{"id":84647,"date":"2025-06-01T02:43:17","date_gmt":"2025-06-01T02:43:17","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=84647"},"modified":"2025-06-01T02:43:17","modified_gmt":"2025-06-01T02:43:17","slug":"the-plant-growth-regulators-are-small-simple-molecules-of-diverse-che","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/the-plant-growth-regulators-are-small-simple-molecules-of-diverse-che\/","title":{"rendered":"The plant growth regulators are small, simple molecules of diverse che"},"content":{"rendered":"

The plant growth regulators are small, simple molecules of diverse chemical composition. They are<\/p>\n

[amp_mcq option1=”carbohydrates, fats and proteins” option2=”indole compounds, adenine derivatives, carotenoids and terpenes” option3=”fatty acids, glucose and vitamins” option4=”vitamin C, vitamin D and glucose” correct=”option2″]<\/p>\n

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This question was previously asked in<\/div>\n
UPSC CDS-1 – 2017<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
Plant growth regulators are small, simple molecules including indole compounds, adenine derivatives, carotenoids and terpenes.<\/section>\n
Plant growth regulators (PGRs), also known as phytohormones, are organic compounds other than nutrients which in small amounts promote, inhibit or otherwise modify any physiological process in plants. The main classes of PGRs include Auxins (indole compounds, e.g., IAA), Cytokinins (adenine derivatives, e.g., kinetin), Gibberellins (terpenes, e.g., GA3), Abscisic Acid (carotenoid derivatives\/terpenes, e.g., ABA), and Ethylene (a gaseous hormone). These chemical classifications align with the options provided.<\/section>\n
Carbohydrates, fats, and proteins are macronutrients providing energy and building blocks. Vitamins are essential micronutrients, primarily for animal metabolism (some roles in plants are indirect). Fatty acids and glucose are basic organic molecules and metabolic intermediates, not classified as plant growth regulators in the same way as phytohormones.<\/section>\n","protected":false},"excerpt":{"rendered":"

The plant growth regulators are small, simple molecules of diverse chemical composition. They are [amp_mcq option1=”carbohydrates, fats and proteins” option2=”indole compounds, adenine derivatives, carotenoids and terpenes” option3=”fatty acids, glucose and vitamins” option4=”vitamin C, vitamin D and glucose” correct=”option2″] This question was previously asked in UPSC CDS-1 – 2017 Download PDFAttempt Online Plant growth regulators are … <\/p>\n

Detailed SolutionThe plant growth regulators are small, simple molecules of diverse che<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1087],"tags":[1101,1117,1211],"class_list":["post-84647","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-1","tag-1101","tag-biology","tag-plant-hormones","no-featured-image-padding"],"yoast_head":"\nThe plant growth regulators are small, simple molecules of diverse che<\/title>\n<meta name=\"description\" content=\"Plant growth regulators are small, simple molecules including indole compounds, adenine derivatives, carotenoids and terpenes. Plant growth regulators (PGRs), also known as phytohormones, are organic compounds other than nutrients which in small amounts promote, inhibit or otherwise modify any physiological process in plants. The main classes of PGRs include Auxins (indole compounds, e.g., IAA), Cytokinins (adenine derivatives, e.g., kinetin), Gibberellins (terpenes, e.g., GA3), Abscisic Acid (carotenoid derivatives\/terpenes, e.g., ABA), and Ethylene (a gaseous hormone). These chemical classifications align with the options provided.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/the-plant-growth-regulators-are-small-simple-molecules-of-diverse-che\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The plant growth regulators are small, simple molecules of diverse che\" \/>\n<meta property=\"og:description\" content=\"Plant growth regulators are small, simple molecules including indole compounds, adenine derivatives, carotenoids and terpenes. Plant growth regulators (PGRs), also known as phytohormones, are organic compounds other than nutrients which in small amounts promote, inhibit or otherwise modify any physiological process in plants. The main classes of PGRs include Auxins (indole compounds, e.g., IAA), Cytokinins (adenine derivatives, e.g., kinetin), Gibberellins (terpenes, e.g., GA3), Abscisic Acid (carotenoid derivatives\/terpenes, e.g., ABA), and Ethylene (a gaseous hormone). These chemical classifications align with the options provided.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/the-plant-growth-regulators-are-small-simple-molecules-of-diverse-che\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T02:43:17+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"The plant growth regulators are small, simple molecules of diverse che","description":"Plant growth regulators are small, simple molecules including indole compounds, adenine derivatives, carotenoids and terpenes. 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