Free Printable Photosynthesis

1.

Which organelle performs photosynthesis?

a)

Chloroplast

b)

Mitochondria

c)

My phone

2.

Leaves look green because.....

a)

they eat their vegetables

b)

to blend into their environment

c)

they contain a molecule named chlorophyll

d)

they are sick

3.

Plants use ______ as food and a building block for growth.

a)

chlorophyll

b)

pigment

c)

glucose (sugar)

d)

Oxygen

4.

Light-dependent (aka Calvin Cycle) reactions take place in the thylakoid membrane of which plant organelle?

a)

thylakoid membrane

b)

stomata

c)

chloroplast

d)

mitochondria

5.

What is one reactant that heterotrophs (like us humans) breathe out that plants use?

a)

a camera and tripod

b)

$CO_2\$ carbon dioxide

c)

roots, flowers, and bees

d)

glucose $C_6H_{12}O_{6_{ }}$

6.

Plants are __________, they make their own food.

a)

Heterotrophs

b)

Autotrophs

c)

Mitochondria

d)

A black hole into an intergalactic void

7.

What is the chemical formula for water?

a)

H₂O

b)

HO₂

c)

CHO₂

d)

CO₂H

8.

What is the chemical formula for glucose?

a)

C₆H₁₂O₆

b)

C₆H₆O₁₂

c)

C₁₂H₆O₁₂

d)

C₆O₂H₆

9.

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.

10.

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

11.

Why would the rate of photosynthesis decrease at super high temperatures?

a)

Enzymes are denatured

b)

Enzymes do not have enough kinetic energy

12.

Select all the products of Photosynthesis.

a)

$H_2O$ (Water)

b)

$CO_2$ (Carbon Dioxide)

c)

$O_2$ (Oxygen)

d)

Sunlight (Light Energy)

e)

$C_6H_{12}O_6$ (Glucose)

13.

I am the powerhouse of the cell and produce ATP!!! What am I?

a)

Ribosomes

b)

Nucleus

c)

Chloroplast

d)

Mitochondria

14.

Based on the picture, what is Q?

a)

Water

b)

Carbon dioxide

c)

Chlorophyll

d)

Sunlight

15.

Why is Photosynthesis important? Select all that apply

a)

Produces glucose as food for plants

b)

Produces oxygen for all organisms

c)

Helps clean my room

d)

Begins all food chains/webs

16.

Diagram shows 4 needs of photosynthesis. What is P?

a)

Carbon dioxide

b)

Water

c)

Chlorophyll

d)

Sunlight

17.

The diagram shows a plant which is placed in a box. The plant is watered every day but died after one week. Why?

a)

The plants did not get enough air

b)

The plant did not get enough water

c)

The plant did not get enough sunlight

18.

Fill in the blanks: The Kreb Cycle is the second stage of Cellular Respiration in which _______ is broken down into _______ in a series of energy-extracting reactions. *clue: take a look at what's being released*

a)

Pyruvic acid ; $O_2$

b)

$C_6H_{12}O_6$

c)

Pyruvic acid ; $H_2O$

d)

Pyruvic acid ; $CO_2$

19.

The correct photosynthesis equation is:

a)

$C_6H_{12}O_6\ +\ 6O_2\ \rightarrow\ 6H_2O\ +\ 6CO_2\ +ATP$

b)

$6H_2O\ +\ 5CO_2\ \rightarrow\ sunlight\ \rightarrow\ 6O_2\ +\ C_6H_{12}O_6\$

c)

$6H_2O\ +\ 6CO_2\ +\ sunlight\ \rightarrow\ 6O_2\ +\ C_6H_{12}O_6$

d)

None of the above

20.

Select ALL the reactants of Photosynthesis. *clue: 3*

a)

$H_2O$ (Water)

b)

$CO_2$ (Carbon Dioxide)

c)

$O_2$ (Oxygen)

d)

Sunlight (Light Energy)

e)

$C_6H_{12}O_6$ (Glucose)

Photosynthesis

Total questions: 20

Worksheet time: 41mins

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