of the molecules in this list, which is the original donor of electrons that are
ID: 213169 • Letter: O
Question
of the molecules in this list, which is the original donor of electrons that are passed along through activities in the reaction center. a. Water e b. Hydrogern O c. Carbor e d. Photons e e. Oxygen QUESTION 24 CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they o a. use the enzyme phosphofructokinase, which outcompetes rubisco for CO2. e b. fix CO2 into sugars in the bundle sheath cells O c. fix CO2 into organic acids during the night. e d. use photosystem I and photosystem Il at night O e. fix CO2 into pyruvate in the mesophyll cells. QUESTION 25 What energy rich organic compound is produced as a result of the Calvin cycle? e a. NADPH b. 2 O C. ATPExplanation / Answer
1) the electron donor is water. It gives electron , reduces chlorophyll and produces oxygen as a byproduct.
2) C.
CAM plants fix their carbon as organic acids(eg, malate) during night. So, at night time their stomata remaim opem to collect Co2 and to convert it into acid. At morning they convert that acid into carbondioxide and use it for photosynthesis. As they have enough canbordioxide inside their body they do not need to upen up the stomata to get that.
3) I think that you have not taken the photo properly. It should have one more option for GLUCOSE. Glucose is produced in calvin cycle with the helo of ATP and NADPH. This is an organic compount which is called the plant's food. In later stages, energy is produced by breaking down the glucose into ATP.
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