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microbiology chpter 8
lccc microbial genetics
22
Biology
Undergraduate 2
04/18/2014

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Term
What is a method of vertical gene transmission?
Definition
cell division
Term
Frederick Griffith did experiments on genetic transformation. What statement about his experiments is accurate?
Definition
Griffith found that DNA released from dead (virulent) bacteria entered live (avirulent) bacteria and changed them genetically, causing them to become virulent.
Term
Which of the following enzymes unwinds the two strands of DNA so that they can be copied during replication?
Definition
helicase
Term
Random, heritable genetic mutations are a necessary for what to occur?
Definition
This variation is necessary for natural selection to occur
Term
Deleting or inserting one nucleotide pair in the middle of a gene is an example of what?
Definition
frameshift mutation
Term
What is a DNA strand complementary to CGA ATC AGC?
Definition
GCT TAG TCG
Term
All types of RNA in the cell are synthesized by what, which uses a portion of DNA as a template for copying.
Definition
transcription
Term
what is made by copying specific regions of DNA called genes. Ribosomes use mRNA as instructions, which provide a code specifying the order of amino acids in a protein.
Definition
mRNA
Term
DNA is constructed of
Definition
two strands of nucleotides running antiparallel
Term
Which of the following is NOT a product of transcription?
tRNA
mRNA
rRNA
a new strand of DNA
All of these are products of transcription
Definition
a new strand of DNA
Term
Transformation is the transfer of DNA from a donor to a recipient cell







as naked DNA in solution.
by cell-to-cell contact.
by crossing over.
by sexual reproduction.
by a bacteriophage.
Definition
as naked DNA in solution.
Term
Conjugation differs from reproduction because conjugation







transcribes DNA to RNA.
copies RNA to make DNA.
transfers DNA horizontally, to cells in the same generation.
replicates DNA.
transfers DNA vertically, to new cells.
Definition
transfers DNA horizontally, to cells in the same generation
Term
The necessary ingredients for DNA synthesis can be mixed together in a test tube. The DNA polymerase is from Thermus aquaticus, and the template is from a human cell. The DNA synthesized would be most similar to







human DNA.
T. aquaticus DNA.
a mixture of human and T. aquaticus DNA.
human RNA.
T. aquaticus RNA.
Definition
human DNA.
Term
An enzyme that copies DNA to make a molecule of RNA is
Definition
RNA polymerase.
Term
true or false:
Bacteria typically contain multiple chromosomes
Definition
False
Term
What are the products of semiconservative replication for a double-stranded DNA molecule?
Definition
Two double-stranded DNA molecules, each consisting of one parental strand and one daughter strand
Term
Why is DNA replication essential for a cell?
Definition
An organism must copy its DNA to pass genetic information to its offspring
Term
What is the function of the parental DNA in replication?
Definition
It serves as the template for DNA replication
Term
Transcription produces what?
Definition
mRNA, tRNA, and rRNA are all produced by transcription
Term
What is involved in bringing amino acids to the ribosomes
Definition
tRNA
Term
What is the initial target of RNA polymerase?
Definition
The promoter
Term
RNA polymerase is guided by what?
Definition
template strand of DNA.
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