Unit 1, Structure of Water and Hydrogen Bonding

Question 1

Polar Molecule

Answer 1

A neutral, or uncharged molecule that has an asymmetric internal distribution of charge, leading to partially positive and partially negative regions.

Question 2

Cohesion

Answer 2

The attraction of molecules for other molecules of the same kind

Question 3

Adhesion

Answer 3

The attraction of molecules for other molecules of a different kind

Question 4

Density

Answer 4

The mass per unit volume of a substance

Question 5

Specific heat capacity

Answer 5

The amount of heat needed to raise the temperature of one gram of a substances by one degree Celsius

Question 6

Heat of vaporization

Answer 6

The amount of energy needed to change one gram of a liquid substance to a gas at constant temperature

Question 7

Biological macromolecule

Answer 7

A large organic molecule such as carbohydrates, lipids, proteins, and nucleic acids

Question 8

Monomer

Answer 8

A molecule that is a building block for larger molecules (polymers). For example, an amino acid acts as the building blocks for proteins.

Question 9

Polymer

Answer 9

A large molecule made of repeating subunits (monomers). For example, a carbohydrate is a polymer that is made of repeating monosaccharides.

Question 10

Carbohydrates

Answer 10

Monosaccharides (simple sugars). Provide cells with quick/short-term energy, source of dietary fiber. ex: Glucose, sucrose, starch, cellulose, chitin

Question 11

Lipids

Answer 11

Fatty acids and glycerol. Provides cells with long-term energy, make up biological membranes. Ex: Fats, phospholipids, waxes, oils, grease, steroids.

Question 12

Proteins

Answer 12

Amino acids. Provide cell structure, send chemical signals, speed up chemical reactions, etc. ex: Keratin (found in hair and nails), hormones, enzymes, antibodies.

Question 13

Nucleic acids

Answer 13

Nucleotides. Store and pass on genetic information. Ex: DNA, RNA