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68 Which one of the following statements regarding PEPCase is INCORRECT? (1) During the day, C4 PEPCase is inactive whereas CAM PEPCase is active. (2) PEPCase is inactivated by dephosphorylation. […]

Following are certain statements regarding CO2 assimilation in higher plants: A. The action of aldolase enzyme during Calvin-Benson cycle produces fructose 1,6-bisphosphate. B. The conversion of glycine to serine takes […]

66. Following are certain statements regarding C2, C3, C4 and CAM carbon metabolism in plants. A. In C3 cycle, one molecule of 3-phosphoglycerate formed during carboxylation phase is utilized for […]

65. Which one of the following graphs best represents the net CO2 fixation of typical C3 and C4 plants under increasing CO2 concentration and saturating light? Introduction Understanding how C3 […]

64. The quantum yield of photosynthetic carbon fixation in a C3 plant and C4 plant is studied as a function of leaf temperature. Following are some statements based on this […]

63. Following are certain statements regarding C3, C4 and CAM plants? A. The ratio of water loss to CO2 uptake is higher in CAM plants than it is in either […]

62. Following are some of the statements regarding the effect of CO2 concentration on photosynthesis in plants. A.With elevated CO2 levels, C3 plants are much more responsive than C4 plants […]

61. The C4 carbon cycle is a CO2 concentrating mechanism evolved to reduce photorespiration. The following are stated as important features of the C4 pathway: A. The leaves of C4 […]

The CO2 compensation point for C3 plants is greater than C4 plants because in C4 plants (1) dark respiration is higher (2) dark respiration is lower (3)photorespiration is present (4) […]

59. For which one of the following physiological studies 12CO2 and 13CO2 are used? (1) Estimate the rate of photosynthesis (2) Determine rate of photorespiration (3) The ratio of C3 […]