Anatomy- The Chemistry of Life

Multiple Choice

Why is understanding chemistry important for studying living organisms?

• Because it helps explain how living things function at a molecular level

• Because it only deals with non-living things

• Because chemistry is unrelated to biology

• Because it is only needed for laboratory experiments

Multiple Choice

Which subatomic particles are found in the nucleus of an atom?

• Protons and neutrons

• Electrons and protons

• Neutrons and electrons

• Only protons

Multiple Choice

Which four elements make up about 90% of the mass of living organisms?

• Carbon, oxygen, hydrogen, and nitrogen

• Carbon, calcium, sodium, and iron

• Oxygen, magnesium, phosphorus, and zinc

• Hydrogen, iron, sodium, and calcium

Multiple Choice

Which of the following statements about isotopes is correct?

• Isotopes have the same number of protons but different numbers of neutrons.

• Isotopes have different numbers of protons and neutrons.

• Isotopes have the same number of neutrons but different numbers of protons.

• Isotopes have different charges.

Multiple Choice

Which of the following statements correctly describes the difference between Carbon-12, Carbon-13, and Carbon-14?

• They have different numbers of neutrons.

• They have different numbers of protons.

• They have different numbers of electrons.

• They are different elements.

Multiple Select

Which of the following are practical uses of radioactive isotopes?

• Determining the age of rocks and fossils

• Curing cancer

• Killing bacteria that cause food spoilage

• Making water safer to drink

Multiple Choice

Which of the following statements about compounds is correct?

• A compound has different properties from the elements that compose it.

• A compound is made of only one element.

• A compound always has the same properties as its elements.

• A compound cannot be broken down into simpler substances.

Multiple Choice

What holds the atoms together in a compound?

• Chemical bonds

• Protons

• Neutrons

• Nuclear forces

Multiple Choice

What are the two main types of chemical bonds?

• Ionic bonds and covalent bonds

• Hydrogen bonds and metallic bonds

• Van der Waals forces and ionic bonds

• Covalent bonds and metallic bonds

Multiple Select

Which of the following statements are true about ionic bonds?

• Ionic bonds are formed when electrons are transferred from one atom to another.

• Ions of opposite charges are attracted to each other in ionic bonds.

• Ionic bonds involve the sharing of electrons between atoms.

• Ionic bonds only occur between nonmetals.

Multiple Choice

What causes a molecule to be polar?

• Unequal sharing of electrons between atoms

• Equal sharing of electrons between atoms

• Presence of only one type of atom

• Absence of covalent bonds

Multiple Choice

In a water molecule, which atom has a stronger attraction for the shared electrons?

• Oxygen

• Hydrogen

• Both equally

• Neither

Multiple Select

Which of the following statements about hydrogen bonding in water are correct?

• Hydrogen bonds form between the hydrogen atom of one water molecule and the oxygen atom of another.

• Hydrogen bonds are responsible for the cohesion of water molecules.

• Hydrogen bonds occur within a single water molecule.

• Hydrogen bonds are stronger than covalent bonds.