Carbon: The Central Atom Characteristics
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Questions and Answers

Which of the following statements about lipids is NOT true?

  • All lipids are polymers that can be broken down into smaller subunits. (correct)
  • Steroids are classified as a type of lipid.
  • Phospholipids are a primary component of cell membranes.
  • Lipids are composed of carbon, hydrogen, and oxygen.
  • What is the primary function of true (neutral) fats in the human body?

  • To provide cushioning for organs.
  • To serve as energy storage molecules. (correct)
  • To act as hormones for cellular signaling.
  • To form the structural basis of cell membranes.
  • Which of the following statements about the structure of true (neutral) fats is correct?

  • They are polymers made up of repeating units of glycerol and fatty acids.
  • They are formed by the hydrolysis of glycerol and fatty acids.
  • They are composed of a single glycerol molecule and one fatty acid.
  • They are formed by dehydration synthesis between glycerol and fatty acids. (correct)
  • What is the main difference between saturated and unsaturated fats?

    <p>Saturated fats have as much hydrogen as possible, while unsaturated fats have fewer hydrogen atoms.</p> Signup and view all the answers

    What is the primary structural difference between triglycerides, diglycerides, and monoglycerides?

    <p>The number of fatty acid chains they contain.</p> Signup and view all the answers

    Which of the following is NOT a common function of fat deposits around organs like the eyes, kidneys, and heart?

    <p>Facilitating the transport of fat-soluble vitamins.</p> Signup and view all the answers

    What is the primary factor that determines the polarity of a lipid molecule?

    <p>The presence and amount of oxygen atoms in the molecule.</p> Signup and view all the answers

    Which of the following statements about the energy content of lipids and carbohydrates is correct?

    <p>Lipids have twice the energy content of carbohydrates per gram.</p> Signup and view all the answers

    Which of the following molecules is NOT a component of a true (neutral) fat?

    <p>Phosphate groups</p> Signup and view all the answers

    Which of the following statements about the physical properties of lipids is correct?

    <p>Saturated fats are solids at room temperature, while unsaturated fats are liquids.</p> Signup and view all the answers

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