What was the purpose of the vinegar in the third trial? a. test the effect of raising ph on enzyme action b. test the effect of lowering ph on enzyme action c. serve as a control d. served no purpose

1. which of the following is correct regarding opiates/opioids: a. they all have a natural component as a starting pointb. they have low addiction possibilitiesc. methadone binds to some of the same receptorsd. a and care correcte. all are correct

If the coding part of an mrna molecule is 1800 nucleotides (bases) in length, this molecule will contain codons and code for a polypeptide that is amino acids long.

What causes darkening of the skin as melanin production increases