Structure and Function of Macromolecules

What effect do enzymes have on the rate (speed) of a reaction?

• Increase the speed

• Monitor the speed

• Decrease the speed

• Have no effect on the speed

Enzymes bring about their effect on the rate of reaction by

• Increasing activation energy

• Lowering the energy of the products

• Lowering the activation energy

• Lowering the energy of the reactants

Which of the following is correct?

• Exergonic reactions release energy

• Exergonic reactions absorb energy

• Endergonic reactions release energy

• Endergonic reactions have more energy in the reactants

In the forming of nonpolar covalent bonds there is

• Donation of electrons

• Unequal sharing of electrons

• Equal sharing of protons and electrons

• Equal sharing of electrons

For a dissacharide to form from two monosacharides

• The presence of cations and anions form the bond

• A disassembling of molecules by hydrolysis must occur

• The removal of water must occur

• The addition of water must occur

A polysaccharide that is formed in liver and muscle cells is

• Starch

• Cellulose

• Sucrose

• Glycogen

A fatty acid that contains 3 double bonds would be

• Saturated

• Unsaturated

• Carboxylated

• Methylated

Proteins do all of the following except

• Antibodies

• Transport

• Receptors

• Storage

The 20 amino acids differ from each other in the

• Number of central carbon atoms

• Size of the amino group

• Nature of the R group

• Number of carboxyl groups

Molecules that store genetic information are

• Proteins

• Nucleic acids

• Carbohydrates

• Lipids