WAEC Biology 2009 Objective — Question 27
Question 27 of 60 from the West African Examinations Council (WAEC) Biology 2009 Objective paper, with the correct answer and a full explanation.
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In testing for starch in a leaf, the leaf is first boiled in water for about a minute so that the
- A. A. cells are killedCorrect
- B. B. chlorophyll is dissolved out
- C. C. cells are softened
- D. D. iodine will penetrate
Explanation
In testing for starch in a leaf, the leaf is first boiled in water for about a minute so that the cells are killed (this stops enzyme activity and helps in subsequent steps of the test).
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