Photosynthesis

• Biology
• Lower Secondary (Key Stage 3)

Photosynthesis 

Give the word equation for photosynthesis.

+

+

carbon dioxide

water

glucose

oxygen

sunlight

Put the photosynthesis equation in the correct order

Water

Carbon dioxide

Glucose

Oxygen

Complete the word and chemical equations for photosynthesis.

Word equation:

+

+

→

Chemical equation:

+

→

+

Water

Carbon dioxide

Glucose

Oxygen

+

+

What is the equation for photosynthesis?

Glucose

Oxygen

Carbon dioxide

water

One reason why plants in the rain-forest has ______________ leaves is because they need to trap alot of  _________. If they don't trap light means that photosynthesis will be  ________ . Large leaves and enough trapped light means that the plant can  _______________ successfully.

photosynthesise

slow

large

light

Structure

Function

Controls what enters and leaves the cell.

Contains DNA and controls the cell processes.

The site of respiration.

The site of chemical reactions in the cell.

Storing cell sap and keeping the cell rigid.

The site of photosynthesis. Contains chlorophyll.

Protects and supports the cell.

Cell membrane

Chloroplast

Cell wall

Vacuole

Mitochondria

Nucleus

Cytoplasm

In which layer does most photosynthesis happen?

1. Waxy cuticle
2. Palisade layer
3. Spongy layer
4. Lower epidermis

Where in a leaf does photosynthesis happen?

1. Chloroplast
2. Stomata
3. Cuticle
4. Surface area

What is the primary pigment used in photosynthesis?

1. Xanthophyll
2. Carotene
3. Chlorophyll
4. Melanin

Where does photosynthesis primarily occur in a plant cell?

1. Endoplasmic reticulum
2. Nucleus
3. Mitochondria
4. Chloroplasts

3. What is the primary source of carbon for photosynthesis?

1. Carbon dioxide
2. Nitrogen dioxide
3. Oxygen
4. Methane

What are the two main products of photosynthesis?

1. Fructose and Hydrogen
2. Glucose and Oxygen
3. Starch and Nitrogen
4. Water and Carbon dioxide

Do you need to reference a photograph that you use in an assignment?

1. Yes
2. No

In which stage of photosynthesis is light energy converted into chemical energy?

1. Carbon fixation
2. Photorespiration
3. Light-dependent reactions
4. Calvin cycle

Which gas is produced during photosynthesis?

1. Methane
2. Nitrogen
3. Carbon dioxide
4. Oxygen

Which gas do plants need for photosynthesis?

1. Oxygen
2. Carbon dioxide

What gas is essential for the process of photosynthesis?

1. Carbon dioxide
2. Methane
3. Nitrogen
4. Oxygen

Which cell part does photosynthesis?

1. Mitochondria
2. Nucleus
3. Chloroplast
4. Endoplasmic reticulum

What is the process by which plants make their own food called?

1. photoshopping
2. photosynthesis
3. photography
4. photocopying

Where does photosynthesis take place?

1. Cytoplasm
2. Vacuole
3. Chloroplast
4. Mitochondria

How does carbon dioxide reach the palisade cells in the leaves for photosynthesis?

1. Transported directly from the roots
2. Through diffusion from the air outside the leaf
3. Through active transport from the soil
4. By absorption through the stem

After photosynthesis, how is glucose transported to different areas of the plant?

1. Through the stomata
2. By diffusion through the air
3. Via the xylem
4. Via the phloem

Which organelle is responsible for photosynthesis in plant cells?

1. Golgi apparatus
2. Nucleus
3. Mitochondria
4. Chloroplasts

What is the main role of photosynthesis?

1. Convert chemical energy into sunlight
2. Convert heat energy into chemical energy
3. Convert sunlight into chemical energy
4. Convert sunlight into heat energy

What is the waste product of photosynthesis?

1. Oxygen
2. Glucose
3. Water
4. Carbon dioxide

What are the reactants of photosynthesis?

1. Sunlight and chlorophyll
2. Nitrogen and hydrogen
3. Carbon dioxide and water
4. Oxygen and glucose

Where does photosynthesis occur in plant cells?

1. Vacuole
2. Ribosome
3. Chloroplast
4. Cell wall

Where does photosynthesis happen in plants?

1. Chloroplasts
2. Nucleus
3. Vacuoles
4. Mitochondria

What is the stem's role in photosynthesis?

1. Keeping leaves in the light
2. Producing oxygen

What is the main site of photosynthesis in a leaf?

1. Spongy layer
2. Vein cells
3. Waxy layer
4. Palisade layer

How can the rate of photosynthesis of an aquatic plant be measured?

1. By counting bubbles of gas given off.
2. By measuring the water temperature.

What gas is collected when measuring the rate of photosynthesis of an aquatic plant?

1. Oxygen, which can relight a glowing splint.
2. Carbon dioxide, which extinguishes a glowing splint.

How does light intensity affect the rate of photosynthesis?

1. Decreases the rate of photosynthesis
2. Stops photosynthesis
3. Increases the rate of photosynthesis
4. Has no effect on photosynthesis

What happens if the temperature is too low for photosynthesis?

1. Stops photosynthesis
2. Has no effect on photosynthesis
3. Photosynthesis will speed up
4. Photosynthesis will be slower

What impact does an increase in temperature have on photosynthesis?

1. Speeds up photosynthesis
2. Photosynthesis will stop
3. Has no effect on photosynthesis
4. Slows down photosynthesis

What is the relationship between light intensity and photosynthesis?

1. No relationship
2. Inversely proportional
3. Directly proportional
4. Randomly fluctuating

What is the effect of the optimum temperature on photosynthesis?

1. Stops photosynthesis
2. Maximizes photosynthesis rate
3. Has no effect on photosynthesis
4. Minimizes photosynthesis rate

What is the primary pigment involved in photosynthesis?

1. Carotene
2. Phycobilin
3. Chlorophyll
4. Xanthophyll

Where does photosynthesis primarily occur in plants?

1. Nucleus
2. Chloroplasts
3. Mitochondria
4. Cell Membrane

What gas is utilized in the process of photosynthesis?

1. Methane
2. Carbon Dioxide
3. Nitrogen
4. Oxygen

What type of reaction is photosynthesis considered to be?

1. Endergonic
2. Exothermic
3. Thermodynamic
4. Endothermic

What is the primary pigment involved in photosynthesis?

1. Carotene
2. Phycobilin
3. Chlorophyll
4. Xanthophyll

Where does photosynthesis primarily occur in a plant cell?

1. Mitochondria
2. Endoplasmic reticulum
3. Nucleus
4. Chloroplasts

What are the reactants of the light-dependent reactions in photosynthesis?

1. Chlorophyll and ATP
2. Water and sunlight
3. Carbon dioxide and water
4. Glucose and oxygen