Keystone Review Part 1

Water is a _____ molecule, which lends it to many important properties.

• polar
• nonpolar
• ionic
• metallic

Compounds like H₂O and CO₂ would be ______, which compounds like C₆H₁₂O₆ and C₂H₅O₂N would be _____.

• nonpolar; polar
• polar; nonpolar
• organic; inorganic
• inorganic; organic

A macromolecule contains the elements C,H, and O. It is a polymer of hexagonal rings, and the elements come out to a ratio of ~1:2:1. Which macromolecule would this be?

• carbohydrate
• lipid
• protein
• nucleic acid

A monomer is to a polymer as...?

• a polysaccharide is to a monosaccharide
• a protein is to an amino acid
• a lipid is to a carbohydrate
• a nucleotide is to nucleic acid

Which of the following is not a part of an amino acid?

• amine group
• carboxyl group
• phosphate group
• radical (R) group

The "lock and key" model refers to

• dehydration synthesis
• hydrolysis
• monomers and polymers
• enzyme and substrate

Hydrolysis involves the _____ of water to _____ a polymer.

• removal; break up
• removal; build
• addition; break up
• addition; build

Glucose, a carbohydrate monomer, would be referred to as a(n)

• monolipid
• monosaccharide
• polysaccharide
• amino acid

Biological protein catalysts speed up reactions by

• lowering activation energy
• increasing the reaction temperature
• decreasing the amt of reaction collisions
• all of the above

Which type of cell has a nucleus?

• prokaryote
• eukaryote
• both
• neither