Blog

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 […]

58. Atmospheric CO2  contains the naturally occurring stable carbon isotopes 12C and 13C in the proportion of 98.9% and 1.1%, respectively. Following are some of the statements regarding CO2 assimilation: […]

57. In which molecule would the radiolabel appear the earliest when wheat and sugarcane leaves are fed with 14CO2? (1) Wheat : malate, sugarcane : 3 phosphoglycerate. (2) Wheat : […]

56. Photo-chemically generated ATP is consumed in which one of the following phases of Calvin-Benson cycle? (1) Only carboxylation (2) Only regeneration (3) Carboxylation and reduction (4) Reduction and regeneration […]

55. Calvin-Benson cycle is divided into three phases, namely carboxylation, reduction and regeneration. The following statements are related to the three phases of Calvin-Benson cycle: A. The product of light […]