Matter & Energy
All of the following are states of matter EXCEPT
______.
a. energy
b. liquid
c. gas
d. solid
a. energy
Which of the following is NOT one of the four
major elements in the human body?
a. Hydrogen
b. Calcium
c. Nitrogen
d. Oxygen
b. Calcium
Which of the following is NOT a compound?
a. H2O
b. NaCl
c. O2
d. C6H12O6
c. O2
Building muscle tissue is an example of which
type of reaction?
a. Synthesis
b. Exchange
c. Decomposition
d. Catabolic
a. Synthesis
A steroid is an example of _________.
a. an inorganic compound
b. a lipid
c. a protein
d. a sugar
b. a lipid
Substances that CANNOT be broken down into
simpler substances are defined as ________.
a. matter
b. compounds
c. elements
d. protons
c. elements
The atomic number is always equal to the
number of _______ in an atom.
a. protons
b. electrons
c. neutrons
d. protons and neutrons
a. protons
The following are electrons in the electron shells
of four atoms. Which atom would most likely be
reactive?
a. 2
b. 2, 8
c. 2, 8, 7
d. 2, 8, 8
c. 2, 8, 7
All of the following affect the rate of a reaction
EXCEPT __________.
a. temperature
b. the concentration of reactants
c. particle size
d. density
d. density
Which of the following is NOT a function of
water?
a. Body temperature regulation
b. Source of electrolytes
c. Universal solvent
d. Protection from mechanical damage
b. Source of electrolytes
Energy in action is defined as _______ energy.
a. chemical
b. kinetic
c. potential
d. ATP
b. kinetic
Isotopes have the same number of _______ but
differ in the number of ________.
a. protons; electrons
b. protons; neutrons
c. electrons; neutrons
d. neutrons; protons
b. protons; neutrons
An ionic bond is formed between _______.
a. two inert atoms
b. two cations
c. two anions
d. a cation and an anion
d. a cation and an anion
Bonds are broken during which type of reaction?
a. Catabolic
b. Anabolic
c. Synthesis
d. Endergonic
a. Catabolic
Which pH indicates a weak base?
a. 2.0
b. 6.8
c. 7.4
d. 11.0
c. 7.4
When you row a boat, your arms provide which
type of energy?
a. Chemical
b. Potential
c. Mechanical
d. Electrical
c. Mechanical
If an atom gains an electron, the resulting charge
of that atom is more _________.
a. positive
b. negative
c. neutral
d. It varies from atom to atom.
b. negative
Which type of bond is formed when electrons are
shared unequally between atoms?
a. Polar covalent
b. Nonpolar covalent
c. Ionic
d. Hydrogen
a. Polar covalent
An enzyme is an example of a _________.
a. reactant
b. solute
c. catalyst
d. reaction
c. catalyst
Which of the following describes the tertiary structure of
proteins?
a. Twisting and bending to form a more complex
structure, such as a helix
b. Two or more polypeptide chains aggregated to form
a complex protein
c. The linear sequence of amino acids
d. α-helical or β-pleated regions of the
polypeptide chain folded upon one
another
d. α-helical or β-pleated regions of the polypeptide
chain folded upon one another
When energy is converted from one form to
another, some of the original energy is “lost” as
________.
a. heat
b. water
c. mechanical energy
d. electrons
a. heat
Which spontaneously decompose into more
stable atoms?
a. Radioisotopes
b. Elements
c. Isotopes
d. Colloids
a. Radioisotopes
Which of the following statements is true of
solvents?
a. They are usually solids.
b. They are present in smaller amounts in a
solution.
c. Water is the main solvent in the body.
d. They are tiny particles.
c. Water is the main solvent in the body.
Which of the following is NOT a reason for the
irreversibility of chemical reactions in cells?
a. Chemical reactions that release energy would require
energy to be reversed.
b. A product might be continually removed from the
reaction site.
c. Biological reactions can proceed only in a single
direction.
d. A product might be expelled from the
body.
c. Biological reactions can proceed only in a single
direction.
$500 Question
A substance that dissociates into cations and
hydroxyl ions is __________.
a. an acid
b. a base
c. a salt
d. an electrolyte
b. a base
Which substance is the primary energy-
transferring molecule in the cell?
a. Glucose
b. Fat
c. Protein
d. ATP
d. ATP