Section: Listening Part B

40)

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Select the best answer to the question provided in the audio.

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1. Small amounts of amino acids
2. High concentration of starch
3. Large amounts of fat
4. Low density protein

The answer to this question is implied. You must draw logical inference to answer the question correctly. By reading the statement "The color of iodine changed from orange to dark blue in the liquid taken from the grated potato... " lines 16-17, we can infer that this chemical reaction happens because of the high concentration of starch.