Answer:
Low phenylalanine concentration:
- If the enzyme is inactive, PAH will look like its inactive form, with phenylalanine located in the allosteric site / inactive site so that PAH is a different shape. This will not allow as much phenylalanine to be converted into tyrosine, as we wait for Phe levels to increase.
High phenylalanine concentration:
- If the enzyme is active, PAH will look like its regular form, with an open active site that's the size of phenylalanine so that reactions can occur. (Like a hand fitting into a glove, or a lock into a key.) Phenylalanine will be the substrate, the thing acted upon by the enzyme. This will eventually raise the amount of tyrosine that's created and lower the concentration of phenylalanine.
Think about it like this. Ever heard of homeostasis? That's how the body likes to be the same, keep everything regulated, all the time. So if there are high levels of something, the body is going to try to keep that something down, and if there are low levels, it's going to try to increase the concentration of that thing.
The answer is B. Genetic drift greatly affects small populations, but large populations can recover.
Answer:
B. The Red Squirrel population would increase.
Explanation:
There isn’t another animal the would eat the Red Squirrels, therefore causing the Red Squirrels to over populate.
Answer:
I'm not 100% sure but I think its A. Here is an article I found on it. I might be wrong.
From what I know its that he learned <span>the moon is very small and has large variations in its surface temperature.</span>
