When people are addicted to a substance and they try to stop using it, they often experience
A. tolerance
B. physical dependence
C. withdrawal
D. psychological dependence

Group of genes that encode molecules found in all body cells, creating a biochemical “fingerprint” that serves as the “id” for cells so that they are marked as “self” a) deoxyribonucleic acid (dna) b) entry inhibitors c) major histocompatibility complex (mhc) d) non-nucleoside reverse transcription inhibitors (nnrtis)