WAEC Biology 2016 Objective — Question 21

21. The steps below are involved in the testing of a leaf for starch. Study them carefully and answer questions 21 and 22. I. Decolorize leaf II. Dip decolorized leaf in warm water III. Place leaf in boiling water IV. Add iodine solution. The correct order for the test is A. I, II, II and IV B. I, II, II and IV C. II, III, I and IV D. III, I, II and IV

• A. I, II, II and IV
• B. I, II, II and IV
• C. II, III, I and IV
• D. III, I, II and IVCorrect