The smooth endoplasmic reticulum is responsible for:  

Exocytosis functions to:  

What class of biological molecules does cholesterol belong to?

An acidophilic bacterium is called this because it loves.    

Which subatomic particle has a negative charge?  

All organic compounds contain.

Starch is primarily used by plants for:

An isotope differs from another atom of the same element by its number of:  

Hydrogen bonds occur between:

_______ makes up the nucleus of an atom.