Question

Name the plant hormone responsible for elongation of cells.

• A. Auxin
• B. Gibberellin
• C. Abscisic acid
• D. Cytokinins

Answer 1

The correct option is A Auxin

• Auxins are generally produced by the growing apices of the stem and roots, from where they migrate to the regions of their action. For example, IAA and indole butyric acid(IBA).
• The primary function of the auxin hormones is to elongate plant cells in the stem. For Example, auxins are the hormones responsible for phototropism, the growth of a plant toward the light.
  
• Hence The plant hormone responsible for elongation of cells. is Auxin.
• So, the correct answer is 'Auxin'.