47. what is the maximum number of stereoisomers for the following molecule? a. 6 b. 2 c. 8 d. 4 e. 3\n48…

47. what is the maximum number of stereoisomers for the following molecule? a. 6 b. 2 c. 8 d. 4 e. 3\n48. the amino acid aspartate (asp) is a. neutral and nonpolar b. neutral and polar c. basic and polar d. acidic and polar\n49. the amino acid asparagine is a. neutral and nonpolar b. neutral and polar c. basic and polar d. acidic and polar\n50. the amino acid phenylalanine is a. neutral and nonpolar b. neutral and polar c. basic and polar d. acidic and polar

47. what is the maximum number of stereoisomers for the following molecule? a. 6 b. 2 c. 8 d. 4 e. 3\n48. the amino acid aspartate (asp) is a. neutral and nonpolar b. neutral and polar c. basic and polar d. acidic and polar\n49. the amino acid asparagine is a. neutral and nonpolar b. neutral and polar c. basic and polar d. acidic and polar\n50. the amino acid phenylalanine is a. neutral and nonpolar b. neutral and polar c. basic and polar d. acidic and polar

Answer

47.

Explanation:

Step1: Identify chiral centers

The given molecule has 3 chiral centers.

Step2: Use formula for stereoisomers

The formula for the number of stereoisomers of a molecule with (n) chiral centers is (2^n). Here (n = 3), so (2^3=8).

Answer:

c. 8

48.

Brief Explanations:

Aspartate has a carboxyl - containing side - chain ((-CH_2 - COO^-)). It can donate a proton, making it acidic. The charged side - chain makes it polar.

Answer:

d. acidic and polar

49.

Brief Explanations:

Asparagine has an amide side - chain ((-CH_2 - CONH_2)). It has no net charge at physiological pH, so it is neutral. The amide group can form hydrogen bonds, making it polar.

Answer:

b. neutral and polar

50.

Brief Explanations:

Phenylalanine has a non - polar aromatic side - chain ((-CH_2 - C_6H_5)). It has no net charge at physiological pH, so it is neutral.

Answer:

a. neutral and nonpolar