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D. Homeostasis- naturally selected function
The second statement is correct. Once the enzyme binds to the specific substrate molecule, structural changes can occur in the enzyme's active site to accommodate the product which is the substrate in a transitional state until the reaction is complete to yield the final product.
When the substrate interacts with the enzyme, it undergoes a chemical reaction that allows the atoms to move relative to each other, and the bonds possibly lengthen or shorten which causes the most reactive groups to move closer to each other causing a shape change.
This shape change in the enzyme makes the substrate more amenable to alteration, as it holds the substrate in a transitional state, which helps speed up the reaction that the enzyme catalyzes.
Answer:
The most basic reason that cells are stained is to enhance visualization of the cell or certain cellular components under a microscope. Cells may also be stained to highlight metabolic processes or to differentiate between live and dead cells in a sample.
Explanation:
The main reason you stain a specimen before putting it under the microscope is to get a better look at it, but staining does much more than simply highlight the outlines of cells. Some stains can penetrate cell walls and highlight cell components, and this can help scientists visualize metabolic processes.
