General Biology
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Questions and Answers

What does the cell theory state about all living organisms?

  • All living organisms are unicellular.
  • All living organisms arise from spontaneous generation.
  • All living organisms are composed of one or more cells. (correct)
  • All living organisms are capable of spontaneous generation.
  • Which scientist is known for stating that all cells arise from pre-existing cells?

  • Theodor Schwann
  • Robert Hooke
  • Rudolf Virchow (correct)
  • Antonie Philips van Leeuwenhoek
  • What does the term 'abiogenesis' refer to?

  • The idea that diseases are caused by microorganisms.
  • The belief that life arises spontaneously from non-living matter. (correct)
  • The generation of life from living matter.
  • The study of cell division.
  • What is the smallest fundamental unit of life according to cell theory?

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

    Which of these correctly defines a tissue?

    <p>A collection of similar cells carrying out related functions.</p> Signup and view all the answers

    According to the cell theory, what is stated about unicellular and multicellular organisms?

    <p>Both unicellular and multicellular organisms are composed of cells.</p> Signup and view all the answers

    What misconception did people have regarding spontaneous generation?

    <p>Living organisms can arise from non-living matter.</p> Signup and view all the answers

    What role do organ systems play in an organism?

    <p>They perform a singular function in coordination.</p> Signup and view all the answers

    What is the primary function of glucagon in the body?

    <p>Increases blood sugar levels</p> Signup and view all the answers

    Which of the following is NOT one of the main jobs of cells?

    <p>Make waste</p> Signup and view all the answers

    What is the role of the cell membrane?

    <p>Controls the movement of materials in and out</p> Signup and view all the answers

    Which statement accurately describes phospholipids?

    <p>They consist of two fatty acid chains and a phosphate group.</p> Signup and view all the answers

    What characterizes the division of labor in cells?

    <p>Each type of cell has specialized functions.</p> Signup and view all the answers

    What substance do aquaporins specifically transport across the cell membrane?

    <p>Water molecules</p> Signup and view all the answers

    What can be inferred about the relationship between cells and energy?

    <p>All cell functions require energy.</p> Signup and view all the answers

    In what way do plants and animal cells differ concerning the cell wall?

    <p>Plant cells have a cell wall made of carbohydrates.</p> Signup and view all the answers

    What role does the cell wall primarily serve in plant cells?

    <p>Support and protection</p> Signup and view all the answers

    Which of the following organisms have a cell wall made of cellulose?

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

    Which organelle is primarily responsible for the production of ATP?

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

    What is the term for programmed cell death?

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

    What are plasmids commonly associated with in bacteria?

    <p>Antibiotic resistance</p> Signup and view all the answers

    What is the main function of flagella in certain cells?

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

    Which statement about chloroplasts is false?

    <p>They are found in animal cells.</p> Signup and view all the answers

    What distinguishes prokaryotic cells from eukaryotic cells?

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

    What is the role of phospholipids in prokaryotic cells?

    <p>They attach cells to surfaces and provide protection.</p> Signup and view all the answers

    Which part of the cell membrane is described as hydrophilic?

    <p>The polar head of the phospholipid.</p> Signup and view all the answers

    What does the term 'selective permeable membrane' refer to?

    <p>A membrane that selectively chooses which molecules can enter the cell.</p> Signup and view all the answers

    What functions are associated with the cytoplasm?

    <p>It provides a jelly-like medium for organelles.</p> Signup and view all the answers

    Which characteristic differentiates non-polar molecules from polar molecules?

    <p>Non-polar molecules may not allow water to enter.</p> Signup and view all the answers

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

    <p>To serve as a storehouse of genetic information.</p> Signup and view all the answers

    How does protein synthesis occur within the cell?

    <p>By using mRNA to convert DNA into amino acid chains.</p> Signup and view all the answers

    Which structure is responsible for the rigid support of the cell?

    <p>Cell wall</p> Signup and view all the answers

    What is the primary function of ribosomes in the cell?

    <p>Protein synthesis</p> Signup and view all the answers

    Which type of RNA is responsible for carrying genetic information from DNA to ribosomes?

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

    What is a key function of the smooth endoplasmic reticulum (SER)?

    <p>Lipid synthesis</p> Signup and view all the answers

    What is the role of the Golgi apparatus in the cell?

    <p>Sorting and packaging of proteins</p> Signup and view all the answers

    Which cellular process involves white blood cells engulfing bacteria?

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

    What structure acts as a storage sac within the cell?

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

    What is the main purpose of peroxisomes within a cell?

    <p>Detoxification of toxic substances</p> Signup and view all the answers

    Which sequence best describes the path taken by proteins as they are synthesized and processed?

    <p>Nucleus → Ribosomes → ER → Golgi Apparatus → Vesicles</p> Signup and view all the answers

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