A&P Test 2

What is a dipole?
a type of reaction
an organic molecule
a polar molecule
a type of bond

a polar molecule

You notice that you cannot read your book through a test tube of patient fluid held against the print, making it so blurred as to be unreadable.There is no precipitant in the bottom of the beaker, though it has been sitting for several days in a rack. Wha

colloid

If atom X has an atomic number of 74 it would have which of the following?
37 electrons
37 protons and 37 neutrons
37 protons and 37 electrons
74 protons

74 protons

The chemical symbol O=O means ________.
this is an ionic bond with two shared electrons
both atoms are bonded and have zero electrons in the
outer orbit
zero equals zero
the atoms are double bonded

the atoms are double bonded

Which statement about enzymes is false?
Enzymes may use coenzymes derived from vitamins or cofactors from metallic elements.
Enzymes have the ability to accelerate reactions as much as a billion-folD.
Enzymes require contact with substrate in order to ass

Enzymes require contact with substrate in order to assume their active form

Which property of water is demonstrated when we sweat?
high heat of vaporization
cushioning
reactivity
polar solvent properties
high heat capacity

high heat of vaporization

Which protein types are vitally important to cell function in all types of stressful circumstances?
structural proteins
molecular chaperones
regulatory proteins
catalytic proteins

molecular chaperones

The single most abundant protein in the body is ________.
DNA
glucose
hemoglobin
collagen

collagen

An atom with a valence of 3 may have a total of ________ electrons.
3
17
8
13

13

________ is fat soluble, produced in the skin on exposure to UV radiation, and necessary for normal bone growth and function.
Vitamin K
Vitamin D
Vitamin A
Cortisol

Vitamin D

Which of the following statements is false?
Larger particles move faster than smaller ones and thus collide more frequently and more forcefully.
Chemical reactions proceed more quickly at higher temperatures.
Chemical reactions progress at a faster rate w

Larger particles move faster than smaller ones and thus collide more frequently and more forcefully.

Salts are always ________.
double covalent compounds
hydrogen bonded
ionic compounds
single covalent compounds

ionic compounds

In general, the lipids that we refer to as oils have ________.
long fatty acid chains
a high degree of saturated bonds
a high water content
a high degree of unsaturated bonds

a high degree of unsaturated bonds

In a DNA molecule, the phosphate serves ________.
as nucleotides
to bind the sugars to their bases
as a code
to hold the molecular backbone together

to hold the molecular backbone together

What is the ratio of fatty acids to glycerol in neutral fats?

3:1

What does the formula C6H12O6 mean?
There are 6 carbon, 12 hydrogen, and 6 oxygen atoms.
The molecular weight is 24.
There are 6 calcium, 12 hydrogen, and 6 oxygen atoms.
The substance is a colloiD.

There are 6 carbon, 12 hydrogen, and 6 oxygen atoms

The genetic information is coded in DNA by the ________.
three-dimensional structure of the double helix
regular alteration of sugar and phosphate molecules
arrangement of the histones
sequence of the nucleotides

sequence of the nucleotides

Which of the following is not true of proteins?
They have both functional and structural roles in the body.
They appear to be the molecular carriers of coded hereditary information.
They may be denatured or coagulated by heat or acidity.
Their function de

They appear to be molecular carriers of coded hereditary information

Which of the following is a neutralization reaction?
NH3 + H+ > NH4+2
HCl + NaOH > NaCl + H2O
NaOH > Na+ + OH-
HCl > H+ + Cl-

HCl + NaOH > NaCl + H2O

What happens in redox reactions?
the organic substance that loses hydrogen is usually reduced
the reaction is uniformly reversible
both decomposition and electron exchange occur
the electron acceptor is oxidized

both decomposition and electron exchange occur

What is a chain of more than 50 amino acids called?
polysaccharide
protein
nucleic acid
polypeptide

protein

Which of the following is not a role of molecular chaperones?
prevent accidental, premature, or incorrect folding of polypeptide chains
act as a platform for assembling primary protein structure
promote the breakdown of damaged or denatured proteins
aid t

act as a platform for assembling primary protein structure

Which of the following does not describe uses for the ATP molecule?
transport across membranes
pigment structure
mechanical work
chemical work

pigment structure

Which of the following is not considered a factor in influencing a reaction rate?
concentration
particle size
time
temperature

time

Select the correct statement about isotopes.
Isotopes of the same element have the same atomic number but differ in their atomic masses.
Isotopes occur only in the heavier elements.
All the isotopes of an element are radioactive.
All the isotopes of an el

Isotopes of the same element have the same atomic number but differ in their atomic masses.

Atom X has 17 protons.How many electrons are in its valence shell?
3
5
10
7

7

Which of the following statements is false?
The pH of blood is slightly basiC.
The more hydrogen ions in a solution, the more acidic the solution.
When the hydrogen ion concentration decreases, the hydroxyl ion concentration also decreases.
When acids and

When the hydrogen ion concentration decreases, the hydroxyl ion concentration also decreases.

A chemical reaction in which bonds are broken is usually associated with ________.
a synthesis
the consumption of energy
the release of energy
forming a larger molecule

the release of energy

Carbohydrates and proteins are built up from their basic building blocks by the ________.
removal of a carbon atom between each two units
removal of a water molecule between each two units
addition of a water molecule between each two units
addition of a

removal of a water molecule between each two units

Which of the following would be regarded as an organic molecule?
NaOH
H2O
CH4
NaCl

CH4