PLANT PHYSIOLOGY
TRANSPORT IN PLANT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Higher temperature allows carbon dioxide to diffuse into the leaves faster.
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Higher temperature allows water to be transported to the leaves faster.
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Higher temperature allows the stomata to open wider.
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Higher temperature allows the enzymes to function better.
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Detailed explanation-1: -The rate of photosynthesis increases as the temperature rises. During photosynthesis, a temperature of more than 40 °C slows down the process. Because it is an enzyme-controlled process, this is the case. It occurs as a result of enzymes being involved in temperature-sensitive chemical processes.
Detailed explanation-2: -As temperature increases the number of collisions increases, therefore the rate of photosynthesis increases. However, at high temperatures, enzymes are denatured and this will decrease the rate of photosynthesis.
Detailed explanation-3: -At low temperatures, the rate of photosynthesis is limited by the number of collisions between enzymes and substrate. As temperature increases the number of collisions increases, therefore the rate of photosynthesis increases.
Detailed explanation-4: -Photosynthesis is an enzyme specific process. All enzymes act at an optimum temperature (i. e., 25−35∘C). if temperature increases, enzyme gets denatured, thus leading to a fall in the rate of photosynthesis.
Detailed explanation-5: -The enzyme Rubisco, short for ribulose-1, 5-bisphosphate carboxylase/oxygenase, is the enzyme that incorporates CO2 into plants during photosynthesis. As it constitutes about 30% of the total protein in a plant leaf, Rubisco is probably the most abundant protein on earth and a major sink for plant nitrogen.