Unit 1: Biochemistry

Which is NOT a characteristic of all living things?

• Universal genetic code (DNA)

• Ability to move

• Made of cells

• Obtain materials and use energy

• None of the above

Which is NOT a characteristic of living things?

• Ability to reproduce

• Ability to grow and develop

• Maintain a stable internal condition

• Change over time (evolution)

• None of the above

What are the three subatomic particles of an atom?

• protons, electrons, neutrons

• protons, photons, neutrons

• electrons, neutrons, photons

• photons, lightrons, introns

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

• protons, electrons, and neutrons

• electrons and protons

• protons and neutrons

• neutrons and electrons

What is the atomic number of chlorine

• 17

• 35

• 52

• 18

How many electrons does chlorine contain?

• 17

• 35

• 52

• 18

If chlorine has 17 protons, how many neutrons would it have?

• 17

• 35

• 52

• 18

This is a type of bond in which atoms share electrons

• ionic

• hydrogen

• polar

• covalent

This is a type of bond in which one atom gains an electron while the other atom loses an electron

• ionic

• hydrogen

• polar

• covalent

An ionic bond is formed when sodium (Na) loses an electron to chlorine (Cl). In this case the Na ion would carry what type of charge

• -1

• -2

• +1

• +2