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Cell wall Knowledge-Based Practice

Biology · Cell Structure & Function · Biology · Organelles

5 Biology practice questions on Cell wall. Questions that assess core concepts and understanding.

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Questions

  1. 1.

    When a plant cell is placed in a hypotonic solution, which physical mechanism exerted by the cell wall prevents the cell from bursting due to osmotic water intake?

    • A) Selective closing of wall pores to completely block further water entry
    • B) Active transport of surplus water molecules into the extracellular matrix
    • C) Rapid chemical breakdown of internal solutes to lower cytoplasmic osmolarity
    • D) Generation of wall pressure that opposes further net osmotic influx of water
  2. 2.

    In mature plant cells that have ceased expanding, which structure is deposited between the primary cell wall and the plasma membrane to provide additional mechanical strength and rigidity?

    • A) Middle lamella
    • B) Secondary cell wall
    • C) Extracellular matrix
    • D) Plasmodesma
  3. 3.

    Which component of the plant cell wall complex is rich in pectins and functions primarily as an adhesive layer that cements adjacent cells together?

    • A) Secondary cell wall
    • B) Plasmodesma
    • C) Middle lamella
    • D) Primary cell wall
  4. 4.

    Which of the following characteristics distinguishes the cell wall from the plasma membrane in plant cells?

    • A) Being selectively permeable to regulate the passage of specific ions and organic solutes
    • B) Being freely permeable to water and small dissolved solutes while providing mechanical support against osmotic lysis
    • C) Consisting primarily of a fluid phospholipid bilayer embedded with transmembrane transport proteins
    • D) Acting as a metabolically active barrier capable of driving endocytosis and exocytosis
  5. 5.

    Which of the following statements correctly describes the structural composition and primary biological function of the cell wall in plant cells?

    • A) It is primarily composed of peptidoglycan and actively controls the selective transport of macromolecules into the cytoplasm.
    • B) It consists predominantly of chitin polymers and serves as the primary site of cellular ATP production during aerobic respiration.
    • C) It is made of a phospholipid bilayer with embedded proteins and functions to regulate the osmotic potential of the vacuole.
    • D) It is composed primarily of cellulose microfibrils and provides mechanical rigidity while preventing osmotic lysis.

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