Photosynthesis

What is the balanced chemical equation for photosynthesis?

• 6CO2 + 6H2O → C6H12O6 + 6O2

• C6H12O6 + 6O2 → 6CO2 + 6H2O

• 6CO2 + 6O2 → C6H12O6 + 6H2O

• C6H12O6 + 6H2O → 6CO2 + 6O2

Why is photosynthesis considered important for life on Earth?

• It produces carbon dioxide, which is essential for plant growth.

• It is the process by which plants create water.

• It generates oxygen and organic compounds that are vital for most life forms.

• It helps to cool down the Earth's atmosphere.

In the cross section of a leaf, which layer contains the majority of chloroplasts?

• Cuticle

• Palisade mesophyll

• Spongy mesophyll

• Epidermis

What is the primary pigment found in chloroplasts that absorbs sunlight for photosynthesis?

• Carotene

• Xanthophyll

• Chlorophyll

• Anthocyanin

Which of the following is NOT a factor that affects the rate of photosynthesis?

• Light intensity

• Carbon dioxide concentration

• Soil pH

• Temperature

What is the role of chlorophyll in photosynthesis?

• It helps in the absorption of water.

• It captures light energy and converts it into chemical energy.

• It transports glucose to different parts of the plant.

• It releases oxygen into the atmosphere.

Which part of the leaf is responsible for gas exchange?

• Stomata

• Xylem

• Phloem

• Cuticle

What is the function of the chloroplasts in plant cells?

• They are the site of cellular respiration.

• They store starch.

• They are the site of photosynthesis.

• They protect the cell from pathogens.

How does an increase in light intensity affect the rate of photosynthesis, up to a certain point?

• It decreases the rate of photosynthesis.

• It has no effect on the rate of photosynthesis.

• It increases the rate of photosynthesis.

• It first increases and then decreases the rate of photosynthesis.

What happens to the oxygen produced during photosynthesis?

• It is used by the plant for cellular respiration.

• It is stored in the plant for later use.

• It is released into the atmosphere.

• It is used to break down glucose in the plant cells.