Intro to Biology

What is the purpose of lab safety rules?

• To make the lab environment more fun and exciting.

• To increase the chances of accidents in the laboratory.

• To encourage reckless behavior in the lab.

• To ensure safety and prevent accidents in the laboratory.

Which of the following is a living organism?

• None of the options are living organisms.

• Only one of the options is a living organism.

• Some of the options are living organisms.

• All of the options are living organisms.

What is the chemical formula for water?

• O2H

• H3O

• HO2

• H2O

What property of water allows it to stick to other substances?

• evaporation

• repulsion

• cohesion

• adhesion

Which macromolecule is the main source of energy for living organisms?

• carbohydrates

• nucleic acids

• lipids

• proteins

What is the function of enzymes in biological reactions?

• Enzymes provide energy for biological reactions.

• Enzymes inhibit biological reactions.

• Enzymes regulate the pH of biological reactions.

• Enzymes act as catalysts in biological reactions.

Which of the following is NOT a property of water?

• Density of water decreases as it freezes

• Water is a nonpolar molecule.

• Water has a high boiling point.

• Water is a good solvent.

Which macromolecule is responsible for storing genetic information?

• RNA

• DNA

• Protein

• Carbohydrate

What is the building block of proteins?

• amino acids

• nucleic acids

• lipids

• carbohydrates

What is the optimal pH range for most enzymes to function properly?

• pH 5 to pH 7

• pH 6 to pH 8

• pH 10 to pH 12

• pH 2 to pH 4