Answer:
The modified hemoglobin with free imidazole cannot be expected to show cooperativity in oxygen binding. The movement of iron ion takes place up in the plane of heme when binding of one subunit of hemoglobin takes place with oxygen. One of the iron's and oxygen's axial ligands comprise the proximal histidine's imidazole ring.
With the movement of iron into the hemoglobin ring, the pulling of proximal histidine takes place along with it. Therefore, when binding of oxygen takes place with one subunit, a modification also takes place in the intersubunit associations, this also comprises displacement of the alpha helix. This phenomenon plays an essential role in modifying the hemoglobin's tensed state to the relaxed state. The withdrawal or mutation of the imidazole ring from the histidine residue does not further permit the cooperative binding as it is not associated physically with the alpha-helix.
Answer:
Cellular respiration releases stored energy in glucose molecules and converts it into a form of energy that can be used by cells.
Explanation:
The water bends everyone's path into a normal line drawn perpendicular to the shoreline, as the people still on the shore are bent farther away from the shoreline than those in the water.
The same thing happens to a ray of light as it moves from air to water, or from a fast medium to a slow
one: it bends toward the normal.
Light does just that when moving between media. It takes the path that takes the least amount of time when you consider the difference in speed between the media.
For example, imagine you are looking out the window. You have air, glass, and then air again. Glass is denser than air, so light from the outside travels from a fast medium, through a slow medium, and back into a fast medium. The light takes its way from the outside to your eye, which spends the least time
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