The nitrogenous base that is only found in DNA is and not in RNA is __________.

You walk down into your basement to find that the carpeting on the floor is damp. Concerned, you look around for large puddles of water or broken pipes, but find none. In fact, only the basement floor and carpeting is damp. You realize that water must have wicked into the carpet from the floor by __________.

Egg whites consist primarily of water and the protein albumin. When you fry an egg, why does the egg white turn from clear to white?

Dr. Ratard was trying to determine the cause of a mysterious epidemic affecting fish in the gulf of New Mexico. His proposal that the deaths were caused by an organism called a protist is considered a/an __________.

Microfilaments such as actin, microtubules, and the intermediate filaments form the cell-supporting structure called the __________.

Atoms of a single element that possess different numbers of neutrons are called __________.

Three fatty acids bonded together with a glycerol are found in a/an __________.

Cells that produce a lot of lipids for membranes would have an enlarged __________.

Humans are unable to get metabolic energy from cellulose because __________.

Protists lack membrane-bounded nucleus.