NEET Biology MCQ on Auxin with Answers by Expert Teacher. Every Objective Questions is Important and Common of Auxin for NEET-UG Exam.
1) ———- are the organic compounds synthesized in plant body for growth and development.
A) Phytohormone B) Secondary metabolite C) Both of these D) None of these.
Answer: Answer is A, Phytohormone are the organic compounds synthesized in plant body for growth and development.
2) Which of the following building block of auxin?
A) Cytokinin B) Tryptophan C) Methionine D) None of these.
Answer: Answer is B, Tryptophan is the building block of auxin.
3) In auxin movement of substances occurs by:
A) Phloem B) Xylem C) Both of these D) None of these.
Answer: Answer is A, Movement is by phloem in auxin.
4) Which of the following are functions of auxin?
A) Cell elongation B) Apical dominance C) Phototropism D) All of these.
Answer: Answer is D, all the functions are performed by auxin.
5) Which of the following are examples of natural auxin?
A) Indol acetic acid B) Indol butyric acid C) Indol propionic acid D) All of these.
Answer: Answer is D, all are examples of natural auxin.
6) Auxin carry out bending towards light, the phenomenon is known as:
A) Cell elongation B) Apical dominance C) Phototropism D) All of these.
Answer: Answer is C, plant bend towards the light called as phototropism.
7) Auxin is the only plant hormone which is transported via ———– movement.
A) Non polar B) Polar C) Both of these D) None of these.
Answer: Answer is B, remaining all the hormone transport via polar movement.
8) Which of the following are natural antiauxin?
A) Quercitin B) Genistein C) Both of these D) None of these.
Answer: Answer is C, both of these are natural antiauxin.
9) Which of the following are synthetic antiauxin?
A) TIBA B) NPA C) Both of these D) None of these.
Answer: Answer is C, both of these are synthetic antiauxin.
10) Which of the following are examples of synthetic auxin?
A) Picolinic acid B) Dicamba C) 2,4 dichloro phenoxy acetic acid D) All of these.
Answer: Answer is D, all are synthetic auxin.