MCQs Questions For Plant Hormones For NEET and Medical Exam 2022

NEET Biology is the scoring paper in the medical entrance examination. Here, you will discover the NEET Biology MCQ Questions for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Biology objective questions on air pollution and improve your subject knowledge & problem-solving skills along with time management. NEET Biology Plant Hormones Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.


Q.1. Formation of the nodule is induced by

(a) IAA
(b) NAA
(c) IBA
(d) Both (a) and (c)

(a) IAA


Q.2. This is the precursor of Indole-3-acetic acid

(a) Methionine
(b) Tryptophan
(c) Glycine
(d) Isopentynyl pyrophosphate

(b) Tryptophan


Q.3. 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

(d) Split pea stem curvature test and Avena curvature test


Q.4. Which of these is not a function of auxin?

(a) inducing callus formation
(b) inducing dormancy
(c) enhancing cell division
(d) maintaining apical dominance

(b) inducing dormancy


Q.5. A widely used rooting hormone is

(a) 2,4, -D
(b) NAA
(c) 2,4,5 – T
(d) Cytokinin

(b) NAA


Q.6. 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

(a) 2,4, -D and 2,4,5 – T


Q.7. Transport of auxin is

(a) non-polar
(b) symplast
(c) apoplast
(d) polar

(d) polar


Q.8. Indole-3-acetic acid is the most common naturally occurring plant hormone of …………… class

(a) Gibberellin
(b) Auxin
(c) Ethylene
(d) Cytokinin

(b) Auxin


Q.9. This hormone is not a growth inhibitor

(a) Dormin
(b) Abscisic acid
(c) Ethylene
(d) IAA

(d) IAA


Q.10. …………….. is a gaseous plant hormone

(a) IBA
(b) Ethylene
(c) Abscisic acid
(d) NAA

(b) Ethylene

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