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WorksheetsBiochemistry Review S138
Total questions: 47
Worksheet time: 36mins
Name
Class
Date
1.
Which of the following word pairs correctly completes the sentence below?
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.
a)
Acids; pH less than 7
b)
Acids; pH greater than 7
c)
Bases; pH greater than 7
d)
Bases; pH less than 7
2.
What is the range of pH values in an acidic solution?
a)
0-6.9
b)
7.1-14
c)
10-1,000
d)
pH = 7
3.
A solution with a pH of 7 is________
a)
increasing
b)
neutral
c)
decreasing
d)
apple juice
4.
Which of the following is true about acids and bases?
a)
The lower the pH, the stronger the acid
b)
the higher the pH, the stronger the acid
c)
The lower the pH, the more neutral the acid
d)
The higher the pH, the weaker the base
5.
Which type of ion does a base produce when it is dissolved in water?
a)
oxide
b)
oxygen
c)
hydrogen
d)
hydroxide
6.
This is one way to show a neutral substance:
a)
[H+]=[OH-]
b)
[H+]~~[OH-]
c)
[H+]<[OH-]
d)
[H+]>[OH-]
7.
What is the role of a biological buffer?
a)
Neutralizes a solution when acid or base is added
b)
Adds hyroxide ions to a solution
c)
Resists changes in pH due to addition of acid or base
d)
Combines hydroxide ions and hydrogen ions to form water
8.
What is the pH of water?
a)
0
b)
4
c)
7
d)
14
9.
When dissolved in water, acids produce:
a)
bases
b)
salts
c)
hydrogen ions
d)
hydroxide ions
10.
Bases are what range on the pH scale?
a)
0-6.99
b)
7
c)
7.1-14
d)
0-14
11.
How does a solution of pH 5 compare to a solution of pH 3?
a)
pH 3 has 1000x more hydrogen ions than pH 5
b)
pH 3 has 100x more hydrogen ions than pH 5
c)
pH 3 has 1000x more hydroxide ions than pH 5
d)
pH 3 has 100x more hydroxide ions than pH 5
12.
Water is a ____________ molecule and will not dissolve ___________ molecules such as lipids
a)
polar, nonpolar
b)
nonpolar, polar
c)
covalent, ionic
d)
ionic, covalent
13.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
14.
Which characteristic of water will allow a paperclip to remain floating on water when the paperclip is gently placed on top of the water?
a)
adhesion
b)
surface tension
c)
solvent properties
d)
nonpolar
15.
Water's tendency to stick to itself is called...
a)
cohesion
b)
adhesion
c)
surface tension
d)
capillary action
16.
The fact that ice floats on liquid water is due to the fact that water's solid is ___________ than it's liquid form
a)
less polar
b)
more polar
c)
less dense
d)
more dense
17.
molecule in which opposite ends have opposite electric charges
a)
cohesion
b)
polar molecule
c)
hydrogen bond
d)
solution
18.
Why does water move from the roots to the leaves of plants?
a)
Water is pushed by solutes
b)
Capillary action pulls the water molecules like a chain
c)
Water is pulled by gravity
d)
Water’s cohesion causes it to “pull” towards the leaves
19.
Attractions between water molecules are called
a)
Covalent bonds
b)
Ionic bonds
c)
Polar bonds
d)
Hydrogen bonds
20.
Water is polar because...
a)
The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.
b)
The molecule has two poles, at which the it is colder than other regions of the molecule.
c)
The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.
d)
The water molecule is neutral.
21.
Most of water's unique properties are due to...
a)
It's ability to to dissociate into ions
b)
It's ability to form hydrogen bonds
c)
it's ability to to form ionic bonds
d)
It's non-polar structure
22.
Proteins are made of monomers called ___________
a)
Nucleotides
b)
Monosaccharides
c)
Amino Acids
d)
Glycerol and fatty acids
23.
The element _______is found in all of the organic compounds.
a)
Iron
b)
Nitrogen
c)
Carbon
d)
Oxygen
24.
Monosaccharides are monomers of
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
25.
Glycerol and fatty acids are the monomers of
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
26.
The organic compounds that have many structural purposes and are used in many processes within the
cell are called ____________________.
cell are called ____________________.
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
27.
Which macromolecule is shown?
View Figure 1 (if not visible)
View Figure 1 (if not visible)
a)
lipid
b)
protein
c)
nucleic acid
d)
carbohydrate
28.
What type of macromolecule are enzymes?
a)
Protein
b)
Carbohydrate
c)
Lipid
d)
Nucleic Acid
29.
Which of the following organic compounds is the main source of energy for living things?
a)
carbohydrates
b)
lipids
c)
nucleic acids
d)
proteins
30.
Carbohydrates are made of...
a)
C H O
b)
C H O N
c)
C H O N P
d)
C H O N S
31.
Proteins are made of...
a)
C H O
b)
C H O N
c)
C H O N P
d)
C H O N S
32.
Which macromolecule stores energy, insulates us, and makes up the cell membrane?
a)
lipids
b)
proteins
c)
carbohydrates
d)
nucleic acids
33.
This is one job proteins do NOT have in the body
a)
insulation
b)
structure for tissues and organs
c)
speed up chemical reactions
d)
transport things through cell membrane
34.
Monomer is to Macrocolecule like ___ is to ____
a)
Building is to Bricks.
b)
Brick is to Building.
c)
Carpenter is to Building.
d)
Building is to Carpenter.
35.
Photosynthesis involves the production of sugar and oxygen. Select the drawing that shows a carbohydrate that is formed in photosynthesis.
a)
A
b)
B
c)
C
d)
D
36.
The following is a diagram of the product of protein synthesis. This protein is a chain of a certain molecule. The molecule labeled Z is most likely classified as
a)
Amino acid
b)
Polypeptide
c)
Glycerol
d)
Sugar
37.
Speed up chemical reactions, protects against infections, and structural component of hair, skin, and muscles
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
38.
When two monosaccharides are joined to make a disaccharide a ____________________ reaction occurs and water is _______________.
a)
hydrolysis; added
b)
hydrolysis; removed
c)
dehydration synthesis; added
d)
dehydration synthesis; removed
39.
The complex carbohydrates found in human livers and muscle cells is ________________.
a)
amylose
b)
cellulose
c)
glucose
d)
glycogen
40.
A triglyceride is made of?
a)
1 glycerol and 3 fatty acids
b)
3 glycerols and 1 fatty acid
c)
3 glucose molecules
d)
3 carbon rings
41.
In an amino acid a peptide bond forms between the ___________ and _______________ groups.
a)
carboxyl; amino
b)
radical; carboxy
c)
hydroxyl; radical
d)
all of these are possible
42.
What are ionic bonds?
a)
Valence electrons transferred between atoms
b)
Inner most electrons transferred between atoms
c)
Sharing electrons
43.
An electron has what kind of charge?
a)
no charge
b)
positive
c)
negative
d)
it depends
44.
How many bonds does a carbon atom form in an organic molecule?
a)
1
b)
2
c)
3
d)
4
45.
What bond involves the sharing of electrons?
a)
Ionic
b)
Transitive
c)
Covalent
46.
Atoms that gain electrons become...
a)
negatively charged
b)
positively charged
c)
remain neutrally charged
d)
21
47.
If an aluminum atom has 13 protons (+) and 10 electrons (-), what is it's charge?
a)
Al3+
b)
Al13+
c)
Al10+
d)
Al10-
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