Which statement is true?

RNA molecules are made of nucleotides

evenly distributed mixture of two or more substances

Mass number is defined as

the sum of protons and neutrons

Changing the pH of a solution from 7.0 to 4.0

results in a 1000x increase in hydrogen ion concentration

Water is a polar molecule because

there is an uneven dist. of electrons between O and H atoms

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Miller & Levine Ch. 2 #1 v.9/2019

30 termsStudBud Administration168 plays

Quiz corresponds to Ch 2 of the Prentice Hall Biology text by Miller & Levine (dragonfly edition)

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Questions 30

Answers

1
A covalent bond is formed as the result of
transferring electrons
transferring protons
sharing a proton pair
sharing an electron pair
2
Which element is NOT considered essential to life?
carbon
nitrogen
phosphorous
helium
3
An atom of magnesium (atomic number 12) with a mass number of 24 has how many neutrons?
10
12
13
11
4
Chemical reactions that release energy
will not occur
often occur spontaneously
will always explode
will always absorb energy
5
Of the following what is NOT a nucleotide of nucleic acids?
Guanine
Adenine
Cytosine
Promine
6
The study of the chemistry of living things is called
analytical chemistry
biochemistry
physical chemistry
biogeochemistry
7
What is the term used to describe the energy needed to get a reaction started?
activation energy
cohesion energy
adhesion energy
chemical energy
8
Which statement is true?
Amino acids are made of proteins
Glycerol is made of fatty acids
RNA molecules are made of nucleotides
Simple sugars are made of polysaccharides
9
When salt is dissolved in water, water is the
solute
solvent
solution
reactant
10
A solution is a(an)
evenly distributed mixture of two or more substances
chemical reaction
breaking of a chemical bond
combination of two or more solids
11
A monosaccharide is a
protein
nucleic acid
carbohydrate
lipid
12
Of the following acidic substances which is the weakest acid?
sulfuric acid (pH 1.2)
hydrochloric acid (pH 1.0)
tomatoes (pH 4.2)
rainwater (pH 6.2)
13
Which of the following is NOT a function of proteins?
store and transmit heredity
control the rate of reactions and regulate cell processes
build tissues such as bone and muscle
help to fight disease
14
The monomer of nucleic acids are referred to as
Laurentides
Neutratides
Nucleotides
Electrotides
15
The structure of lipids include
glycerol and lean acids
glycerol and fatty acids
glycerine and fatty acids
glycine and fatty acids
16
Mass number is defined as
the sum of electrons and protons
the sum of protons and neutrons
the sum of neutrons and electrons
the sum of electrons and protons
17
In a chemical reaction, a reactant binds to an enzyme at a region known as the
catalyst
active site
product
substrate
18
Enzymes affect the reactions in living cells by changing the
temperature of the reaction
speed of the reaction
pH of the reaction
products of the reaction
19
Enzymes can be regulated by all of the following EXCEPT
changes in temperature
other proteins
changes in pH
changes in density
20
Water that will not stick to a newly waxed automobile is due to
prohesion
adhesion
coenzyme action
capillary action
21
Isotopes are atoms of the same element with the same number of protons and
a different number of neutrons
a different number of molecules
the same number of neutrons
a different number of electrons
22
What type of ion forms when an atom loses electrons?
negative
possibly positive or negative
neutral
positive
23
Changing the pH of a solution from 7.0 to 4.0
results in a 1000x decrease in hydrogen ion concentration
results in a 100x increase in hydrogen ion concentration
results in a 100x decrease in the hydrogen ion concentration
results in a 1000x increase in hydrogen ion concentration
24
What type of electrons are available to form bonds?
ionic
valence
covalent
nucleus
25
The space surrounding the nucleus of an atom contains
neutrons
electrons
protons
ions
26
Ice floats on water because
of prohesion
water shrinks when it freezes
water expands when it freezes
ice has a higher density than water
27
Water is a polar molecule because
there is an uneven dist. of electrons between H atoms only
there is an even dist. of electrons between O and H atoms
there is an uneven dist. of electrons between O and H atoms
there is an uneven dist. of electrons between O atoms only
28
These biological molecules are used for long term energy storage
Carbohydrates
Proteins
Nucleic Acids
Lipids
29
What term describes a substance formed by two or more elements in definite proportions?
isotope
compound
enzyme
nucleus
30
The ability of water to stick to itself is called
adhesion
cohesion
collation
prohesion

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