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 Auxin Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.
MCQs on Auxin
1. Application of ________ can delay abscission of fruits and leaves at early stages
(a) gibberelic acid
(b) ethylene
(c) auxin
(d) cytokinin
Answer
Answer: (c)
2. Flowering can be induced in pineapple by application of
(a) IAA, IBA
(b) NAA, 2,4-D
(c) Phenyl acetic acid
(d) Cytokinin
Answer
Answer: (b)
3. Find the incorrect match
(a) Abscissic acid - Stomatal closure
(b) IAA - Cell wall elongation
(c) Cytokinin - Cell division
(d) Gibberellic acid - Leaf abscission
Answer
Answer: (d)
4. Uneven distribution of _______ results in phototropic curvature
(a) phytochrome
(b) auxin
(c) gibberellin
(d) cytokinin
Answer
Answer: (b)
5. The Avena curvature test is an accurate bioassay for
(a) ABA
(b) GA3
(c) IAA
(d) Ethylene
Answer
Answer: (c)
6. Which one of these is commonly used synthetic auxin
(a) NAA
(b) IAA
(c) IBA
(d) GA
Answer
Answer: (a)
7. Auxin is transported polarly. Mostly, auxin movement is
(a) acropetal
(b) basipetal
(c) centripetal
(d) both (a) and (c)
Answer
Answer: (b)
8. Removal of apical bud results in
(a) more axillary buds
(b) flowering ceases
(c) more lateral branches
(d) plant growth ceases
Answer
Answer: (c)
9. Commonly applied hormone in tea plantation is
(a) abscisic acid
(b) ethylene
(c) indole-3-acetic acid
(d) zeatin
Answer
Answer: (c)
10. Which of the following combination of hormones will promote differentiation of shoot as well as root in tissue culture?
(a) Gibberellin and abscisic acid
(b) Auxin and abscisic acid
(c) IAA and gibberellin
(d) Auxin and cytokinin
Answer
Answer: (d)