Dna: The Genetic Material
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Questions Bank
- Genetics: An IntroductionDNA: The Genetic MaterialDNA ReplicationGene FunctionGene Expression: TranscriptionGene Expression: TranslationDna Mutation,DNA Repair,and Transposable ElementsGenomics: The Mapping and Sequencing of GenomesFunctional and Comparative GenomicsRecombinant DNA TechnologyMendelian GeneticsChromosomal Basis of InheritanceExtensions of and Deviations From Mendelian Genetic PrinciplesGenetic Mapping in EukaryotesGenetics of Bacteria and BacteriophagesVariations in Chromosome Structure and NumberRegulation of Gene Expression in Bacteria and BacteriophagesRegulation of Gene Expression in EukaryotesGenetic Analysis of DevelopmentGenetics of CancerPopulation GeneticsQuantitative GeneticsMolecular Evolution
Question 1
Free
Short Answer
Please select the best match for each term.
A)The basic structural unit of chromatin with "bead-on-a-string" morphology
B)The region of a eukaryotic chromosome found near the attachment point of mitotic or meiotic spindle fibers
C)A DNA molecule and associated proteins
D)The constituent monomer of DNA and RNA
E)The region of a prokaryotic cell where the chromosome is located
-1)Centromere
2)Nucleoid
3)Nucleotide
4)Chromosome
5)Nucleosome
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Question 2
Free
Multiple Choice
Loosely aggregated DNA bound to proteins in a eukaryotic cell is called
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chromosomes.
chromatin.
chromatid.
centromere.
nucleoid.
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Question 3
Free
Multiple Choice
The C-value is the amount of DNA in a
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haploid genome.
diploid genome.
bacterial genome.
eukaryotic genome.
cell's nucleus.
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Question 4
Free
Multiple Choice
The chromosome of most prokaryotes differs from those of eukaryotes in that
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the prokaryotic chromosome is linear,while the eukaryotic chromosome is circular.
the prokaryotic chromosome is circular,while the eukaryotic chromosome is linear.
the prokaryotic chromosome does not replicate before mitosis,while the eukaryotic chromosome does.
the prokaryotic chromosome does not contain genes,while the eukaryotic chromosome does.
the prokaryotic chromosome is not necessary for the organism's survival,while the eukaryotic chromosome is.
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Question 5
Free
Multiple Choice
A Barr body is an example of
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constitutive euchromatin.
facultative euchromatin.
facultative heterochromatin.
a nucleosome.
constitutive heterochromatin.
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Question 6
Multiple Choice
The definition of transformation is
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the shift of genetic information from DNA to protein.
the genetic alteration of an organism.
the uptake of genetic information by a cell from the environment.
Both B and C
None of these
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Question 7
Multiple Choice
In Griffith's experiment involving the transformation of Streptococcus pneumoniae,
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the R strain was virulent.
the S strain was virulent.
both the R and S strains were virulent.
the R strain had a protein capsule.
the S strain had a protein capsule.
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Question 8
Multiple Choice
What was the transforming principle isolated in Griffith's experiment?
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Protein
RNA
DNA
Virus
Polysaccharide
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Question 9
Multiple Choice
Who used radioactively labeled T2 bacteriophage to confirm the identity of the transforming principle?
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Griffith
Hershey and Chase
Avery
Gierer and Schramm
Beadle and Tatum
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Question 10
Multiple Choice
Which part of the T2 bacteriophage entered E.coli cells in the experiment which confirmed the identity of the transforming principle?
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The RNA
The DNA
The whole virus
The protein coat
No part
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Question 11
Multiple Choice
Certain ________ have RNA for their genetic material.
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bacteria
viruses
plants
eukaryotes
prokaryotes
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Question 12
Multiple Choice
What did the X-ray diffraction patterns initially reveal about the DNA molecule?
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It is of uniform diameter and has a helical structure.
It is a helical molecule with paired bases in the center.
It is double-stranded with antiparallel strands.
It is acidic,phosphorus-rich,and large.
It contains hereditary information.
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Question 13
Multiple Choice
What did Watson and Crick deduce about the three-dimensional structure of DNA?
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There is a repeating pattern every 3.4 nm and every 0.34 nm.
It is a double-stranded helix.
It contains a lot of phosphorus.
It is a large molecule.
It consists of supercoiled chromatin.
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Question 14
Multiple Choice
Which of the following is a nonhistone protein found in chromatin?
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H1
HMG
H2A
H5
All of these
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Question 15
Multiple Choice
Antiparallel means that
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the two polynucleotide chains run in opposite directions.
each DNA molecule consists of one old and one new strand.
opposite strands are held together by base pairing.
the helix twists to the right.
there is complementary base-pairing.
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Question 16
Multiple Choice
Complementary base-pairing allows for
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spontaneous mutations to occur.
genes to be expressed as a phenotype.
DNA to serve as its own template for replication.
replication to be semiconservative.
covalent bonds to form between the opposite bases.
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Question 17
Multiple Choice
Which of the following are the purine nucleotides in DNA?
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Adenine and thymine
Cytosine and guanine
Adenine and cytosine
Guanine and adenine
Thymine and uracil
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Question 18
Multiple Choice
Topoisomerases function to
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remove nucleotides from DNA.
join DNA pieces together.
twist DNA molecules.
attach DNA loops to scaffold proteins.
move chromosomes along spindle fibers.
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Question 19
Multiple Choice
Which form of DNA is a left-handed double helix?
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A-DNA
B-DNA
L-DNA
R-DNA
Z-DNA
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Question 20
Multiple Choice
The displacement loop (D-loop)may be a characteristic of
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centromeres.
telomeres.
A-DNA.
B-DNA.
Z-DNA.
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