300+ TOP MCQs on Plant Hormones and Answers

NEET Biology is the vey important paper in the medical entrance exam. Here, you will discover the NEET Biology MCQs and Answers for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Biology objective questions on air pollution . NEET Biology Plant Hormones Multiple Choice Questions

MCQs on Plant Hormones :

1. Indole-3-acetic acid is the most common naturally occurring plant hormone of _______ class
(a) Gibberellin
(b) Auxin
(c) Ethylene
(d) Cytokinin

Answer

Answer: (b)

2. This hormone is not a growth inhibitor
(a) Dormin
(b) Abscisic acid
(c) Ethylene
(d) IAA

Answer

Answer: (d)

3. ___________ is a gaseous plant hormone
(a) IBA
(b) Ethylene
(c) Abscisic acid
(d) NAA

Answer

Answer: (b)

4. A widely used rooting hormone is
(a) 2,4, -D
(b) NAA
(c) 2,4,5 – T
(d) Cytokinin

Answer

Answer: (b)

5. The leaf defoliator utilized in the Vietnam war by the USA known as “Agent Orange” was
(a) 2,4, -D and 2,4,5 – T
(b) Ethylene
(c) 2,4, -D and NAA
(d) 2,4,5 – T, ethylene and NAA

Answer

Answer: (a)

6. Transport of auxin is
(a) non-polar
(b) symplast
(c) apoplast
(d) polar

Answer

Answer: (d)

7. Formation of the nodule is induced by
(a) IAA
(b) NAA
(c) IBA
(d) Both (a) and (c)

Answer

Answer: (a)

8. This is the precursor of Indole-3-acetic acid
(a) Methionine
(b) Tryptophan
(c) Glycine
(d) Isopentynyl pyrophosphate

Answer

Answer: (b)

9. This bioassay is used to detect the presence of auxin
(a) Only tobacco pith culture
(b) Tobacco pith culture and Avena curvature test
(c) Tobacco pith culture and Split pea stem curvature test
(d) Split pea stem curvature test and Avena curvature test

Answer

Answer: (d)

10. Which of these is not a function of auxin?
(a) inducing callus formation
(b) inducing dormancy
(c) enhancing cell division
(d) maintaining apical dominance

Answer

Answer: (b)

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