Unit 1 Biochemistry

All major macromolecules are assembled by chains of subunits called monomers. No matter what the polymer, the monomers are linked using the same type of chemical reactions. Which statement best describes the dehydration reaction?

• When monomer A is joined to monomer B, a hydration shell is formed around them.

• When monomer A is joined to monomer B, a molecule of water is added between the two monomers

• When monomer A is joined to monomer B, a molecule of water is released.

• When monomer A is joined to monomer B, a chain of water molecules holds them together.

Each type of macromolecule contains a particular monomer. Which macromolecule below is INCORRECTLY matched with its monomer?

• lipids...glycogen

• carbohydrate...monosaccharide

• nucleic acid...nucleotide

• protein...amino acid

Water has specific cohesive properties due to

• being composed of two hydrogen atoms held to an oxygen atom by ionic bonds.

• hydrogen bonding between water molecules.

• the attraction between water and other polar substances.

• the fact that water is a good solvent.

What reaction is this?

• hydrolysis

• enzymatic

• ionization

• dehydration

Unsaturated fats differ from saturated fats by their fatty acid tails containing which of the following items?

• Single bonds

• double bonds

• cholesterol

• phosphate groups

What is this chemical reaction?

• dehydration

• hydrolysis

Which molecular interaction is the strongest?

• hydrogen bond

• ionic bond

• covalent bond

Carbon compounds that come from living organisms are called _____ compounds.

• biological

• homogeneous

• water

• organic

Which is NOT an organic compound?

• carbohydrates

• water

• nucleic acids

• proteins

The main function of carbohydrates is

• to provide quick energy

• to store backup energy

• to store genetic information

• to speed up chemical reactions