MDCAT Biology MCQ #2438

In the process of phototropism, a plant stem bends towards light. On which part of the stem does auxin accumulate to facilitate elongation?

MDCAT Biology MCQ #2438

  1. Question 1

    Q1. In the process of phototropism, a plant stem bends towards light. On which part of the stem does auxin accumulate to facilitate elongation?

    • A) Lighted side
    • B) Shaded side
    • C) Root cap
    • D) Vascular cambium

    Answer: Shaded side

    Explanation: Auxin accumulates on the shaded side, causing cell elongation; the lighted side fails because auxin is sensitive to light and migrates.