Here are some additional practice problems for conceptual practice: https://www.khanacademy.org/test-prep/mcat/chemical-processes/amino-acids-peptides-proteins-5d/e/amino-acids-and-proteins-questions
This is also a fantastic resource by Buffalo State to review the amino acids and their properties: https://facstaff.buffalostate.edu/bagleyka/470problems/ps2.htm
If you are in a crunch for time, or you really dislike making flashcards, this is the link of the Quizlet I made for this unit when taking biochemistry:
https://quizlet.com/1140619232/biochemistry-exam-1-flash-cards/?i=62s45l&x=1jqt