Photosynthesis Concepts and Processes

What is the process called where plants make their own food using sunlight?

• Cellular Respiration

• Photosynthesis

• Transpiration

• Germination

What two important substances do plants produce during photosynthesis?

• Carbon dioxide and water

• Glucose and oxygen

• ATP and NADPH

• Nitrogen and hydrogen

How do animals obtain glucose for their energy needs?

• They make it themselves through photosynthesis.

• They absorb it directly from sunlight.

• They consume food that contains glucose.

• They produce it from water and oxygen.

What are the necessary inputs for plants to perform photosynthesis?

• Glucose and oxygen

• ATP and NADPH

• Carbon dioxide and water

• Light and nitrogen

What is the main pigment in plants responsible for absorbing light energy during photosynthesis?

• Carotene

• Anthocyanin

• Xanthophyll

• Chlorophyll

Why do most plants appear green to our eyes?

• They absorb all colors of light.

• Chlorophyll reflects green light.

• They produce green pigments as waste.

• Green light is the only light they can use.

In which part of a plant cell does photosynthesis primarily occur?

• Nucleus

• Mitochondria

• Chloroplast

• Vacuole

During the light-dependent reactions of photosynthesis, what molecule is split to release oxygen?

• Carbon dioxide

• Glucose

• Water

• ATP

What gas enters a plant through small pores called stomata to be used in the Calvin Cycle?

• Oxygen

• Nitrogen

• Carbon dioxide

• Hydrogen

How do cacti adapt to hot, dry environments to conserve water during photosynthesis?

• They have very large leaves to capture more sunlight.

• They open their stomata only at night to store carbon dioxide.

• They absorb water directly from the air through their stems.

• They perform photosynthesis without needing carbon dioxide.