MDCAT Biology MCQ #1692

As a fruit ripens, it becomes soft because the pectin-rich 'cementing' layer between adjacent plant cells dissolves. Which layer of the cell wall is this?

MDCAT Biology MCQ #1692

  1. Question 1

    Q1. As a fruit ripens, it becomes soft because the pectin-rich 'cementing' layer between adjacent plant cells dissolves. Which layer of the cell wall is this?

    • A) Primary wall
    • B) Middle lamella
    • C) Secondary wall
    • D) Plasma membrane

    Answer: Middle lamella

    Explanation: The middle lamella is the first layer formed and acts as cement. The primary wall is tempting but it is formed after the middle lamella.