Test Your Knowledge On Lipids!

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| By Blakealexisdyer
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Blakealexisdyer
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Quizzes Created: 1 | Total Attempts: 406
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  • 1/5 Questions

    The primary function of fats is...

    • To provide structure within specialized cells
    • To secrete fatty acids into the body at a moderate rate
    • To store energy
    • To act as risk factors for diseases, such as cardiovascular diease
    • Act as a hydrophobic element in the body to ward off excess water
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Test Your Knowledge On Lipids! - Quiz
About This Quiz

Explore the intriguing world of lipids with our quiz! Delve into the structure and functions of various lipids, including phospholipids and steroids. Understand how modifications like hydrogenation affect lipid properties. Ideal for students enhancing their biochemistry knowledge.

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  • 2. 

    A phospholipid is a type of lipid which makes up cell membranes. Which of the following does not characterize a phospholipid?

    • A phosphate functional group

    • A hydrophilic head and hydrophobic tails

    • The ability to form a bilayer

    • A hydrophobic head and hydrophilic tails

    • An ester bond between glycerol and fatty acids

    Correct Answer
    A. A hydrophobic head and hydrophilic tails
    Explanation
    A phospholipid is composed of a hydrophilic (water-loving) head and hydrophobic (water-hating) tails. This arrangement allows phospholipids to form a bilayer, which is a characteristic feature of cell membranes. Additionally, a phospholipid contains a phosphate functional group and an ester bond between glycerol and fatty acids. However, a phospholipid does not have a hydrophobic head and hydrophilic tails, as it is the opposite - hydrophilic head and hydrophobic tails.

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  • 3. 

    The label on a container of margarine lists 'hydrogenated vegetable oil' as the major ingredient. What is the result of adding hydrogens to vegetable oil?

    • The hydrogenated vegetable oil has a lower melting point.

    • The hydrogenated vegetable oil stays solid at room temperature.

    • The hydrogenated vegetable oil has more "kinks" in the fatty acid chains.

    • The hydrogenated vegetable oil has fewer trans fatty acids.

    • The hydrogenated vegetable oil is less likely to clog arteries.

    Correct Answer
    A. The hydrogenated vegetable oil stays solid at room temperature.
    Explanation
    By adding hydrogen to the unsaturated vegetable oil, the result is a saturated fatty acid. The vegetable oil is now 'saturated' with hydrogen. This causes the oil to solidify at room temperature and therefore, produce margarine.

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  • 4. 

    Large organic molecules are usually assembled by polymerization of a few kinds of simple subunits. Which of the following is an exception to this statement?

    • A steroid

    • Cellulose

    • DNA

    • An enzyme

    • A contractile protein

    Correct Answer
    A. A steroid
    Explanation
    Steroids are an exception to the statement because they are not assembled by polymerization of simple subunits. Steroids are a class of organic compounds that have a specific structure and are derived from cholesterol. They are composed of four interconnected carbon rings and have various functional groups attached to them. Unlike polymers, which are made up of repeating subunits, steroids have a unique and complex structure that is not formed through polymerization. Therefore, a steroid is an exception to the statement that large organic molecules are usually assembled by polymerization of simple subunits.

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  • 5. 

    Steroids are specialized lipids composed of four fused carbon rings. Based on this knowledge, what would you expect to be the chemical formula of a steroid?

    • CO2

    • C96H150O9

    • C4H12

    • C27H46O

    • NH3

    Correct Answer
    A. C27H46O
    Explanation
    The formula C27 H46 O is the formula for cholesterol, a specialized steroid in animals.

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Quiz Review Timeline (Updated): Mar 21, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 24, 2013
    Quiz Created by
    Blakealexisdyer
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