Exam 2: The Molecules of Life

Which of the following are found in RNA but not in DNA?

The uncharged component of the atom is the

Atoms that gain electrons become

The mass number of an atom is equal to

The part of the atom that is most involved in chemical reactivity is the

A protein

Dehydration reactions are involved in

The negatively charged component of the atom is the

Which shows the incorrect complementary base pairing?

Phospholipids are polar molecules.

Select the False statement regarding protein denaturation.

The most important molecule(s) in the world is (are)

Alpha helices and beta pleated sheets form a protein's

Lipids, like nucleic acids and proteins, are made of chains of similar subunits.

The atom, as a whole, is uncharged because

Dan is a body builder. He decides that he is going to change his diet in an effort to increase his muscle mass. Dan tells you that he plans to eat vegetables and proteins but no fats or carbohydrates, because cells do not naturally contain these molecules and do not need them. You advise Dan that his new diet is not a good choice, and that he would do better to follow a well balanced diet that incorporates healthy amounts of proteins, fats AND carbohydrates. -Dan is confused about the reason you advise him that in fact a healthy diet includes fats. He tells you that all fats are bad fats. You correct him, telling him that lipids are essential for cells. Which of the following is NOT True of lipids?

The primary structure in a protein refers to

The -OH group in a carbohydrate

L-amino acids occur in proteins and are designated

Dan is a body builder. He decides that he is going to change his diet in an effort to increase his muscle mass. Dan tells you that he plans to eat vegetables and proteins but no fats or carbohydrates, because cells do not naturally contain these molecules and do not need them. You advise Dan that his new diet is not a good choice, and that he would do better to follow a well balanced diet that incorporates healthy amounts of proteins, fats AND carbohydrates. -You tell Dan that while many of his cell components do indeed contain amino acids, carbohydrates and lipids are also essential for cells. Which of the following components contain both amino acids AND lipids?