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Question 29

A revision card on limiting factors of photosynthesis defines a limiting factor as the factor that is harming the plant. Which definition should replace that one?

  1. It is whichever factor is present in the largest amount at the time
  2. It is the requirement in shortest supply, holding the rate backCorrect answer
  3. It is any factor the plant could manage perfectly well without
  4. It is the factor that has already been raised to its maximum

Explanation

At any moment the reaction can go no faster than its scarcest requirement allows, so that requirement sets the ceiling and supplying more of anything else changes nothing. Being limiting has nothing to do with harm, and it is not the factor in greatest supply either, since a plentiful requirement is precisely the one that is not holding anything back.

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Question 29: A revision card on limiting factors of photosynthesis… · Plants and Photosynthesis · Questena