Biology Book: Chapter 2 - The Chemistry of Life

What is the basic unit of matter?

• Molecule

• Atom

• Electron

• Nucleus

What is the control center of a eukaryotic cell?

• Electron

• Atom

• Nucleus

• Molecule

What is a pure substance?

• Mixture

• Element

• Compound

• Solution

What is a form of a chemical element with the same number of protons?

• Isotope

• Ion

• Molecule

• Compound

What type of bond involves the sharing of electrons between atoms?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Van Der Waals Forces

What are Van Der Waals Forces?

• Strong chemical bonds

• Weak attractions and repulsions between molecules

• Ionic bonds

• Covalent bonds

What is the attraction between molecules of the same substance called?

• Adhesion

• Cohesion

• Van Der Waals Forces

• Ionic bond

What is a product of mixing called?

• Solution

• Mixture

• Compound

• Element

What is a solution?

• A substance that is dissolved in a solution

• An answer to a problem

• A measure of acidity

• A type of nutrient

What is a base?

• A solution with a pH of less than 7

• A solution with a pH more than 7

• A type of carbohydrate

• A lipid