Factors Affecting the Rate of Photosynthesis Flashcards

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What are the four main factors that affect the rate of photosynthesis?

The amount of chlorophyll, temperature, light intensity, and carbon dioxide concentration.

How does the amount of chlorophyll affect photosynthesis?

Chlorophyll absorbs light energy needed for photosynthesis. Plants with less chlorophyll will photosynthesise less. Plants in darker areas produce more chlorophyll to absorb more light.

How does temperature affect the rate of photosynthesis?

Increasing temperature increases the rate of photosynthesis by increasing the kinetic energy of particles, leading to more successful collisions between enzymes and substrates. However, at very high temperatures, enzymes denature and the rate decreases.

How does light intensity affect the rate of photosynthesis?

Increasing light intensity increases the rate of photosynthesis, but only up to a certain point where another factor becomes limiting.

How does carbon dioxide concentration affect the rate of photosynthesis?

Increasing carbon dioxide concentration increases the rate of photosynthesis until another factor becomes limiting.

What happens to the rate of photosynthesis when enzymes denature at high temperatures?

The rate of photosynthesis decreases because the enzyme’s active site changes shape and is no longer complementary to the substrate.

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