Biology Quiz on Macromolecules and Enzymes

Which elements are found in carbohydrates?

• C, H, O

• C, H, N

• C, H, O, N

• C, H, O, N, P

What elements are present in lipids?

• C, H, O

• C, H, N

• C, H, O, N

• C, H, O, N, P

How does adding more substrate affect an enzyme reaction?

• Decreases reaction rate

• Increases reaction rate and then remains constant

• Stops the reaction

• Has no effect

Which macromolecule is not a source of energy?

• Carbohydrates

• Lipids

• Proteins

• Nucleic acids

What is the main function of lipids in the body?

• Catalyze reactions

• Store energy

• Provide genetic information

• Form cell walls

Which element is common to all macromolecules?

• Nitrogen

• Phosphorus

• Carbon

• Sulfur

What is the optimum pH for Pepsin?

• pH 2

• pH 6

• pH 9

• pH 7

What is the optimum pH for Salivary Amylase?

• pH 2

• pH 6

• pH 9

• pH 5

What property of water allows insects to walk on it?

• High density

• Cohesion and surface tension

• Low boiling point

• High pH

Why does ice float on water?

• Ice is denser than water.

• Ice is less dense than water.

• Ice has a higher pH.

• Ice has a lower pH.