Groups

Question 1

R-OH

Answer 1

hydroxl group (polar)

Question 2

R-CH3

Answer 2

mthyl group (polar)

Question 3

R_COOH
R_COO^-

Answer 3

carboxyl group (polar)

Question 4

R-NH2

Answer 4

amino groups (polar)

Question 5

R-PO4

Answer 5

phosphate group (polar)

Question 6

R-SH

Answer 6

sulfhydryl group (can be nonpolar and polar depending on its location)