Q: What does the coefficient in front of an element in a formula indicate? Choices: - number of atoms - place on the Periodic Table - time of the reaction - how much is involved in the reaction A:
how much is involved in the reaction

Q: Cellulose is the main structural component of what part of the plant cell, and makes up over thirty percent of plant matter? Choices: - flowers - roots - proteins wall - cell wall A:
cell wall

Q: Q: What is the term for the small particles that rocks are worn down to by water and wind? Choices: - fragments - pebbles - organisms - sediments A:
A: sediments

Question: Q: What do fish have that allow them to "breathe" oxygen in water? Choices: - lungs - layers - pores - gills A:
Answer: gills

*Question*
Q: What organ do mammals have that is exceptionally large for their body size? Choices: - lungs - heart - liver - brain A:
**Answer**
brain

Q: Q: What catalyzes the hydrolysis of amino acids from the n-terminal end of a protein? Choices: - synthase - testosterone - nucleic acid - aminopeptidase A:
A: aminopeptidase