity of incident light

b)

Within chloroplast there is a membranous system consisting of grana, stromal lamellae and stroma

c)

There is division of labour within chloroplast

d)

In grana CO2 is fixed

24.

The most crucial step of the calvin cycle is

a)

Decarboxylation

b)

Carboxylation

c)

Reduction

d)

Regeneration

25.

Reaction centre of PSI is _____________ and Reaction centre of PSII is _____________ –

a)

P680, P700

b)

P700, P680

c)

P800, P600

d)

P700, P900

26.

Kranz type of leaf anatomy is observed in

a)

C3 plants

b)

C4 plants

c)

C3 and C4 plants

d)

Hydrophytic plants

27.

Where is the possible site for cyclic photophosphorylation?

a)

In PSII

b)

In Stroma

c)

In granal thylakoids / lamellae

d)

In stromal lamellae

28.

Where is the possible site for cyclic photophosphorylation?

a)

In PSII

b)

In Stroma

c)

In granal thylakoids / lamellae

d)

In stromal lamellae

29.

Stromal lamellae lack –

a)

PSII

b)

PSI

c)

NADP reductase

d)

a and c

30.

Photophosphorylation in a chloroplast is most similar to which of the following mitochondrial reactions?

a)

Oxidative phosphorylation

b)

Substrate level phosphorylation

c)

Hydrolysis

d)

None

31.

Which statement about photosynthesis is false?

a)

In green plants PSI and PSII are required for the synthesis of NADPH + H+

b)

Photosynthesis is a redox process; H2O is oxidised, CO2 is reduced

c)

Photosynthesis is a physio-chemical process

d)

None

32.

Biosynthetic phase of photosynthesis needs –

a)

ATP, NADPH2, CO2 and H2O

b)

Only CO2

c)

Only ATP + NADPH2

d)

Only O2

33.

Immediately after light becomes unavailable biosynthetic processes –

a)

Stop immediately

b)

Remain continued for ever

c)

Stop and then starts

d)

Continue for some time and then stops

34.

The enzyme ATPase couples the synthesis of ATP to –

a)

The diffusion of protons

b)

The reduction of NADP+

c)

The excitation of Chl.

d)

Carbon dioxide fixation

35.

The enzyme rubisco is found in –

a)

Chloroplast

b)

mitochondria

c)

Cytoplasm

d)

Nucleus

36.

During carbon dioxide fixation / Calvin Cycle, CO2 combines with –

a)

NADPH2

b)

Water

c)

Ribulose biphosphate

d)

3PGAld

37.

The energy to hydrolyse water comes from –

a)

Oxidised chlorophyll

b)

Reduced Chl

c)

The proton gradient

d)

ATP

38.
The plant tissue that carries food materials DOWNWARD from the leaves to the rest of the pant is the ______.
a)
Phloem
b)
Stomata
c)
Chlorophyll
d)
Xylem
39.
Vascular tissue that transports water and minerals UPWARDS from a plant's roots is know as ______.
a)
Chlorophyll
b)
Phloem
c)
Stomata
d)
Xylem
40.
what is the function of root hair?
a)
it is place to store the food
b)
it has large surface area to absorb more water
41.
How do water enter the roots from the soil?
a)
diffusion
b)
osmosis
c)
transpiration
d)
active transport
42.
Water vapour exits a plant leaf by
a)
the stomata
b)
the epidermis
c)
the palisade cells
d)
the spongy mesophyll
43.
Transpiration is
a)
the movement of water through a plant from the roots up the stem
b)
the loss of water from the leaves of a plant by the process of evaporation
c)
the flow of water into plant roots by osmosis from the soil
d)
the process of minerals and sugars moving through plant veins
44.
Why is the evaporation of water from leaves important?
a)
It cools leaves and helps move water up the plant.
b)
It makes the plant wilt
c)
It helps the plant to respire
45.

Where is xylem found in the plant?

a)

leave -> roots -> stem

b)

roots -> stem -> leaves

c)

root hairs -> leaves -> veins

d)

stem -> roots

46.

What do the guard cells do?

a)

Control active transport

b)

Control nutrients moving into the cell

c)

Controls the rate of transpiration (loss of water through the leaf)

47.

What does phloem transport?

a)

Water

b)

Minerals

c)

Fruit

d)

Sugar

48.

What is the main factor that influences the rate of sugar transport?

a)

movement of water

b)

Rate of photosynthesis

c)

capillary action

d)

uprooting plants

49.

Where does sugar transport begin?

a)

Roots

b)

Leaves

c)

Root hairs

d)

Vascular bundles

50.
Xylem vessel elements are strengthened by
a)
lignin
b)
cellulose
c)
melanin
d)
pericycle
51.
How will lowered humidity affect the rate of transpiration?
a)
decrease it
b)
increase it
c)
no change
d)
it depends
52.
An increase in wind or temperature will ________________ transpiration
a)
increase
b)
decrease
c)
no change
d)
none
53.

The rate of translocation in the phloem was observed to decrease steadily after a plant was placed in an environment without oxygen for several minutes. Why did this happen?

a)

The cells in the plants stop respiring.

b)

The xylem no longer takes in water for the plant.

c)

Active transport of mineral salts can no longer occur.

d)

The plant can no longer synthesize sugars to provide energy.

54.
The equation for photosynthesis is
a)
oxygen + water --> glucose + carbon dioxide
b)
oxygen + glucose --> carbon dioxide + water
c)
carbon dioxide + water --> glucose + oxygen
d)
carbon dioxide + glucose --> oxygen + water
55.
Why does temperature have an effect on the rate of photosynthesis?
a)
Higher temperature allows carbon dioxide to diffuse into the leaves faster.
b)
Higher temperature allows water to be transported to the leaves faster.
c)
Higher temperature allows the stomata to open wider.
d)
Higher temperature allows the enzymes to function better.

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