CAM Photosynthesis

Question 1

What is CAM Photosynthesis?

Answer 1

A photosynthetic adaptation in arid climates where stomata open at night to store CO₂ as malic acid

CAM stands for Crassulacean Acid Metabolism, a process used by certain plants to conserve water.

Question 2

When do stomata open in CAM plants?

Answer 2

At night

This adaptation allows CAM plants to minimize water loss during the heat of the day.

Question 3

What is CO₂ stored as during the night in CAM photosynthesis?

Answer 3

Malic acid

Malic acid is a four-carbon compound that stores carbon for later use.

Question 4

What happens to malic acid during the day in CAM plants?

Answer 4

It is broken down to release CO₂

This process allows the plant to photosynthesize while keeping stomata closed to reduce water loss.

Question 5

What is a key advantage of CAM photosynthesis?

Answer 5

It is very water efficient

This is particularly beneficial for plants in arid environments.

Question 6

Give examples of plants that use CAM photosynthesis.

Answer 6

Succulents and cacti

These plants have adapted to survive in dry conditions using CAM photosynthesis.

Question 7

How does the growth rate of CAM plants compare to other plants?

Answer 7

Slower growth

While CAM plants are efficient in water use, their growth rates are generally slower due to the energy demands of the CAM process.