NAA (alpha Naphthalene acetic acid) and 2,4 Dichlorophenoxy acetic acid are synthetic auxins. Normally, auxins inhibit flowering. In litchi and pineapple, it promotes flowering. Related Theory Antiauxins are a group of chemicals that can prevent auxin-action in plants. Transcinnamic acid, ascorbic acid, 7-phenyl butyric acid are some of these antiauxins. Probably, an antiauxin competes with an auxin for the same site of reaction and thus inhibits auxin-action.
The pineapple which under natural condition is difficult to blossom has been made to produce fruits throughout the year by application of:
NEET UG 2013 — Botany Plant - Growth and Development
2013mcqeasy
The pineapple which under natural condition is difficult to blossom has been made to produce fruits throughout the year by application of:
Official previous-year question
Held on 30 Apr 2013 · Verified 9 Jul 2026.
Options
- A
NAA, 2, 4-D
- B
Phenyl acetic acid
- C
Cytokinin
- D
IAA, IBA
Did you get this right?
Sign in to track your attempts and accuracy.
Your note
Sign in to keep a private note on this question. Nothing you write is ever public.
NEET UG Plant - Growth and Development in other years
Plant - Growth and Development 2025Plant - Growth and Development 2024Plant - Growth and Development 2023Plant - Growth and Development 2022Plant - Growth and Development 2021Plant - Growth and Development 2020Plant - Growth and Development 2019Plant - Growth and Development 2017Plant - Growth and Development 2016Plant - Growth and Development 2015Plant - Growth and Development 2014Plant - Growth and Development 2012
More NEET UG Plant - Growth and Development questions
Which one of the following phytohormones promotes nutrient mobilization which helps in the delay of leaf senescence in plants?
2025easy
Read the following statements on plant growth and development. (A) Parthenocarpy can be induced by auxins. (B) Plant growth regulators can be involved in promotion as well as inhibition of growth. (C) Dedifferentiation is a pre-requisite for re-differentiation. (D) Abscisic acid is a plant growth promoter. (E) Apical dominance promotes the growth of lateral buds. Choose the option with all correct statements.
2025medium
Spraying sugarcane crop with which of the following plant growth regulators, increases the length of stem, thus, increasing the yield?
2024medium
Given below are some statements about plant growth regulators. A. All GAs are acidic in nature. B. Auxins are antagonists to GAs. C. Zeatin was isolated from coconut milk. D. Ethylene induces flowering in Mango. E. Abscisic acid induces parthenocarpy. Choose the correct set of statements from the options given below:
2024hard
F. Skoog observed that callus proliferated from the internodal segments of tobacco stem when auxin was supplied with one of the following except :
2024easy
Other Botany topics for NEET UG
Keep practicing Plant - Growth and Development
Work through every NEET UG Plant - Growth and Development PYQ, year by year.