I’m pretty sure the answer is sugar and phosphate.
Answer is D.
you can learn A,B, and C from examining fossils
It has a charge shift, which basically means, since there are 2 charges, that it'll filp it's charge:
- If the atom had a positive charge, it'll become negative
- If the atom had a negative charge, it'll become positive
Hope it helped,
BioTeacher101
