Question

Avena curvature test is bioassay for activity of

• A. Auxin
• B. Ethylene
• C. Cytokinin
• D. Gibberellin

Answer 1

The correct option is A Auxin

Bioassay is a sensitive and specific test that determines the biological activity of hormones by measuring its effect on a specific part of plant material. There are various bioassays to determine the concentration of auxin hormone in the plant such as Avena coleoptile curvature test, split pea stem curvature test, cress root inhibition test. The Avena curvature test is a bioassay for auxin that measures the angle of curvature of a decapitated coleoptile after placing an agar block containing auxin on one side.

Thus, the correct answer is 'Auxin'.