Question 1
In plants, oxygen can be thought of as a waste product of photosynthesis.
Where does the oxygen come from?
The photolysis of water.
Molecular oxygen in the atmosphere.
The splitting of carbon dioxide.
The breakdown of glucose.
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DP IB Biology: HL
Topic Questions
2.8 Photosynthesis
Question 2
Which of the following statements best describes why the majority of plants appear green?
Chlorophyll reflects the light most strongly in the green portion of the visible spectrum.
Chlorophyll absorbs light most strongly in the green portion of the visible spectrum, followed by the red portion.
When chlorophyll absorbs light, it releases electrons.
The human eye is more sensitive to green light.
Question 3
Which option correctly completes the sentence below?
Photosynthesis is an example of _________.
An exothermic reaction.
A catabolic reaction.
An endothermic reaction.
Net energy loss.
Question 4
A plant is grown in increasing concentrations of carbon dioxide, whilst other factors are kept constant.
What will happen to the rate of photosynthesis?
There will be no change.
It will increase to a maximum level.
It will keep increasing exponentially.
It will increase to an optimal level and then decrease.
Question 5
With reference to the experimental set-up shown, which option correctly describes how the rate of photosynthesis can be directly measured?
Measuring the distance between the light and plant.
Measuring the change in biomass of the plant.
Measuring the carbon dioxide production by counting bubbles.
Measuring the oxygen production by counting bubbles.
