Q: What according to scientists is the major cause of depression? Choices: - low thyroid levels - high fat diets - high serotonin levels - low serotonin levels A:
low serotonin levels

Q: Enzymes are a type of what, and as such, they are not reactants in the reactions they control? Choices: - hormone - metabolite - neurotransmitter - catalyst A:
catalyst

Q: Q: What element is typically used to shield things from gamma rays? Choices: - gold - silver - aluminum - lead A:
A: lead

Question: Q: What happens to the reaction rate over the course of a reaction? Choices: - reverses - stays the same - speeds up - slows down A:
Answer: slows down

*Question*
Q: What is the most common type of organic compound? Choices: - lipids - hydrocarbons - proteins - carbohydrates A:
**Answer**
carbohydrates

(Question)
Q: What are the effects of light on plant morphology called? Choices: - electrogenesis - Megasporogenesis - Microsporogenesis - photomorphogenesis A:
(Answer)
photomorphogenesis