Limiting Factors in Photosynthesis Flashcards

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What is a limiting factor in photosynthesis?

A limiting factor is a thing that slows down photosynthesis because it is in short supply.

Name three main environmental limiting factors for photosynthesis.

Light intensity, carbon dioxide concentration, and temperature.

How does low light intensity affect the rate of photosynthesis?

Low light intensity makes photosynthesis slow because there is less energy for the reaction.

How does low carbon dioxide concentration affect photosynthesis?

If there is little carbon dioxide, the plant cannot make glucose quickly, so the rate of photosynthesis is low.

Why does a low temperature slow down photosynthesis?

At low temperatures, the enzymes that control photosynthesis work more slowly, so the rate drops.

Why can a very high temperature limit the rate of photosynthesis?

If the temperature is too high, the enzymes can denature, so photosynthesis slows down or stops.

How can the amount of chlorophyll in leaves act as a limiting factor?

Leaves with less chlorophyll, such as yellow leaves, absorb less light, so photosynthesis is slower.

In a dark, shady place, which factor is most likely to be limiting photosynthesis?

Light intensity is most likely to be the limiting factor in a dark, shady place.

Why does the rate of photosynthesis stop increasing even if you keep raising light or carbon dioxide?

It stops increasing because another factor, such as temperature, has become the new limiting factor.

How can farmers use limiting factors to increase the rate of photosynthesis in greenhouses?

They can add extra light, raise carbon dioxide levels, and control the temperature to reduce limiting factors.

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