Cytoskeletal Structures and Cell Membranes Quiz
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Questions and Answers

Which one of these is a behavioral characteristic of cells deficient in steroid hormones and cholesterol?

  • Improperly functioning lysosomes
  • Deficiency in smooth ER
  • Lack of motility (correct)
  • Lack of membrane proteins

    • What might you expect to see when exposing cells deficient in steroid hormones and cholesterol to very cold conditions in the lab?

  • The distribution of unsaturated and saturated fatty acids in the phospholipid bilayer will determine the cell's behavior in the cold
  • These cells will freeze at a warmer temperature compared to cells without the deficiency
  • Enzymatic reactions in the cell will likely slow down
  • All of the above (correct)

    • What concept in biology can be illustrated by a messy kitchen during remodeling?

  • The second law of thermodynamics (correct)
  • A theory
  • The first law of thermodynamics
  • Active transport

    • Following a meal high in protein, how are amino acids transported and stored in cells?

    <p>Transporter that does not require ATP</p> Signup and view all the answers

    What would you expect to see in cells deficient in steroid hormones and cholesterol?

    <p>None of the above</p> Signup and view all the answers

    What is the purpose of breaking down protein into its component amino acids and storing them in cells?

    <p>For use during translation</p> Signup and view all the answers

    Which of the following is true about amino acid transport into cells?

    <p>Amino acids are transported by active transport</p> Signup and view all the answers

    In the figure above, which egg experienced a weight gain after being placed in a 15% NaCl solution?

    <p>Egg 3</p> Signup and view all the answers

    After placing Egg 2 in an unknown solution, the egg begins to swell. What can you conclude about the unknown solution?

    <p>The unknown solution has a concentration greater than 15% NaCl</p> Signup and view all the answers

    What is the portion of a system's energy that can perform work called?

    <p>Free energy</p> Signup and view all the answers

    Why is ATP important to metabolism?

    <p>Hydrolysis of the bond between adenine and ribose in ATP is commonly used to release energy that can be used to drive other cellular reactions</p> Signup and view all the answers

    What role does amylase play in the breakdown of starch?

    <p>Amylase decreases the activation energy required for the reaction</p> Signup and view all the answers

    Which cytoskeletal structure is composed of actin and regulates cell shape, cell movement, and muscle contraction?

    <p>Microfilaments</p> Signup and view all the answers

    Which organelle is most likely affected in Tay Sachs syndrome, a fatal human disease caused by the accumulation of lipids in the brain?

    <p>Lysosomes</p> Signup and view all the answers

    How can a defect in the inner membrane of mitochondria cause limited exercise ability in individuals?

    <p>A less convoluted inner membrane has less surface area available to create the proton electrochemical gradient needed for ATP production</p> Signup and view all the answers

    A cell biologist has developed a drug that interferes with vesicle transport at the cis face of the Golgi apparatus. Upon which process will this drug have an effect?

    <p>The movement of materials from the Golgi apparatus to the plasma membrane</p> Signup and view all the answers

    During the citric acid cycle, more free energy is released than during glycolysis. However, only 1 molecule of ATP is produced for each molecule of acetyl CoA that enters the cycle. What happens to the remaining free energy?

    <p>Lost as heat</p> Signup and view all the answers

    In the reaction: Pyruvate + CoA + NAD+ → Acetyl CoA + CO2 + NADH, which molecules are oxidized and reduced?

    <p>Pyruvate is oxidized and NAD+ is reduced</p> Signup and view all the answers

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