[BIOCHEM] LESSON 1
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Questions and Answers

What process do some organisms use to convert solar energy into chemical energy?

  • Fermentation
  • Chemosynthesis
  • Cellular respiration
  • Photosynthesis (correct)
  • Which type of variation is defined as differences caused by genetic differences among organisms?

  • Behavioral variation
  • Environmental variation
  • Genotypic variation (correct)
  • Phenotypic variation
  • What is one function of the cell membrane?

  • Store genetic material
  • Conduct cellular respiration
  • Support and protect the cell (correct)
  • Synthesize proteins
  • What defines phenotypic variation in organisms?

    <p>The impact of environmental factors on genetic expression</p> Signup and view all the answers

    What are the two main components of the lipid bilayer in the cell membrane?

    <p>Hydrophilic and hydrophobic</p> Signup and view all the answers

    How do some organisms utilize chemical energy for their metabolic activities?

    <p>By consuming food molecules</p> Signup and view all the answers

    What is the term used for observable traits or characteristics resulting from the interaction of genetics and environment?

    <p>Phenotypic traits</p> Signup and view all the answers

    Which of the following best describes the term 'phospholipid'?

    <p>A molecule with hydrophilic head and hydrophobic tails</p> Signup and view all the answers

    What is the main function of chloroplasts in plant cells?

    <p>Converting light energy into chemical energy</p> Signup and view all the answers

    Which component of the cell membrane allows for the passage of water?

    <p>Protein channels like aquaporin</p> Signup and view all the answers

    What is the primary role of the endoplasmic reticulum (ER) in a cell?

    <p>Production of lipids and proteins</p> Signup and view all the answers

    Which part of the animal cell is responsible for organizing microtubules?

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

    Which statement correctly describes the cytoplasm?

    <p>It is a jelly-like substance where organelles are suspended.</p> Signup and view all the answers

    What distinguishes rough endoplasmic reticulum from smooth endoplasmic reticulum?

    <p>Presence of ribosomes</p> Signup and view all the answers

    Which of the following best describes the function of polar or ionic portions of a molecule?

    <p>They allow the molecule to be water-soluble.</p> Signup and view all the answers

    Which characteristic is unique to centrosomes in animal cells?

    <p>They organize microtubules and contain centrioles.</p> Signup and view all the answers

    What is the primary function of the mitochondria in a cell?

    <p>To produce ATP through cellular respiration</p> Signup and view all the answers

    Which organelle is responsible for storing the genetic information of a cell?

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

    What class of biomolecules is primarily involved in metabolism and can act as enzymes?

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

    Which biomolecule class is recognized as the most abundant on Earth?

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

    Which structure is characterized by its sac-like appearance and is involved in secretion?

    <p>Golgi apparatus</p> Signup and view all the answers

    What role does the nucleus play in hereditary characteristics?

    <p>It controls cell activities and inherits traits.</p> Signup and view all the answers

    Which biomolecules are considered macromolecules and formed by amino acids?

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

    What is the main structural component of the cell membrane?

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

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