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Following are certain statements regarding gibberellic acid (GA) signal transduction: (A) DELLA proteins negatively regulate GA signalling. (B) Degradation of GA receptor (GID1) is mediated by DELLA proteins. (C) Ubiquitination […]

A researcher developed a mutant of Arabidopsis plant where the function of SLEEPY 1 (SLY1) containing SCF complex has been disrupted. Which one of the following statements is INCORRECT in […]

Examples of many factors that regulate plant height in response to gibberellic acid (GA) are listed below: A. Binding of a GA bound repressor to the promoter of the DELLA […]

Most of DNA binding protein binds to DNA by particular motif to modulate gene expression. Genes which are under regulation of gibberllin acid have GRE which is recognized by transcription […]

66. Ethylene signaling pathway is important for a fruit ripening. Which one of the following responses is routinely used to identity ethylene signaling pathway components? (1) Cotyledon expansion response (2) […]

The following statements are made to describe auxin signal transduction pathway, from receptor binding to the physiological response: A. Auxin response factors (ARFs) are nuclear proteins that bind to auxin […]

64 Which one of the following plant hormones use the two-component histidine kinase receptor system for signal transduction? (1) Auxin                 (2) Gibberellin (3) Cytokinin          (4) Abscisic […]

63 Match the above columns involving plant hormones and their signalling pathways: Column I                        Column II                        Column III (A) Auxin and                   (a) Trans-                   (i) Response mediated Gibberellins                      […]

62. Programmed cell death (PCD) plays an important role in development of barley aleurone. The following statements are made with respect to involvement of various phytohormones and signaling molecules. A […]

Following are some statements regarding plant growth hormones. A. Ethylene regulates abscission. B. Gibberlins do not play any role in flowering C. Auxin and cytokinin promote cell division. D. Over […]