MCQ on Auxin: Biology is one of the most important and vital sections in NEET. It includes theories, descriptions, discoveries, diagrams, definitions, explanation of differences and relations. Most of the concepts covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12. Other related sources make up for the rest of the syllabus.

In this post we are providing you MCQ on Auxin, which will be beneficial for you in upcoming NEET, AIIMS, JIPMER, PGIMER, CBSE Board, ICSE Board, Class 12th, 11th.

MCQ on Auxin

Q1. Which one of these is commonly used synthetic auxin ?
a) NAA
b) IAA
c) IBA
d) GA

Q2. Uneven distribution of _______ results in phototropic curvature.
a) phytochrome
b) auxin
c) gibberellin
d) cytokinin

Q3. Removal of apical bud results in ________.
a) more axillary buds
b) flowering ceases
c) more lateral branches
d) plant growth ceases

Q4. Application of ________ can delay abscission of fruits and leaves at early stages.
a) gibberelic acid
b) ethylene
c) auxin
d) cytokinin

Q5. Auxin is transported polarly. Mostly, auxin movement is ________.
a) acropetal
b) basipetal
c) centripetal
d) both (a) and (c)

Q6. Commonly applied hormone in tea plantation is ________.
a) abscisic acid
b) ethylene
c) indole-­3-­acetic acid
d) zeatin

Q7. Find the incorrect match.
a) Abscissic acid ­- Stomatal closure
b) IAA ­- Cell wall elongation
c) Cytokinin ­- Cell division
d) Gibberellic acid ­- Leaf abscission

Q8. 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

Q9. Flowering can be induced in pineapple by application of ________.
a) IAA, IBA
b) NAA, 2,4­-D
c) Phenyl acetic acid
d) Cytokinin

Q10. The Avena curvature test is an accurate bioassay for ________.
a) ABA
b) GA3
c) IAA
d) Ethylene

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