Answer:
the cell wall
Explanation:
cell membrane is not rough and it doesn't support or protect the cell.
cytoplasm is the inner environment of the cell that includes organelles and nutritions. it's not rough and doesn't support or protect the cell.
For example, pH can have an effect of the state of ionization of acidic or basic amino acids. Acidic amino acids have carboxyl functional groups in their side chains. Basic amino acids have amine functional groups in their side chains. If the state of ionization of amino acids in a protein is altered then the ionic bonds that help to determine the 3-D shape of the protein can be altered. This can lead to altered protein recognition or an enzyme might become inactive.
Changes in pH may not only affect the shape of an enzyme but it may also change the shape or charge properties of the substrate so that either the substrate connot bind to the active site or it cannot undergo catalysis.
In geneal enzyme have a pH optimum. However the optimum is not the same for each enzyme.
For the answer to the question above, I believe the answer to your question is
<span>Birth typically occurs 40 weeks after conception. A woman usually gives birth to a child 9 months after the conception. any child that is born under 9 months is premature. </span>
