Q: Cells that are divided by oncogenes contain damaged what? Choices: - bacteria - cells - atoms - dna A:
dna

Q: What adds phosphate groups to receptor proteins at the surface of the cell? Choices: - nitrogen kinases - brain kinases - protein kinases - receptor kinases A:
receptor kinases

Q: What is the name of the muscle at the end of the esophagus? Choices: - neck - intestine - throat - sphincter A:
sphincter