The Chemistry of Life Review

What are the 6 most common elements in biological molecules?

• Nitrogen, carbon, helium, oxygen, phosphorus, sulfur

• Neon, carbon, helium, oxygen, phosphorus, sodium

• Nitrogen, calcium, hydrogen, oxygen, potassium, sulfur

• Nitrogen, carbon, hydrogen, oxygen, phosphorus, sulfur

This is made when atoms are formed by covalent bonds

• Element

• Compound

• Ion

• Molecule

___________ are atoms that lose or gain an electron.

• Element

• Compound

• Ion

• Molecule

Type of bond formed when electrons are shared between two atoms

• Covalent Bond

• Ionic Bond

• Hydrogen Bond

What is the basic unit of matter?

• compound 
• atom
• molecule
• macromolecule 

A substance that cannot be broken down into a simpler substance is called a(an)

• carbohydrate
• protein
• element
• isotope

Where are the electrons found in an atom?

• inside the nucleus
• outside the nucleus
• next to the  protons
• there are no electrons in an atom

What are enzymes used for? 

• speed up chemical reactions 
• store energy 
• fight off infections 
• structural support for cell walls of plants 

Neutrons and protons make up the atom's ________.

• nucleus
• electrons
• solvent 
• solution

Which is an example of a nucleic acid?

• sucrose & lactose 
• hormones & antibodies 
• DNA & RNA
• steroids