stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
BJU Biology Chapter 2 Test (5th Ed.) Flashcards | StudBud
Explore
/
BJU Biology Chapter 2 Test (5th Ed.)
BJU Biology Chapter 2 Test (5th Ed.)
70 terms
·
StudBud Administration
·
61 plays
Questions from BJU Chapter 2 (5th Edition).
Flashcards
70 cards
F
Practice quiz
P
Host live
L
Questions
70
Answers
1
A base forms hydrogen ions in a solution.
false
true
2
What is the smallest individual part of an element?
molecule
atom
matter
compound
3
An atom is classified by the number of protons in its nucleus.
true
false
4
Chemistry is the study of matter and the changes it experiences.
true
false
5
Proteins are organic polymers consisting of chains of
nucleotides.
R groups.
amino acids.
simple sugars.
6
In a solution, the substance that does the dissolving is called the solute.
true
false
7
Which reaction would be best helped by a catalyst?
2
3
4
1
8
Which reaction has reactants with the lowest energy content?
1
3
4
2
9
What is a pure substance made of two or more chemically combined elements?
compound
none of these
molecule
atom
10
When a peptide bond forms between two amino acids, __________ is released.
glucose
water
an amine group
carbon dioxide
11
Which reaction(s) is (are) exothermic?
2
1
3
4
12
The physical stuff that makes up everything in the universe is known as
energy
elements
mass
matter
13
Sodium and chlorine chemically combine to form sodium chloride. What is (are) the reactant(s)?
sodium chloride
sodium
chlorine
14
Water reacts with many substances because it is a non polar molecule.
false
true
15
Electrons are the basic building blocks of matter.
true
false
16
Which of the following is
not
a smaller part of an atom?
proton
ion
electron
nucleus
17
Nucleotides hook together to form both
proteins and fats.
RNA and glucose.
DNA and proteins.
DNA and RNA.
18
Which of the following is
not
a reason why carbon is important for life?
Carbon can form graphite and diamonds.
Carbon atoms can form chains or rings.
Carbon can bond with itself.
Carbon can form up to four bonds.
19
What is the tendency of energy to spread out?
bonding
entropy
covalence
enzyme
20
Brownian motion is motion cause by the collisions between particles.
true
false
21
The main purpose of carbohydrates for living things is for
body coverings.
information.
fuel.
storage.
22
Decaying vegetation is an example of a physical change.
true
false
23
The attraction of one water molecule for another is known as
adhesion.
cohesion.
none of these.
polarity.
24
Temperature is the measure of the average speed at which particles move.
false
true
25
Is a carton of milk turning sour a physical or chemical change?
physical
chemical
26
Proteins are polymers made of amino acids connected by peptide bonds.
false
true
27
A substance that
decreases
the activity of an enzyme is a(n)
catalyst.
inhibitor.
substrate.
reducer.
28
A pure substance made of only one kind of atom is a(n)
neutron
chemical
element
ion
29
Which of the following is true about enzymes?
They are catalysts.
They lower the activation energy of a reaction.
They are large molecules.
All of these.
30
Which reaction releases the least energy?
2
4
1
3
31
What is a pure substance made of only one type of atom?
molecule
compound
element
none of these
32
A chemical equation shows both the reactions and the products.
true
false
33
What element(s) is (are) found in every carbohydrate?
carbon
all of these
oxygen
hydrogen
34
A compound held together by opposite electrical charges is a(n) _______________ compound.
covalent
electrical
ionic
molecular
35
Organic compounds all contain the element
carbon.
hydrogen.
oxygen.
nitrogen.
36
Is ice melting on a pond a physical or chemical change?
physical
chemical
37
Does this graph show and endothermic or exothermic reaction?
exothermic
endothermic
38
Is running a tree branch through a wood chipper a physical or chemical change?
physical
chemical
39
Is gasoline powering a car's engine a physical or chemical change?
physical
chemical
40
Which reaction releases the most energy?
3
4
1
2
41
All organic compounds contain carbon.
true
false
42
The interaction between hydrogen atoms on adjacent molecules is known as
hydrogen bonding
.
true
false
43
Temperature is a measurement of
how much energy an object has
the speed of moving particles
the amount of energy store in chemicals
the amount of matter in an object
44
Nucleic acids contain instructions that cells use to build proteins.
true
false
45
Ionic bonds are formed when atoms
gain electrons
both A and B
lose electrons
share electrons
46
Which of the following is
not
a part of a molecule
nitrogenous base
phosphate group
R group
sugar
47
Covalent compounds form when atoms ____________ electrons.
lose
exchange
gain
share
48
What are the main kinds of organic molecules found in living things?
lipids and proteins
Neither A nor B
Both A and B
carboydrates and nucleotides
49
Catalysts increase the amount of activation energy necessary for a reaction.
false
true
50
Endothermic reactions yield products with more energy that that contained in the reactants.
false
true
51
Which of the following is not a molecule?
water (H2O)
nitrogen (N2)
DNA
magnesium (Mg)
52
What is the smallest part of a covalent compound?
molecule
element
compound
atom
53
The most significant element for living things is oxygen.
true
false
54
The molecule that fits the active site of an enzyme is known as an activator.
true
false
55
Which reaction(s) is (are) endothermic?
2
4
1
3
56
Photosynthesis is an example of a physical change (plants use sunlight and CO
2
to make glucose)
false
true
57
Lipids include
nucleotides.
amino acids.
fats.
sugars.
58
Unsaturated fats contain only single bonds.
false
true
59
Is crumpling a piece of paper a physical or chemical change?
chemical
physical
60
Which reaction diagram shows the most activation energy?
1
4
2
3
61
Glucose and sucrose are examples of lipids.
false
true
62
An ion is
either A or B
an atom with more protons than electrons
an atom with more electrons than protons
neither A nor B
63
Which reaction diagram show the least activation energy?
4
1
2
3
64
Dissolving is the process by which one substance breaks another substance into smaller pieces.
true
false
65
What is a substance that produces hydroxide ions in solution?
molecule
acid
base
compound
66
Bonds between atoms store chemical energy.
false
true
67
What is a substance that produces hydrogen ions in solution?
entropy
base
acid
moelcule
68
Seawater is a solution of water, mineral, and gases. What are the solutes in the solution?
water
minerals
gases
seawater
69
In an exothermic reaction, the products have _____________ than the reactants.
less energy
the same amount of energy
none of these
more energy
70
The outermost electrons in an atom are called valence electrons.
false
true
