Download ( 2 points each).

Chem 60 Takehome Final Exam Student _____________________________________
Page 1 of 4
Multiple Choice. Choose the one alternative that best completes the statement or answers the question. (
2 points each).
1.
2.
3.
Which of the following is a nonmetal?
A) Aluminum B) Chlorine * C) Sodium
How long is 1 cm?
A) 1 mm
B) 10 mm * C) 100 mm
D) Magnesium
D) 0.01 mm
Which of the following is not a physical change?
A) Boiling water
B) Liquefying oxygen
C) Dissolving Kool-Aid
D) Frying an egg *
4.
Which of the following statements best describes a liquid?
A) Indefinite shape and volume
B) Definite shape and volume
C) Definite shape but indefinite volume
D) Indefinite shape but definite volume *
5.
All the different kinds of substances that make up all of the material of the universe are known collectively as
A) electrolytes
B) compounds
C) elements
D) matter *
6.
An atom of chlorine has how many valence electrons?
A) 2
B) 4
C) 7*
D) 6
7.
Almost all of the mass of an atom exists in its:
A) first energy level B) electrons
C) outermost energy level
8.
D) nucleus *
A bond where the electrons are shared equally is called a(n):
A) nonpolar covalent* B) polar covalent C) coordinate covalent
D) ionic
9.
Which of the following is an element?
A) Ammonia B) Sand C) Carbon dioxide D) Sodium *
10.
Which of the following is a mass unit?
A) mL
B) dm
C) cg*
D) yd
11.
A compound that is composed of only carbon and hydrogen is known as a(n):
A) isomer B)hydrocarbon *
C) carbohydrate D) homolog
12.
Which of the following molecules contains a chiral carbon?
A)
B)
C)
D)
*
Chem 60 Takehome Final Exam Student _____________________________________
13.
14.
The most abundant monosaccharide in nature is:
A) mannose B) glucose*
C) galactose
D) fructose
Which of the following is a polysaccharide?
A) Starch *
B) Maltose
C) Sucrose
D) Glucose
15.
A carbohydrate with a ketone functional group is called:
A) hexose
B) disaccharide C) ketose*
D)
aldose
16.
Lactose is made from D-glucose and:
A) glucose
B) ribose
C) galactose*
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D) mannose
17.
Which of the following is the structural polysaccharide in plants?
A) Amylose
B) Amylopectin C) Cellulose*
D) Glycogen
18.
Which of the following blood types is considered to be the universal blood donor?
A) Type A
B) Type O *
C) Type B
D) Type AB
19.
Oils are generally ____________ at room temperature and are obtained from ___________ .
A) solids; plants B) solids; animals
C) liquids; plants* D) liquids; animals
20.
The long hydrocarbon tails of soap molecules are:
A) hydrophobic and attracted to water
B) hydrophilic and attracted to water
C) hydrophobic and attracted to oils*
D) hydrophilic and attracted to oils
21.
A water solution of sodium chloride is a good conductor of electricity. Due to this property, table salt is classified
as a(n):
A) weak electrolyte B) strong electrolyte*
C) non-electrolyte
D) semi-electrolyte
22.
In order to prevent the process of either crenation or hemolysis with red blood cells an intravenous solution
concentration should be ________ to the concentration of blood.
A) hypotonic
B) hypertonic
C) isotonic*
D) all of these
23.
An Arrhenius acid is defined as a substance which:
A) acts as proton acceptor in any system
B) acts as proton donor in any system
C) decreases [H+] when placed in water
D) increases [H+] when placed in water*
24.
Which of the following does not represent a conjugate acid-base pair?
A) H3O+/H2O
B) HCN/CNC) HCl/Cl-
25.
In an acidic solution, pH is ________ and [H3O+] is ________.
A) = 7, 1 x 10-7 M
B) > 7, < 1 x 10-7 M
D) HC2H3O2/OH-*
Chem 60 Takehome Final Exam Student _____________________________________
C) < 7, > 1 x 10-7 M*
D) < 7, < 1 x 10-7 M
26.
Which of the following amino acids is an essential amino acid in the diets of children?
A) Arginine*
B) Lysine
C) Aspartate
D) Glycine
27.
The structure among the following that represents an amide (protein) bond is:
A)
B)
C)*
D)
28.
The sequence of amino acid is considered to be the ________ structure of a protein.
A) secondary
B) tertiary
C) quaternary
D) primary*
29.
Heavy metals such as Pb+2 or Hg+2 denature proteins by reacting with:
A) the proline residues
B) the OH group of tyrosine residues
C) the SH group of cysteine residues*
D) the NH2 group of glutamine
30.
Which of the following proteins has a distinctive Y-shape?
A) Hemoglobin
B) Collagen
C) Antibodies*
D) Integral protein
31.
Penicillin is an example of a(n):
A) reversible inhibitor
C) noncompetitive inhibitor
32.
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B) irreversible inhibitor *
D) activator
The optimum pH for an enzyme such as hexokinase that phosphorylates glucose in the blood would be:
A) 2.0
B) 9.0
C) 7.5 *
D) none of these
33.
What factors can influence the speed of a reaction by an enzyme?
A) The orientation of the reactants
B) The closeness of the reactants to each other in the active site
C) The weakening of bond energies in the reactants
D) All of the above *
34.
What is the primary function of enzymes?
A) Biochemical catalysts *
C) Structure
35.
The area on the enzyme that interacts with the substrate is called the:
A) allosteric site
B) regulatory site
C) active site*
D) modulator site
36.
The phosphodiester bond that forms between two adjacent sugars is connected via which two carbons of the
sugar molecules?
A) 2' and 6'
B) 3' and 5'*
C) 1' and 6'
D) 1' and 5'
B) Neurotransmitters
D) Transport
Chem 60 Takehome Final Exam Student _____________________________________
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37.
The type of RNA that contains the anticodon for an amino acid is called:
A) tRNA*
B) vRNA
C) rRNA
D) mRNA
38.
What is complimentary strand for a DNA sequence, TCGA?
A) CTAC
B) GATC
C) TGCA
D) AGCT*
39.
Thymine is what type of nitrogenous base?
A) Porphyrin
B) Pyrrole
C) Purine
40.
The second step of protein synthesis occurs in the ribosomes and is called:
A) translation*
B) transfer
C) transcription
D) copying
41.
The acetyl group in acetyl CoA is linked through what kind of bond?
A) C-O bond
B) C-C bond
C) C-N bond
D) C-S bond*
42.
Molecular collisions in a reaction are necessary for a reaction to take place because:
A) the collisions of rapidly moving molecules provide energy
B) the reactant molecules must directly interact with each other to produce product
C) the number of collisions
D) all of the above*
43.
Some enzymes require certain metal ions, such as Mg+2 or Zn+2, in order to have full activity. This component is
called a:
A) cofactor*
B) substrate
C) regulator
D) coenzyme
44.
The protein factory in a cell is contained in a ribosome. The ribosome is made of what type of nucleic acid
strands?
A) mRNA
B) vRNA
C) tRNA
D) rRNA*
45.
The beginning process of protein synthesis by DNA is called:
A) transfer
B) translation
C) transcription*
46.
How many CO 2 molecules are formed in one turn of the citric acid cycle?
A) 2*
B) 1
C) 4
D) 6
47.
When a molecule binds to an enzyme at a site other than the active site and affects enzyme shape it is called a(n):
A) irreversible inhibitor
B) competitive inhibitor
C) covalent modification
D) noncompetitive inhibitor*
48.
A correct set of complimentary base pairs in DNA are:
A) AT*
B) TC
C) AU
D) GA
49.
Which of the following is the first molecule formed in the citric acid cycle?
A) Citrate*
B) Fumarate
C) Oxaloacetate
D) Succinate
50.
A fast reaction rate for a chemical reaction is dependent on:
A) having a small activation energy*
B) having a large activation energy
C) being endothermic
D) being exothermic
D) Pyrimidine*
D) copying