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The Lipid Bilayer quiz #2 Flashcards

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The Lipid Bilayer quiz #2
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  • What is the purpose of cholesterol in the cell membrane?
    Cholesterol helps maintain the proper fluidity and stability of the cell membrane.
  • Why do phospholipids form a bilayer in the plasma membrane?
    Phospholipids form a bilayer because their hydrophobic tails avoid water while hydrophilic heads interact with water, creating a stable barrier.
  • What membrane surrounds and protects the cell?
    The cell membrane (plasma membrane) surrounds and protects the cell.
  • Describe the structure of a phospholipid.
    A phospholipid has a hydrophilic phosphate head, a glycerol backbone, and two hydrophobic fatty acid tails.
  • Where is the cell membrane located in an animal cell?
    The cell membrane is located at the outer boundary of an animal cell.
  • Why do phospholipids form a bilayer in the cell membrane?
    Phospholipids form a bilayer because their hydrophobic tails avoid water, while hydrophilic heads face the aqueous environment, creating a stable barrier.
  • What is another name for the cell membrane?
    Another name for the cell membrane is the plasma membrane.
  • What is the outer boundary of the cell?
    The cell membrane is the outer boundary of the cell.
  • Is a cell membrane present in both plant and animal cells?
    Yes, both plant and animal cells have a cell membrane.
  • What structure is composed of a phospholipid bilayer?
    The cell membrane is composed of a phospholipid bilayer.
  • What is the function of carbohydrates in cell membrane?
    Carbohydrates function in cell recognition and communication.
  • What are the three components of a phospholipid?
    The three components are a phosphate group (head), a glycerol backbone, and two fatty acid tails.
  • The plasma membrane of a cell consists of:
    The plasma membrane consists of phospholipids, proteins, and cholesterol.
  • What do carbohydrates do in the cell membrane?
    Carbohydrates act as recognition sites and help in cell-to-cell communication.
  • Are cell membranes present in both plant and animal cells?
    Yes, cell membranes are present in both plant and animal cells.
  • The cell membrane is selectively permeable. What does this mean?
    Selectively permeable means the cell membrane allows certain substances to pass through while blocking others.
  • Which is a component of a phospholipid?
    A component of a phospholipid is a phosphate group (head), a glycerol backbone, or a fatty acid tail.
  • Which cell structure is selectively permeable?
    The cell membrane is selectively permeable.
  • What best describes the cell membrane?
    The cell membrane is a selectively permeable, dynamic barrier composed of a phospholipid bilayer with embedded proteins and cholesterol.
  • What molecules make up the cell membrane?
    The cell membrane is made up of phospholipids, proteins, cholesterol, and carbohydrates.
  • What strengthens the cell membrane?
    Cholesterol strengthens the cell membrane by increasing its rigidity and stability.
  • What is the head of a phospholipid made of?
    The head of a phospholipid is made of a phosphate group.
  • What does cholesterol do in the cell membrane?
    Cholesterol regulates membrane fluidity and stability.
  • What are three components of a phospholipid?
    A phospholipid has a phosphate group (head), a glycerol backbone, and two fatty acid tails.
  • What does cholesterol do in the cell membrane?
    Cholesterol helps maintain the fluidity and stability of the cell membrane.
  • What does cholesterol do in a cell membrane?
    Cholesterol modulates membrane fluidity and stability.
  • What does cholesterol do in the cell membrane?
    Cholesterol maintains membrane fluidity and prevents it from becoming too rigid or too fluid.
  • What is the outer boundary of the cell?
    The cell membrane is the outer boundary of the cell.
  • What is another name for the cell membrane?
    Another name for the cell membrane is the plasma membrane.
  • What is the role of cholesterol in cell membranes?
    Cholesterol regulates membrane fluidity and stability.
  • The cell membrane is what type of permeable?
    The cell membrane is selectively permeable.
  • What organelle is made of phospholipids?
    The cell membrane and other organelles like the endoplasmic reticulum and Golgi apparatus are made of phospholipids.
  • What is another name for the cell membrane?
    Another name for the cell membrane is the plasma membrane.
  • What controls what enters and leaves the cell?
    The cell membrane controls what enters and leaves the cell.
  • What is the purpose of the cell membrane?
    The cell membrane serves as a selective barrier, protecting the cell and regulating the movement of substances.
  • What is a cell membrane made of?
    A cell membrane is made of a phospholipid bilayer, proteins, cholesterol, and carbohydrates.
  • What does cholesterol do in the cell membrane?
    Cholesterol helps maintain membrane fluidity and stability.
  • What is the cell membrane made of?
    The cell membrane is made of phospholipids, proteins, cholesterol, and carbohydrates.
  • What are cell membranes made of?
    Cell membranes are made of phospholipids, proteins, cholesterol, and carbohydrates.
  • What does the cell membrane do?
    The cell membrane acts as a selective barrier, controlling the movement of substances and protecting the cell.