Biology Topic Practice

Chlorophyll as a Limiting Factor

Chlorophyll is the pigment that absorbs light energy; without it, photosynthesis cannot happen.

What can cause a plant to have less chlorophyll?

What is Chlorophyll as a Limiting Factor?

"Chlorophyll is the green pigment in chloroplasts that is essential for capturing energy for photosynthesis."

Question 1

What is the function of chlorophyll in photosynthesis?

Question 2

Select what is the function of chlorophyll in photosynthesis?

Question 3

A variegated leaf has areas with less chlorophyll. What would happen in those pale areas?

The Role of Chlorophyll

Less chlorophyll means less light can be absorbed.

Causes include magnesium deficiency (chlorosis) or tobacco mosaic virus.

Variegated leaves (white and green) have less overall photosynthesis.

Exam Tip

Chlorophyll is an internal factor, unlike light or CO2 which are environmental factors.

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