Please answer the 3 following question and provide a short reason why you chose

Question

Please answer the 3 following question and provide a short reason why you chose your answer.

Question #3: (0.8 point)

The zwitterion for K has:

a.) a net charge of +2

b.) a net charge of -2

c.) a net charge of +1

d.) a net charge of –1

e.) a net charge of 0

Question #4: (0.8 point)

The isoelectric point is defined as the pH at which an amino acid is MOST likely to exist as a zwitterion.

a.) True

b.) False

Question #5: (0.8 point)

At pH 1.63, the net charge of E is most likely:

a.) -2

b.) -1

c.) 0

d.) +1

e.) +2

Explanation / Answer

#3 The answer is e.) a net charge of 0. This is a simple definition question. A zwitterion always has a net zero charge

#4 a. True. Again, a definition question. The isoelectric point is when the amino acid has no net charge.

#5 d. +1. A pH of 1.63 is very acidic, which means that all groups that can will be protonated. There are three groups to deal with in Glutamic Acid, and only the amino group will give a charge when protonated.

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects