Sample Questions

What is the main source of energy for photosynthesis?

• Water

• Sunlight

• Soil

• Air

Which part of the plant absorbs sunlight for photosynthesis?

• Roots

• Leaves

• Stems

• Flowers

What gas is taken in by plants during photosynthesis?

• Oxygen

• Nitrogen

• CO2

• Hydrogen

What gas is released by plants during photosynthesis?

• Oxygen

• Nitrogen

• CO2

• Hydrogen

What pigment gives plants their green color and is involved in photosynthesis?

• Chlorophyll

• Anthocyanin

• Carotene

• Xanthophyll

What is the primary purpose of photosynthesis in plants?

• Producing water

• Producing food

• Producing oxygen

• Producing CO2

During photosynthesis, plants convert ________ and ________ into glucose and oxygen.

• Water, carbon dioxide

• Carbon dioxide, oxygen

• Oxygen, carbon dioxide

• Nitrogen, oxygen

Which of the following is NOT a product of photosynthesis?

• Glucose

• Oxygen

• CO2

• Water

Where does photosynthesis mainly occur in plants?

• Roots

• Flowers

• Leaves

• Stems

What is the ultimate source of energy for all living organisms on Earth?

• Soil

• Water

• Sunlight

• Air