Chapter 2

\(\mathrm{A}(\mathrm{n})\) __________ forms when atoms of two or more elements bond covalently.

Atoms share electrons unequally in a(n) __________bond.

\(\mathrm{A}(\mathrm{n})\) __________ substance repels water.

Hydrogen ions \(\left(\mathrm{H}^{+}\right)\) are __________ a. indicated by \(\mathrm{pH}\) b. protons c. in blood d. all of the above

donates \(\mathrm{H}^{+}\)When dissolved in water, a(n) __________ donates \(\mathrm{H}^{+}\).

\(\mathrm{A}(\mathrm{n})\) __________is a chemical partnership between a weak acid or base and its salt.

Each carbon atom can share pairs of electrons with up to __________ other atom(s).

__________ is a simple sugar (a monosaccharide). a. Glucose b. Sucrose c. Ribose d. Starch e. a and c f. \(a, b,\) and \(c\)

Unlike saturated fats, the fatty acid tails of unsaturated fats incorporate one or more __________.

Which of the following is a class of molecules that encompasses all of the other molecules listed? a. triglycerides b. fatty acids c. waxes d. steroids e. lipids f. phospholipids

__________ are to proteins as __________ are to nucleic acids. a. Sugars; lipids b. Sugars; proteins c. Amino acids; hydrogen bonds d. Amino acids; nucleotides

A denatured protein has lost its __________. a. hydrogen bonds b. shape c. function d. all of the above

__________ consist(s) of nucleotides. a. sugars b. DNA c. RNA d. \(b\) and \(c\)

Match each molecule with its most suitable description. __________chain of amino acids __________energy carrier in cells __________glycerol, fatty acids, phosphate __________two strands of nucleotides one or more sugar monomers __________richest source of energy __________hydrophilic __________number of protons in nucleus __________molecular jiggling a. polar b. phospholipid c. temperature d. DNA e. ATP f. triglycerides g. atomic number h. carbohydrate i. polypeptide