*Question*
Q: What proteins synthesized in cells act as catalysts? Choices: - hormones - virophages - byproducts - enzymes A:
**Answer**
enzymes

*Question*
Q: In statistics a boundary on the precision and accuracy is known as what? Choices: - instance - median - frequency - error A:
**Answer**
error

*Question*
Q: What visual property of soil indicates fertility and nitrogen content? Choices: - texture - contrast - quality - color A:
**Answer**
color

*Question*
Q: What type of plate is an island arc found on? Choices: - continental - coastal - shear - oceanic A:
**Answer**
oceanic