Biomolecules: Classification and Types
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Questions and Answers

What are the four classes of molecules found in living organisms?

  • Carbohydrates, Lipids, Proteins, and ATP
  • Carbohydrates, Lipids, Proteins, and Vitamins
  • Carbohydrates, Lipids, Proteins, and Hormones
  • Carbohydrates, Lipids, Proteins, and Nucleic Acids (correct)
  • What is the fourth class of molecules found in living organisms, along with Carbohydrates, Lipids, and Proteins?

  • Nucleic Acids (correct)
  • ATP
  • Hormones
  • Vitamins
  • Which of the following molecules are not one of the four classes found in living organisms?

  • Proteins
  • Carbohydrates
  • Lipids
  • Vitamins (correct)
  • What is the class of molecules that includes DNA and RNA?

    <p>Nucleic Acids</p> Signup and view all the answers

    Which of the following is NOT a type of molecule found in living organisms?

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

    What is the typical characteristic of most animal fats?

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

    What is the typical characteristic of plant fats?

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

    What is the typical characteristic of fish fats?

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

    What is the name of the animal fat that is commonly used in cooking?

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

    What is the general term for fats and oils?

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

    What is the result of muscle contraction?

    <p>The length of the muscle shortens</p> Signup and view all the answers

    What is the shape of epithelial cells?

    <p>Polyhedral or rectangular</p> Signup and view all the answers

    What is the function of epithelial cells?

    <p>To form sheets for protection and absorption</p> Signup and view all the answers

    What happens to the muscle cell during muscle contraction?

    <p>It becomes shorter</p> Signup and view all the answers

    What is the role of epithelial cells in the body?

    <p>To protect the body and facilitate absorption</p> Signup and view all the answers

    What is the composition of the two membranes enclosing the organelle?

    <p>Phospholipid bilayer</p> Signup and view all the answers

    What is the characteristic of the outer membrane of the organelle?

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

    What are the infoldings of the inner membrane called?

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

    How many membranes does the organelle have?

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

    What is the function of the cristae in the organelle?

    <p>To increase the surface area for cellular respiration</p> Signup and view all the answers

    What is the primary purpose of the G1/S checkpoint?

    <p>To evaluate the cell's size and environmental conditions</p> Signup and view all the answers

    What happens if the environment is favorable at the G1/S checkpoint?

    <p>The cell proceeds to the S and M phases</p> Signup and view all the answers

    What is evaluated during the G1/S checkpoint?

    <p>Growth factors, nutritional state, and cell size</p> Signup and view all the answers

    What is the outcome if the cell does not receive a go-head signal at the G1/S checkpoint?

    <p>The cell cycle is halted</p> Signup and view all the answers

    What is the significance of the G1/S checkpoint in the cell cycle?

    <p>It ensures the cell's ability to respond to environmental cues</p> Signup and view all the answers

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