Author: admin

Q.52 Regulation of phosphoenolpyruvate carboxylase (PEPCase) governs CO2 fixationin both C4 and CAM (crassulacean acid metabolism) plants. Which one or moreof the following statements with respect to PEPCase activity is/are […]

Q.51 Which one or more of the following statements is/are NOT CORRECT withrespect to pollen development in angiosperm?(A) Tapetal cell wall in all angiosperms breaks down to release the cytoplasmiccontent.(B) […]

Q.50 The schematic depicts an unexpanded plant cell within a hypocotyl with thearrangement of cellulose microfibrils marked on its cell wall.Which one of the following shapes would most likely result […]

Q.49 Although Pseudomonas syringae infection in plants is actively inhibited by theendogenous salicylic acid (SA) of host origin, a successful infection is stillestablished because the bacterium secretes coronatine, an effector […]

Q.48 Rotenone is a chemical often used to kill insect pests on crop plants and fishes inlakes. Rotenone acts by inhibiting electron transport from the NADHdehydrogenase enzyme in Complex I […]

Q.47 Which one of the following statements on Casparian strips is correct?(A) Casparian strips are specific to vascular plants found in epidermal cells.(B) Casparian strips are modifications mostly found in […]

Q.46 If the extracellular concentration of sodium ion (Na+) is ten times more than its intracellular concentration, then the sodium equilibrium potential at 20 °C in mV is ____________ (rounded off […]

Q.45 An organism uses only the glycerophosphate shunt pathway to transport cytosolicNADH to mitochondria. For every two electrons transported, complex I, complexIII, and complex IV of the electron transport chain […]

Q.44 A 100 ml solution of pH 10 was well–mixed with a 100 ml solution of pH 4. ThepH of the resultant 200 ml solution is ___________ (rounded off to […]

Q.43 B cells produce two forms of an immunoglobulin: (i) membrane–bound form,known as B cell receptor (BCR) and (ii) soluble form, known as antibody. Whichof the following statements is/are CORRECT […]