Tamil Nadu SSLC (Class 10) Plant and Animal Hormones — practice questions
24 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Tamil Nadu SSLC (Class 10) Plant and Animal Hormones in the app →Among the five major plant hormones, which group acts as growth inhibitors rather than growth promoters?Which plant hormone was the first to be discovered and is produced at the tip of stems and roots?The suppression of growth of lateral buds by auxins produced in the apical bud is known as which phenomenon?In Went's classic experiment, why did the decapitated Avena coleoptile grow straight up after an agar block thWhich of the following is a synthetic auxin rather than one naturally produced by plants?The cytokinin isolated from Zea mays that promotes cell division in plant cells is named:The delay of ageing in plants caused by the application of cytokinin is given which specific name?The internodal elongation seen in rice plants suffering from Bakanae or foolish seedling disease is caused by Treatment of a rosette plant with gibberellin causes sudden shoot elongation followed by flowering. This respoWhich plant hormone is called the stress hormone because it increases plant tolerance to stress and causes stoIn the activity where unripe tomatoes are bagged with a ripe banana, the tomatoes ripen because the banana relWhich gland is anatomically composed of an anterior adenohypophysis and a posterior neurohypophysis?The pituitary gland is called the master gland chiefly because it:Oversecretion of growth hormone during childhood, leading to abnormal overgrowth and increased height, resultsA deficiency of antidiuretic hormone (ADH) reduces water reabsorption in the kidney tubules, producing which dBoth triiodothyronine (T3) and thyroxine (T4) are secreted by which gland, whose two lobes are joined by an isAn enlargement of the thyroid gland appearing as a swelling in the neck due to inadequate iodine in the diet iRemoval of the parathyroid glands during a thyroidectomy lowers parathormone and produces sustained muscle conIn the islets of Langerhans, glucagon and insulin are secreted respectively by which cells?A diabetes mellitus patient shows hyperglycemia, glycosuria, polyuria, polydipsia and polyphagia. The root cauEpinephrine and norepinephrine, released during stress and emotion, are called emergency hormones and are secrThe mineralocorticoid aldosterone, secreted by the zona glomerulosa of the adrenal cortex, mainly acts to:The hormone thymosin, which stimulates the production and differentiation of lymphocytes, is secreted by the:In the female, the luteinizing hormone (LH) from the anterior pituitary mainly brings about: