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