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WAEC Biology 2011 Question 30

Question 30

Photosynthesis and Plant Nutrition

The conversion of glucose to starch in the leaf during the day principally

  1. A.enables photosynthesis.
  2. B.prevents osmotic problems.
  3. C.enables the leaf to store the starch.
  4. D.enables glucose to be used up.
Show the answer and explanation

Answer: B (prevents osmotic problems.)

Explanation

Glucose is soluble and would draw water into the cells; starch is insoluble, so storing it as starch avoids osmotic problems.