Post-UTME Biology 2016 Objective — Question 1
Question 1 of 20 from the Post-UTME Screening (Post-UTME) Biology 2016 Objective paper, with the correct answer and a full explanation.
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Investigation of respiration in green plants is carried out in the dark because
- A. respiration occurs in plants only in the dark
- B. light is destructive to potted plants
- C. respiration is faster than photosynthesis in the presence of light
- D. carbon dioxide released in the presence of light is used up in photosynthesisCorrect
Explanation
In the light, plants photosynthesise, consuming the CO2 released by respiration, which would mask/interfere with measuring respiration alone. Working in the dark removes photosynthesis from the picture.
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