Q: What nullified the idea that all biological catalysts are proteins? Choices: - amino acid theory - discovery of enzymes - discovery of metabolites - discovery of ribozymes A:
discovery of ribozymes

Q: What are substances that the body needs for energy, building materials, and control of body processes? Choices: - molecules - carbons - acids - nutrients A:
nutrients

Q: What is the name of the simplest carbon molecule? Choices: - Buckminsterfullerine - graphite - butane - methane A:
methane

Q: What do aquatic mollusk species use for respiration? Choices: - lungs - phototropism - pores - gills A:
gills