Lipids Bio Molecule Quiz Questions

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Quizzes Created: 14 | Total Attempts: 33,200
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  • 1/5 Questions

    Lipids are ______ in water.

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About This Quiz

HUMAN BIOLOGY AS
A quiz on fats and oils (lipids).

Lipids Bio Molecule Quiz Questions - Quiz

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  • 2. 

    Fats and oils are also known as _______?

    • Polypeptides

    • Polymers

    • Tripeptides

    • Triglycerides

    • Trisaccharides

    Correct Answer
    A. Triglycerides
    Explanation
    Fats and oils are composed of molecules called triglycerides. Triglycerides are a type of lipid, which are organic compounds that are insoluble in water. They are made up of three fatty acid molecules attached to a glycerol molecule. Fats and oils serve as a concentrated source of energy in the body and also play important roles in insulation, protection of organs, and absorption of fat-soluble vitamins.

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  • 3. 

    Saturated fatty acids tend to have _____ melting points than unsaturated fatty acids.

    • Higher

    • Lower

    Correct Answer
    A. Higher
    Explanation
    Saturated fatty acids have higher melting points than unsaturated fatty acids because they have straight chains and can pack tightly together. This strong packing leads to stronger intermolecular forces, making it more difficult for the molecules to break apart and melt. In contrast, unsaturated fatty acids have kinks in their chains due to double bonds, which disrupt the packing and weaken the intermolecular forces, resulting in lower melting points.

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  • 4. 

    Cholesterol is a kind of ______.

    Correct Answer
    steroid
    Explanation
    Cholesterol is classified as a steroid. Steroids are a type of organic compound that have a specific structure known as a steroid nucleus. Cholesterol fits this structure, as it contains the characteristic four fused rings of carbon atoms. Steroids are important in the body as they serve as precursors for various hormones and are involved in several physiological processes. Cholesterol, specifically, plays a crucial role in the formation of cell membranes and the production of certain hormones, such as estrogen and testosterone.

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  • 5. 

    _____ fatty acids join on to a glycerol molecule by a __________ reaction. The bonds formed are called _____ bonds.

    Correct Answer
    three condensation ester
    3 condensation ester
    Explanation
    Three fatty acids join on to a glycerol molecule by a condensation reaction. The bonds formed are called ester bonds.

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  • Current Version
  • May 22, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 28, 2011
    Quiz Created by
    Nuzzzzie
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