B1.4.3 - Factors Affecting Photosynthesis Flashcards Preview

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Flashcards in B1.4.3 - Factors Affecting Photosynthesis Deck (17):
1

What are the limiting factors that affect the rate of photosynthesis?

Light intensity
Carbon dioxide
Temperature

2

What are limiting factors?

Factors that can limit something down

3

How can you measure the rate of photosynthesis?

By measuring how much glucose and food a plant makes in a given time, or how much biomass the plant has increased in

4

What is glucose also used for in plants?

Creating new cells

5

Why does checking the increase in biomass calculate the rate of photosynthesis?

Because the glucose produced creates new cells, which increases the biomass of the plant

6

What is the equation in order to find the rate of something?

1 / t = 1/t sec to the power of -1

7

What does the t in the rate of photosynthesis equation represent?

Time

8

If the light intensity is high, will the rate of photosynthesis be high or low?

It will be high

9

What happens if the light intensity is higher than the plant’s maximum reaction rate?

The plant will continue to photosynthesise at its maximum rate of reaction

10

If the carbon dioxide concentration is low in photosynthesis, will the rate of the reaction be high or low?

High

11

How much carbon dioxide does the atmosphere contain as a percentage?

0.04%

12

What does carbon dioxide’s scarcity suggest about photosynthesis?

It means that usually carbon dioxide is the most common limiting factor

13

Why do farmers artificially increase the amount of carbon dioxide in greenhouses?

So the plants can take in a higher carbon dioxide concentration and photosynthesise more

14

If the temperature is high, will photosynthesis be slower or quicker?

Quicker

15

What happens if the temperature is too high?

The rate of reaction slows down drastically

16

Is photosynthesis an enzyme controlled reaction?

Yes

17

Why does the rate of reaction of photosynthesis drastically decrease when the temperature becomes too high?

The enzymes controlling the reaction will become denatured and be unable to continue the reaction