that initiates the fixation of carbon The most abundant protein in the world is
ID: 272989 • Letter: T
Question
that initiates the fixation of carbon The most abundant protein in the world is the enzyme in the Calvin cycle. This enzyme is called: 1. a)rubisco b) glyceraldehyde 3-phosphate. c) ATP-synthase. d) ribulose biphosphate. e) crassulacean acid. 2. Which of the following does NOT occur during the Calvin cycle? a) carbon fixation b) oxidation of NADPH c) consumption of carbon dioxide d) splitting of water e) consumption of ATP 3. The C4 mechanism of carbon fixation is an advantage for plants that live in: a) ponds or other bodies of fresh water. b) the shade of other plants. C) hot, dry climates. d) swamps or bogs. e) cool climates. The three different known biochemical pathways organisms will use to photosynthesize include which of the following? 4. a) C3, C4, C5 b) C3, C4, CAM c) C4, C5, CAM d) C3, C5, CAM e) C2, C4, CAM 5. During C4 photosynthesis: a) plants are able to continue producing sugars even when they must close their stomata to reduce water loss during hot days. b) plants are able to produce sugars without any input of carbon dioxide. c) plants are able to generate water molecules to cool their leaves. d) plants are able to reduce water loss by producing more rubisco. e) plants utilize less ATP when producing sugar.Explanation / Answer
1) The correct option is a. Rubisco.
Rubisco is the first protein of many enzymes in the atmospheric carbon fixation pathway. It is the most abundant protein in the biosphere and world.
2) The correct option is c. Consumption of carbon dioxide.
Consumption of carbon dioxide does not occur during the Calvin cycle.
3) The correct option is c. hot, dry climates.
C4 plants grow better than C3 plants under the hot and dry climates when plants close their stomata to conserve water.
4) The correct option is b. C3, C4, CAM.
The three different known biochemical pathways organisms use to photosynthesize include C3, C4 and CAM.
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