The reactant in a redox reaction that readily donates electrons is called a/an:
reducing agent
coenzyme
dehydrogenase
redox agent
A redox reaction can easily be explained as:
an attraction between opposite charges
transferring electrons between reactants
forming a bond by sharing electrons
the breakdown of glucose in cells
Hydrogen bonds occur between hydrogen in one polar molecule and _____ in another polar molecule. I. Oxygen II. Fluorine III. Nitrogen
II only
I, II, and III
III only
I and II only
A hydrogen bond is _____.
an intramolecular force
an intermolecular force
a perimolecular force
a paramolecular force
A polar molecule, such as the one involved in a hydrogen bond, is sometimes called _____.
a dipole
simply, hydrogen
a covalent bond
a tripole
Which of the following properties helps explain why a city near the Pacific Ocean experiences less dramatic changes in temperature during the day compared to a city farther inland?
Water has a high specific heat.
Water has a low specific heat.
Water forms covalent bonds
Water has high surface tension.
Water's ability to move against gravity in a narrow space, such as a tube, is called:
Osmosis.
Capillary action.
Cohesion.
Hydrogen bonding.
Why is solid water (ice) less dense than liquid water?
The hydrogen bonds between water molecules are spaced out.
It is actually more dense.
Liquid water does not form hydrogen bonds.
Hydrogen bonds are not able to be formed.
If only one type of atom makes up a substance, what can you call this substance?
an element
a proton
a compound
a neutron
Particles that are found in the atomic nucleus are:
Protons, neutrons and electrons
Neutrons and electrons
Protons and neutrons
Protons and electrons
What does the atomic number represent?
number of protons
total number of protons and neutrons
number of neutrons
total number of electrons and protons combined
Lactose is composed of a glucose molecule and a galactose molecule, therefore, lactose is classified as a _____.
monosaccharide
disaccharide
polysaccharide
trisaccharide
When a protein makes it easier for a biological reaction to happen, it is acting as _____.
a messenger
an enzyme
a structural protein
a transporter
