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DP IB Biology: SL

Topic Questions

Home / IB / Biology: SL / DP / Topic Questions / 2. Molecular Biology / 2.8 Photosynthesis / Multiple Choice: Paper 1


2.8 Photosynthesis

Question 1

Marks: 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.

Choose your answer
  
Key Concepts
Photolysis of Water

Question 2

Marks: 1

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.

Choose your answer
  

Question 3

Marks: 1

Which option correctly completes the sentence below?

Photosynthesis is an example of  _________.

  • An exothermic reaction.

  • A catabolic reaction.

  • An endothermic reaction.

  • Net energy loss.

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Key Concepts
Energy Requirements

Question 4

Marks: 1

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.

Choose your answer
  

Question 5

Marks: 1

With reference to the experimental set-up shown, which option correctly describes how the rate of photosynthesis can be directly measured?

e-5

  • 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.

Choose your answer