Question 1
A protein molecule has a molecular weight of 7.70 × 10
5 g/mol. The mass percent of magnesium in the protein is 3.16 × 10
-3%. How many magnesium atom(s) are there in one protein molecule?
◦ 1
◦ 2
◦ 3
◦ 24
◦ 5
Question 2
A tetrapeptide is known to contain four different amino acids (A, B, C, and D). How many different sequences are possible for this polypeptide?
◦ 4
◦ 6
◦ 8
◦ 12
◦ 24