Photosynthesis and Photorespiration Quiz

What is the primary role of the Calvin Cycle in photosynthesis?

• To absorb water

• To release oxygen

• To fix carbon dioxide into organic molecules

• To capture sunlight

Why is RuBisCO considered a flexible enzyme in C3 plants?

• It can bind with both carbon dioxide and oxygen

• It can only bind with oxygen

• It can only bind with carbon dioxide

• It does not bind with any gases

What is a major disadvantage of photorespiration in C3 plants?

• It enhances plant growth

• It produces less product and wastes energy

• It is highly energy-efficient

• It increases sugar production

How do C4 plants avoid photorespiration?

• By closing their stomata during the day

• By separating carbon fixation and the Calvin Cycle into different cells

• By using RuBisCO exclusively

• By performing photosynthesis only at night

What is a unique feature of CAM plants?

• They do not perform photosynthesis

• They have large vascular bundles

• They store water in aquiferous parenchyma

• They perform photosynthesis only during the day

What is the significance of 'kranz' anatomy in C4 plants?

• It reduces the need for sunlight

• It increases the size of the leaves

• It enables separation of carbon fixation and the Calvin Cycle

• It allows for efficient water storage

Why is it challenging to grow C3, C4, and CAM plants together?

• They require different soil types

• They have different ideal conditions for photosynthesis

• They all thrive in cold climates

• They all need the same amount of water

What happens to photosynthesis at low temperatures?

• It stops completely

• It speeds up due to increased enzyme activity

• It slows down due to reduced enzyme activity

• It remains unaffected

How can adding CO2 to a greenhouse be beneficial?

• It decreases the rate of photosynthesis

• It boosts photosynthesis only if temperatures are ideal

• It has no effect on photosynthesis

• It always increases photosynthesis regardless of conditions

What is the most sensitive enzyme to high temperatures in photosynthesis?

• NADP Glyceraldehyde Phosphate Reductase

• ATP synthase

• PEP carboxylase

• RuBisCO