Microbiology 020 - General Microbiology » Spring 2022 » Review Quiz 6

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Question #1
What characteristic of the DNA differs from one type of organism to another?
A.   alternating sugar & phosphate along a strand
B.   double helix shape
C.   H-bonded anti parallel strands
D.   nucleotide sequence
Question #2
A gene is best defined as a ________________.
A.   base sequence in mRNA
B.   anti codons of tRNA
C.   set of 3 nucleotides coding for an amino acid
D.   sequence of DNA nucleotides in a section of DNA coding for a product
Question #3
All are nitrogenous bases contained in different DNA nucleotides except _____________.
A.   Adenine
B.   Cytosine
C.   Uracil
D.   Thymine
E.   Guanine
Question #4
The main reason why cells & viruses replicate their genetic material is to _____________________________.
A.   provide a back up copy
B.   prepare for reproduction
C.   regulate gene expression
D.   protect themselves from harsh conditions
Question #5
During ___________________, information from an mRNA is used to synthesize a specific protein.
A.   translation
B.   transcription
C.   DNA replication
D.   lac operon
Question #6
Proofreading & repair mechanisms occur during both DNA replication & RNA replication.
A.   True
B.   False
Question #7
To turn the lac operon on in E. coli, allolactose binds to the repressor & "pulls" it away from the ___________________ .
A.   structural genes
B.   operator
C.   promoter
D.   regulatory gene
Question #8
Genes in DNA fragments are amplified (billions of copies created) relatively rapidly using _______________________. This method is presently being used to detect presence of SARS-CoV-2 in patients and potential carriers.
A.   PCR
B.   DNA sequencing
C.   DNA profiling
D.   Gene editing
Question #9
All of the techniques below help identify the source of infection, trace it and prevent a major outbreak of an epidemic except _______________.
A.   PCR
B.   DNA sequencing
C.   DNA profiling
D.   genetic engineering
Question #10
___________________ occurs when “naked” fragments of DNA from the culture medium are absorbed by competent bacterial cells.
A.   Transformation
B.   Transposition
C.   Transduction
D.   Conjugation

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