Exam 2: Molecular Interactions

You are helping your dad prepare food in the kitchen.Dad has a tablespoon of water in one hand and a tablespoon of vegetable oil in the other, when he trips over the rug and spills both spoons on the countertop.Dad notices that the oil forms a thin film on the countertop, whereas spilled water forms smaller, taller beads.How should you explain the different behavior of these liquids to your dad?

A ________ is a homogeneous mixture containing a solvent and a solute.

If in an acid-base reaction H₂SO₄²⁻ donates two H⁺, one mole of H₂SO₄²⁻ would equal how many equivalents?

How many grams of glucose, molecular mass = 180 Daltons, is necessary to make 1 liter of a 1.0 molar solution?

A nucleotide consists of a

List the following in order of increasing mass: atom, molecule, proton, neutron, electron.

The most important polar molecule is ________ because it is practically a universal solvent.

Which of the following biological molecules exhibit the characteristics of saturation, specificity and competition?

Which of the following would be disrupted by changes in free hydrogen ions in solution, thus disrupting the molecule's shape and function?

The most important energy-transferring compound in cells is a nucleotide known as

Your roommate is not a science major but is interested in science and asks you to verify a rumor he has heard: it is theoretically possible for two people to walk through each other without causing harm.Confirm or refute what he has heard, and explain.

The concentration of a solution expresses the amount of

Which of the following types of bonds between adjacent amino acids plays an important role in the shape of globular proteins?

The purines found in DNA are ________ and ________.

If a polypeptide contains 10 peptide bonds, how many amino acids does it contain?

Chemical reactions that occur in the human body proceed at a faster rate due to special catalytic molecules called

Molecules that contain the element carbon are known as

The chemical bonding behavior of an atom is directly determined by the

What are functional groups? List the most common functional groups found in biological molecules.

The designation Ca²⁺ means calcium has