Polymerase Chain Reaction (PCR) is a technique to make multiple copies of target DNA sequence and make it applicable for the downstream processes.
PCR Reagents include primers which are short single strand DNA fragments known as oligonucleotides that is a complementary sequence to the target DNA region and a DNA polymerase.
Cell Culture refers to methods used to cultivate, propagate, and grow eukaryotic and prokaryotic cells under controlled conditions.
Immunology is the study of the human defense wall - the immune system.
Microbiology is the study of the biology of microbes such as viruses, bacteria, algae, fungi, slime molds, and protozoa.