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Multiple Choice Quiz
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1
The smallest particle that cannot be subdivided into smaller substances without losing the properties of an element is termed a(an)
A)atom.
B)electron.
C)neutron.
D)compound.
2
Protons
A)are negatively charged.
B)orbit the nucleus of the atom.
C)are found in the atomic nucleus.
D)are the smallest of the subatomic particles.
3
A(an) ___________ has a characteristic atomic structure and predictable chemical behavior.
A)neutron
B)electron
C)element
D)compound
4
___________ are forms of an element that have different numbers of neutrons.
A)Isotopes
B)Isomers
C)Compounds
D)Molecules
5
The valence of an element determines
A)the number of electrons in its inner shell.
B)the number of covalent bonds it can make.
C)the atomic number.
D)the number of neutrons and protons in its nucleus.
6
Identify the compound from the following list:
A)14C
B)O2
C)Cl-1
D)H2O
7
A covalent bond
A)donates electrons to one partner.
B)transfers electrons from one partner to the other.
C)occurs between hydrogens of adjacent molecules.
D)shares electrons between partners.
8
When ionic bonds break and the atoms dissociate into unattached charged particles, this is called
A)ionization.
B)polarity.
C)reduction.
D)oxidation.
9
Select the decomposition reaction from the equations listed below:
A)A + B → AB
B)AB → A + B
C)A + BC → B + AC
D)AB + CD → AD + CB
10
If a salt were dissolved in a liquid, then the salt would be classified as the
A)solution.
B)solute.
C)solvent.
D)solid.
11
Benzene repels water, therefore benzene is considered to be
A)amphipathic.
B)hydrophilic.
C)hydrophobic.
D)acidic.
12
The molecular weight of NaCl is 58 grams per mole. A lab student dissolved 5.8 grams of NaCl and brought the solution to one liter with water. The solution would have a molarity of
A)0.1 M.
B)1.0 M.
C)5.8 M.
D)10 M.
13
A pH of 5 would be considered
A)acidic.
B)alkaline.
C)neutral.
D)basic.
14
__________ is an important molecule in biological systems because it is the building block of many polysaccharides, including starch, cellulose, and glycogen. It is the most common and universally important monosaccharide.
A)Triglyceride
B)Glucose
C)Glycerol
D)Sucrose
15
Polysaccharides are formed by linking monosaccharides into a macromolecule. What is the most common process that links each subunit together?
A)complexation reaction
B)saturation linkage
C)dehydration synthesis
D)hydrogen bonding
16
Identify the functional group that denotes an alcohol.
A)R–OH
B)R=R
C)R–NH2
D)R–COOH
17
The building blocks of proteins are
A)monosaccharides.
B)triglycerides.
C)amino acids.
D)nucleotides.
18
Which of the following would NOT be classified as a lipid?
A)triglyceride
B)steroid
C)wax
D)RNA
19
Membranes are
A)thin walls around cells
B)double-layers of phospholipids.
C)dual layers of amino acids
D)made up of waxes and sterols.
20
Organic molecules always contain
A)hydrogen and oxygen.
B)oxygen and carbon.
C)nitrogen and hydrogen.
D)hydrogen and carbon.
21
Amino acids always include the following functional groups EXCEPT
A)an alpha carbon.
B)a hydrogen.
C)an amino group.
D)a hydroxyl group.
22
What part of the DNA molecule is most exposed to the watery environment in the cell?
A)the flat, tightly stacked plates of the nucleotide bases
B)the ionically-charged phosphate groups in the "backbone"
C)the deoxyribose sugar alcohol groups in the "backbone"
D)the hydrogen-bonding links between nucleotides
23
RNA contains the following nitrogenous bases EXCEPT
A)cytosine
B)uracil
C)thymine
D)adenine
24
If DNA were a spiral staircase, the nitrogenous bases would be
A)the railings.
B)the wall.
C)the central support.
D)the steps.
25
The "primary" structure of a protein relates to the
A)nucleic acid sequence of the DNA.
B)messenger RNA.
C)sequence of amino acids.
D)way it folds.
26
An acid is a compound that releases H+1 ions when dissociating.
A)True
B)False
27
When a reaction generates heat, the reaction is termed endergonic.
A)True
B)False
28
The phenomenon in which electrons are transferred from molecule to another is termed a redox reaction.
A)True
B)False
29
Cholesterol adds strength to the cell membrane in animal cells.
A)True
B)False
30
Enzymes are lipids that function as catalysts.
A)True
B)False
31
All isotopes are radioactive
A)True
B)False
32
Ionic bonds are stronger than hydrogen bonds.
A)True
B)False





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