PKU can result from defects in phenylalanine hydroxylase (PAH), an enzyme that converts phenylalanine into amino acid tyrosine. It has been hypothesized that phenylalanine is both the substrate and an allosteric regulatory molecule for PAH. If this hypothesis is true, complete two models to show how PAH would appear if phenylalanine concentration were low (inactive enzyme) or high (active enzyme).

Low phenylalanine concentration:

High phenylalanine concentration:

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 correct answer: the index of refraction of the second medium is lower i tried this persons answer and it was wrong this person is lying

a few examples of ethical concerns involving genetically engineering of humans include

-privacy of genetically tested people

- potential side effects

-long term effects