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Q49. Which ONE of the following organelles controls gravitropism in the roots of higher plants? (A) Chromoplast (B) Amyloplast (C) Chloroplast (D) Etioplast Amyloplasts control gravitropism in roots of higher […]

Q48. Which ONE of the following statements regarding spores and gametes isCORRECT?(A) Spores can directly undergo mitosis whereas gametes cannot.(B) Gametes can directly undergo mitosis whereas spores cannot.(C) Neither spores […]

Q47. Which ONE of the following plant taxa contains vascular tissue (xylem andphloem) but not woody tissue?(A) Oak(B) Moss(C) Pine(D) Fern Vascular plants transport water and nutrients through xylem and […]

Q46. Wheat plants treated with prolonged cold temperature at the seedling stageflower earlier than the untreated control. Seeds collected from these treatedindividuals, however, give rise to plants that do not flower […]

Q45. Considering the open chain forms, which of the following pair(s) represent/s anepimer?(A) D–mannose and D–fructose(B) D–glucose and D–mannose(C) D–glucose and D–fructose(D) D–galactose and D–glucose D-glucose and D-mannose are epimers in […]

Q44. In the plot given below, the solid line represents oxygen binding to hemoglobinunder physiological conditions. The broken line represents the condition(s) of(A) High CO2 concentration(B) Increase in 2,3– Bisphosphoglycerate […]

Q43. With respect to sodium dodecyl sulphate – polyacrylamide gel electrophoresis(SDS–PAGE), which of these statement(s) is/are true?(A) Ethidium bromide is used to track the progress of electrophoretic mobility(B)β-mercaptoethanol is used […]

Q42. Given below are four plots obtained from separate experiments on enzymeinhibition kinetics. The velocity (v) of the reaction is plotted at varyingconcentrations of substrate (s) and inhibitor (I). The […]

Q41. The high energy compound(s) is/are:(A) Phosphoenol pyruvate(B) Adenosine monophosphate(C) 1,3–Bisphosphoglycerate(D) Vitamin K Phosphoenol pyruvate and 1,3-bisphosphoglycerate qualify as high-energy compounds due to their high negative standard free energy of […]

Q40. Which of the following are correctly paired?(A) Replication: DnaA(B) Recombination: RecA(C) DNA repair: Rho factor(D) Transcription: Sigma factor Options (A), (B), and (D) are correctly paired, while (C) is […]