Unit 3 Test: Macromolecules

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Unit 3 Test: Macromolecules - Quiz
About This Quiz

This quiz, titled 'Unit 3 Test: Macromolecules,' assesses understanding of biological macromolecules. It features questions that require selecting the correct answer from multiple options, focusing on key concepts in biochemistry relevant to educational curricula.

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    • Nucleic Acid

    • Protein

    • Carbohydrate

    • Lipid

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    A. Nucleic Acid
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    Lugol's Iodine is placed on the cut side of a potato.  What is likely to happen?

    • The potato will turn black

    • The potato will turn orange

    • The potato will turn light purple

    • There will be no color change

    Correct Answer
    A. The potato will turn black
    Explanation
    When Lugol's Iodine is placed on the cut side of a potato, the potato will turn black. This is because Lugol's Iodine reacts with the starch present in the potato, forming a dark-colored complex known as iodine-starch complex. This reaction is commonly used as a test for the presence of starch. Therefore, the black color change indicates the presence of starch in the potato.

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  • Mar 21, 2023
    Quiz Edited by
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  • Sep 22, 2013
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