Required Practical: Photosynthesis Rate (OCR GCSE Biology A, Combined (Gateway Science Suite)): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is measured to determine the rate of photosynthesis in this practical?
What is measured to determine the rate of photosynthesis in this practical?
Amount of oxygen produced
Why is sodium hydrogen carbonate added to the water?
Why is sodium hydrogen carbonate added to the water?
To provide a source of carbon dioxide
Which aquatic plant is given as an example for this practical?
Which aquatic plant is given as an example for this practical?
Elodea
How is light intensity varied in this experiment?
How is light intensity varied in this experiment?
Moving the lamp closer or further away
What measurement indicates the volume of oxygen produced?
What measurement indicates the volume of oxygen produced?
Distance the oxygen bubble travels
What is the example time period given for measuring oxygen production?
What is the example time period given for measuring oxygen production?
5 minutes
What piece of apparatus is used to move the oxygen bubble to a measurable point?
What piece of apparatus is used to move the oxygen bubble to a measurable point?
Syringe
Where should the cut end of the pondweed be positioned in the test tube?
Where should the cut end of the pondweed be positioned in the test tube?
At the top
What happens to photosynthesis rate as light intensity increases?
What happens to photosynthesis rate as light intensity increases?
Increases then levels off
Why does the photosynthesis rate decrease at very high temperatures?
Why does the photosynthesis rate decrease at very high temperatures?
Enzymes denature
Which factors must be kept constant when testing the effect of light intensity?
Which factors must be kept constant when testing the effect of light intensity?
Temperature and CO₂ concentration
Where is understanding these factors particularly useful for optimizing plant growth?
Where is understanding these factors particularly useful for optimizing plant growth?
Greenhouses