There will not be a test on these words. They are here to provide you with increased understanding of the book, and to provide opportunities for extra credit. Notice the posters on one of the our bulletin boards.
Apprehensive means "anxious or fearful about what may happen." Jonas is feeling apprehensive about the upcoming Ceremony of Twelve.
Remorse means a deep feeling of sorrow or guilt over a wrong that one has done.
Transgression means the breaking of a law or rule; sin.