Elements
Reactions
Macromolecules
Chemistry
100

This property of a water molecule allows hydrogen bonds to form among adjacent molecules.

What is polarity?

100

The rearrangement of electrons to break or form chemical bonds must ALWAYS occur as this proceeds.

What is a chemical reaction?

100

This type of macromolecule has the function of storing and transmitting hereditary or genetic information.

What is a nucleic acid?

100

If something has a pH above 7 it is considered to be this. 

What is basic?

200

The gain or loss of one or more electrons changes an atom to this.

What is an ion?

200
This decreases the activation energy in a chemical reaction. 

What is an enzyme?

200

A long chain made of only carbon and hydrogen atoms can only be found in this type of macromolecule.

What is a lipid?

200

These prevent small amounts of an acid or base from changing the pH of blood.

What is buffers?

300

These type of bonds, formed by shared electrons between atoms, allow the three atoms in a water molecule to stay together. 

What are covalent bonds?

300
These two types of particles are present in equal numbers in an atom, but not in an ion. 

What is protons and electrons?

300
This is one of the main functions of a lipid in an organism.

What is a waterproof covering?

300

A compound often has very _______________ characteristics than that of the elements which make it up. 

What is different?

400

In this space in the center of the atom, protons and neutrons are found.

What is a nucleus?

400

Two amino acids unite by forming this type of bond and releasing a molecule of water in the reaction.

What is a peptide bond?

400

Lipid molecules are ____________ because they repel water molecules, which are polar.

What is nonpolar?

400
This is a type of polymer made up of glucose monomers. 

What is starch?

500

In this, the number of protons equals the number of electrons but there is a different number of neutrons. 

What is an isotope?

500

Amino acids are joined by these two functional groups.

What is an amino group and a carboxyl group?

500

When looking at the structure of an amino acid, this group determines differences among types of amino acids.

What is the -R group?

500

Carbonic anhydrase decreases this and changes the reaction between carbon dioxide and water.

What is activation energy?

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