Cards (36)

  • Triglycerides are the primary energy storage molecules in the body, providing more than twice the energy per gram compared to carbohydrates or proteins
  • What is the role of steroid hormones in the body?
    Chemical messengers
  • What are the three main classes of lipids?
    Triglycerides, phospholipids, steroids
  • Triglycerides are the primary energy storage lipids, while phospholipids are the structural components of cell membranes
  • Triglycerides are joined by ester bonds.
    True
  • What structure do phospholipids form in cell membranes?
    Phospholipid bilayers
  • Phospholipids are amphipathic, meaning they have both polar and nonpolar regions.
    True
  • Lipids are hydrophobic organic compounds that are insoluble in water but soluble in organic solvents
  • Triglycerides are the primary energy storage molecules, phospholipids are essential for cell membrane structure
  • Arrange the steps in the formation of a phospholipid bilayer in cell membranes:
    1️⃣ Hydrophobic tails face inward
    2️⃣ Polar heads face outward
    3️⃣ Hydrophobic barrier is created
    4️⃣ Substance passage is regulated
  • Steroids are hydrophobic and insoluble in water due to their nonpolar nature.

    True
  • Triglycerides provide more than twice the energy per gram compared to carbohydrates or proteins
  • Phospholipids are the primary structural components of cell membranes.
    True
  • Phospholipids are amphipathic, meaning they have both polar and nonpolar regions.

    True
  • Lipids are insoluble in water but soluble in organic solvents
  • Match the lipid class with its composition and function:
    Triglycerides ↔️ Glycerol + 3 fatty acids, energy storage
    Phospholipids ↔️ Glycerol + 2 fatty acids + phosphate group, structural
    Steroids ↔️ 4-ring structure, signaling
  • Triglycerides are formed by joining fatty acids to glycerol through ester bonds
  • In cell membranes, phospholipids form a bilayer with hydrophobic tails facing inward
  • What does it mean for lipids to be hydrophobic?
    Insoluble in water
  • Phospholipids are the main structural components of cell membranes.

    True
  • Waxes and fats provide insulation and protection for organisms, helping to maintain body temperature
  • Phospholipids contain three fatty acids.
    False
  • What are the building blocks of triglycerides?
    Glycerol and 3 fatty acids
  • Phospholipids are amphipathic, meaning they have both polar and nonpolar regions
  • Phospholipids are composed of a glycerol molecule, a phosphate group, and two fatty acids
  • Phospholipid bilayers in cell membranes have hydrophobic tails facing inward and polar heads facing outward.
    True
  • Match the lipid function with its description:
    Energy storage ↔️ Triglycerides provide energy
    Structural components ↔️ Phospholipids form cell membranes
    Signaling molecules ↔️ Steroid hormones regulate processes
    Insulation and protection ↔️ Waxes and fats maintain body temperature
  • Triglycerides consist of a glycerol molecule with three fatty acids joined by ester bonds.
    True
  • Steroids are lipids with a characteristic 4-ring structure
  • Phospholipids in cell membranes form a hydrophobic barrier that regulates the passage of substances.
    True
  • Lipids provide more energy per gram compared to carbohydrates or proteins
  • Triglycerides are the primary energy storage molecules in the body
  • Match the lipid type with its primary biological function:
    Phospholipids ↔️ Structural component of cell membranes
    Triglycerides ↔️ Energy storage
  • Steroid hormones, which are lipids, act as chemical messengers
  • Lipids such as waxes provide insulation and protection for organisms.
    True
  • Phospholipids have a hydrophobic tail and a hydrophilic head due to their amphipathic nature.

    True