Q: Just as millions of different words are spelled with our 26-letter english alphabet, millions of different proteins are made with the 20 common what? Choices: - mutation acids - peptides - enzymes - amino acids A:
amino acids

Q: All animals have specialized types of what basic structures, which can then do different jobs? Choices: - proteins - muscles - atoms - cells A:
cells

Q: Q: What science is the study of the shape and arrangement of cells in tissue? Choices: - methodology - cellology - genetics - histology A:
A: histology

Question: Q: Because opposite charges attract, oppositely charged ions attract each other to form what? Choices: - nuclear bonds - particle bonds - soluble bonds - ionic bonds A:
Answer: ionic bonds

*Question*
Q: B cells and t cells are examples of what type of cells? Choices: - heart cells - cancer cells - skin cells - white blood cells A:
**Answer**
white blood cells

*Question*
Q: In a hydrogen replacement reaction, the hydrogen in the acid is replaced by what? Choices: - gas - water - oxygen - an active metal A:
**Answer**
an active metal