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.
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)