A palindrome is
A. A DNA sequence that contains only one kind of base
B. A
DNA sequence that contains only two kinds of bases
C. A sequence
that reads the same from left to right as from right to left
D.
None of the above
C. A sequence that reads the same from left to right as from right to left
In the polymerase chain reaction, it is possible to:
A. It is possible to amplify small amounts of DNA without
cloning
B. Conditions must be carefully controlled to prevent
explosions
C. Reaction mixtures must be chilled at all times
D. All of the above
A. It is possible to amplify small amounts of DNA without cloning
Antibiotic resistance genes in vectors are often used as selectable
markers in cloning
A. True
B. False
A. True
A bacteriophage is
A. A virus that attacks bacteria
B. A piece of DNA derived
from two or more sources
C. A small, circular piece of DNA that
is not part of the bacterial chromosome
D. An artificially
created cytoplasm
A. A virus that attacks bacteria
Which of the following statements regarding restriction endoculeases
is TRUE?
A. They attack RNA, not DNA
B. They can produce
"sticky ends"
C. They can attack one single stranded
DNA sequences only
D. They do not display sequence specificity
in their site of attack
B. They can produce "sticky ends"
The following item was the most important scientific discovery for
the development of PCR as a commercially successful and widely-used
procedure
A. Taq polymerase
B. Heat-resistant DNA
C.
Heat-resistant primers for DNA synthesis
D. Robotic machines to
run the PCR procedure
E. Heat-resistant nucleoside triphosphate substrates
A. Taq polymerase
In recombinant DNA technology
A. Vectors are used as carriers for recombinant genes
B.
It is possible to insert eukaryotic genes into prokaryotic DNA
C. Foreign DNA is frequently inserted into a bacterial plasmid
D. All of these
D. All of these
The natural function of restriction endonucleases is to
A. Protect bacterial cells from invasion by viruses
(bacteriophages)
B. Help bacteriophages infect cells
C.
Regulate gene expression from specific promoters
D. Remove
chromatic from histones
A. Protect bacterial cells from invasion by viruses (bacteriophages)
Which is the dominant form of DNA found in the cell?
A. A
B. B
C. Z
D. H
B. B
Ethidium Bromide slips between the bases of DNA giving it fluorescent
properties that differ from those observed when it is free in solution
A. True
B. False
A. True
The Z form of DNA
A. Does not exist in nature
B. Is right-handed
C.
Tends to occur in purine-only sequences
D. Tends to occur in
pyrimidine-only sequences
E. Tends to occur in alternating
purine-pyrimidine sequences
E. Tends to occur in alternating purine-pyrimidine sequences
Histones are proteins that
A. Are frequently associated with eukaryotic DNA
B. Are
frequently associated with prokaryotic DNA
C. Are never found in
association with DNA
D. Contain a high percentage of residues
with carboxylic acid side chains
A. Are frequently associated with eukaryotic DNA
Which of the following nucleobases is a purine?
A. Adenine
B. Cytosine
C. Thymine
D. Uracil
A. Adenine
Which of the following bases is NOT found in RNA?
A. A
B. C
C. G
D. T
E. All of these are
found in RNA
D. T
The outside diameter of a piece of DNA is closest to
A. 2A
B. 20A
C. 200A
D. 2000A
B. 20A
What distinguishes nucleotides from nucleosides?
A. Nucleosides lack the phosphate group
B. Nucleosides
lack the sugar group
C. Nucleosides lack a nitrogenous base
D. None of the above
A. Nucleosides lack the phosphate group
The double helix of DNA is which level of structure?
A. Primary
B. Secondary
C. Tertiary
D. Quaternary
B. Secondary
Which of the following groups is NOT present in a cerebroside?
A. Sphingosine
B. Fatty acid
C. Phosphate
D. Sugar
C. Phosphate
Unsaturated fatty acids usually have ____ double bonds?
A. Cis
B. Trans
A. Cis
How many hydroxyl groups does a molecule of glycerol have?
A. 1
B. 2
C. 3
D. 4
C. 3
What characteristics is used most often to define lipids?
A. Ionic Charge
B. Melting Point
C. Solubility
D. Ability to bind metal ions
C. Solubility
Which of the following is a metabolic precursor of prostaglandins and
leukotrienes?
A. Vitamin A
B. Arachidonic Acid
C. Sphingomyelin
D. Cholesterol
B. Arachidonic Acid
The myelin sheaths of neurons typically contain large amounts of
A. Waxes
B. Triacylglycerols
C. Cholesterol
D. Sphingolipids
D. Sphingolipids
Which of the following is NOT a product of saponification of a
triglyceride?
A. Long chain fatty alcohols
B. The salt of the fatty
acids
C. Soaps
D. Glycerol
E. All of these are
products of saponification
A. Long chain fatty alcohols
What does amphiphatic mean?
A. Having both positive and negative charges
B. Having
both acid and base properties
C. Having both hydrophilic and
hydrophobic regions
D. Having two stereoisomers
C. Having both hydrophilic and hydrophobic regions
Which of the following groups is NOT present in sphingomyelin?
A. Sphingosine
B. Fatty acid
C. Phosphate
D. Sugar
D. Sugar
Biological waxes are composed of:
A. Glycerol and only one fatty acid
B. Glycerol and two
fatty acids
C. A fatty acid and a long chain alcohol
D.
Cholesterol and a fatty acid
C. A fatty acid and a long chain alcohol
Base pairs with a propeller twists
A. Are found only in Z DNA
B. Have optimum base stacking
C. Bind water in the minor groove
D. Have stronger
hydrogen bonds than base pairs without a propeller twist
B. Have optimum base stacking
The structure below is that of
A. Adenine
B. Thymine
C. Cytosine
D. Guanine
A. Adenine
Enzymes that seal nicks in DNA are called
A. Restriction enzymes
B. Bacteriophages
C. Ligases
D. Exonucleases
C. Ligases