Question

phosphatidylserine molecules in your body. this molecule can play a role in cells communicating with each other. pretty wild, right? part 1 two regions of the diagram of phosphatidylserine are labeled (a and b). which region(s) contain polar covalent bonds? only region b. neither region a nor region b. both region a and region b. only region a. part 2 which region(s) contain partial charges? only region b. neither region a nor region b. both region a and region b.

Explanation:

• Part 1: Polar covalent bonds occur when there is a significant electronegativity difference between atoms. Region B contains functional - groups like phosphate and amino groups which have polar covalent bonds due to differences in electronegativity between atoms such as O - P and N - H. Region A mainly consists of non - polar hydrocarbon chains with C - C and C - H bonds which are relatively non - polar.
• Part 2: Partial charges are present in regions with polar functional groups. Region B has a charged amino group ($NH_3^+$) and polar bonds in the phosphate group, giving it partial charges. Region A is non - polar and has no partial charges.

Answer:

Part 1: A. Only region B.
Part 2: A. Only region B.