Answer:
a) No, because the heme group that has the ability to bind oxygen is bound via the imidazole ring of a histidine residue
b) The imidazole in solution bind to the heme group and then facilitates its binding to oxygen; however, protein does not have the proximal histidine residues which are capable of triggering conformational changes in the folded protein structure
Answer
Carbon storage and exchange
For example, in the food chain, plants move carbon from the atmosphere into the biosphere through photosynthesis. They use energy from the sun to chemically combine carbon dioxide with hydrogen and oxygen from water to create sugar molecules.
Explanation:
This is just an educated guess. As the purple pigment, caused by anthocyanins, are on the bottom side of the plant, their purpose could probably be to direct the light.
Specifically, a purple pigment on the bottom of the plant would absorb certain wavelengths near the purple spectrum, and reflect other wavelengths back toward the portion of the plant with chlorophyll. In this way, light does not simply pass through the leaf, instead it is reflected back in towards the chlorophyll to maximize the amount of light being used for photosynthesis.
The main source of energy is the Sun. This is because Photosynthesis is a light dependent reaction. If there was no Sun, there would not be any energy. Soil does not provide energy. ATP is energy but that is usually produced in heterotrophic organisms. Finally it cannot be glucose because that is the product of photosynthesis. Hope this helps and feel free to ask me any more questions you may have!