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33 Cards in this Set

  • Front
  • Back
All of the following are true of bacterial chromosome EXCEPT:
a. it is composed of a combination of RNA and DNA
b. it is replicated by a semiconservative manner.
c. it is usually in the form of a covalently closed circle
d. only a single copy is present
it is composed of a combination of RNA AND DNA
Which of the following is NOT used in the process of DNA replication?
a. DNA ligase
b. mRNA
c. DNA polymerase
d. Okazaki fragments
b. mRNA
The base sequence of the messenger RNA molecule which is complementary to the DNA sequence 5'- CGTTAGA-3' would be
If a protein is 50 amino acids in length, how many nucleotides would the coding region of the mRNA have been?
a. 50
b. 150
c. 300
d. none of the responses are correct.
A bacterial genome would consist of:
a. only the structural genes in the chromosome.
b. the complete set of DNA in the cell
c. the DNA and RNA present in the cell.
d. all the expressed proteins in the cell
the complete set of DNA in the cell
Most of the features listed below are part of the bacterial operons. Which of these features is important to the function of the operon but is NOT physically located in the operon itself?
a. regulatory gene
b. operator
c. promoter
d. structual genes
regulatory gene
In one of the forms of DNA transfer in bacteria, bacterial DNA is transferred from one cell to another packaged in a viral coat. If the bacterial DNA which is transferred by this process is randomly packaged, the process is referred to as:
a. generalized transduction.
b. generalized transformation
c. specialized transduction
d. transfection
generalized transduction
Conjugation occurs in Gram positive bacteria IF the cells possess:
a. pili
b. competence
c. flagella
d. clumping factors
clumping factors
Which type of DNA transfer requires the donor cell to have released DNA into the environment?
a. transformation
b. transduction
c. conjugation
Which one of the following are linked and occur simultaneously in bacteria, but not in eukaryotic cells?
a. replication and transcription
b. transcription and translation
c. termiator and induction
d. translation and repression
transcription and translation
When the lac operon is repressed what enzyme is unable to bind to the DNA?
a. DNA polymerase
b. RNA polymerase
c. primase
d. helicase
RNA polymerase
Which of the following occurs when an operon is induced?
a. translation continues throug to the next operon along the strand of DNA.
b. translation is halted.
c. Transcription is enhanced.
d. proteins made from the structural genes are activated.
transcription is enhanced
t or f. Bacterial DNA can undergo multiple rounds of replication simultaneously.
t or f. New strands of DNA and RNA are always made in the 3'to 5' direction.
false. 5' to 3'
t or f. Cell-cell contact is necessary for bacterial conjugation to occur, but not essential to transduction.
t or f. F' plasmides carry not only plasmid genes but also have a few genes acquired from the bacterial chromosome.
t or f. Competence is used to describe the ability of a bacterium to participate in transduction.
false. transformation
t or f. An integrated f plasmid transfers an intact f plasmid as well as chromosomal genes.
false. a piece of plasmid
A F- cell will undergo a sex change if it conjugates with an f+ cell.
t or f. In any replication fork, one strand of continuous DNA is made and one strand of discontinuous DnA is also made.
t or f. During the process of transcription, both strands of dna are transcribed.
t or f. All mutations result in harmful changes to the organism.
false not all
t or f. The 'central dogma' refers to the flow of information in the cell: DNA to RNA and then to protein.
t or f. In semiconservative DNA replication, a new strand of RNA with bases complementary to a parental strand (template) combines with that parental strand to form a double helix.
false DNA not RNA
t or f. Okazaki fragments form on the leading strand during DNA replication.
false lagging
Which process (replication, transcription, or translation) is the primase enzyme used in and what does the primase do?
replication: primase synthesizes a short RNA molecule that is complementary to the template DNA strand.
Which of the following is not used in the process of DNA replication?
a. dna polymerase
b. repressor
c. dna ligase
d. okazaki fragments
DNA helicases are enzymes with:
a. break hydrogen bonds between complementary nucleotides.
b. seal gaps between dna fragments
c. assist in recognition of promoters during transcription
d. proofread dna fragments
e. synthesize short dna molecules needed by dna polymerase
break hydrogen bonds between complementary nucleotides
In one of the forms of DNA transfer in bacteria, bacterial DNA is transferred from one cell to another packaged in a viral coat. If the bacterial DnA which is transferred by this process is always the same piece, the process is referred to as:
a. generalized transduction
b. generalized transformtion
c. specialized transduction
d transfection
specialized transduction
Which of the following is one way that the two polymerases -dna and rna do not differ from each other
a. type of nucleotides used
b. direction of movement
c. speed of polymerization
d. proofreading
e. requirement for primer
direction of movement
Semiconservative DNA replication means that:
each resulting DNA molecule is composed of one original strand and one new strand
As a result of his experiments of Streptococcus pneumoniae, Frederick GRiffth discovered the process of:
a. transfection
b. transduction
c. conjugation
d. transformation
e. transposon
t or f. In generalized transduction, viruses carry specific fragments of DNA from one cell to another.
false random fragments