evenly distributed mixture of two or more substances

Which statement is true?

RNA molecules are made of nucleotides

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

studbud

Duplicate of Biology Ch 2 Miller & Levine

30 termsStudBud Administration308 plays

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

Flashcards30 cardsFPractice quizPHost liveL

Questions 30

Answers

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

Duplicate of Biology Ch 2 Miller & Levine Flashcards | StudBud