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.   H-bonded anti parallel strands
B.   alternating sugar & phosphate along a strand
C.   nucleotide sequence
D.   double helix shape
Question #2
A gene is best defined as a ________________.
A.   sequence of DNA nucleotides in a section of DNA coding for a product
B.   set of 3 nucleotides coding for an amino acid
C.   base sequence in mRNA
D.   anti codons of tRNA
Question #3
All are nitrogenous bases contained in different DNA nucleotides except _____________.
A.   Adenine
B.   Thymine
C.   Guanine
D.   Uracil
E.   Cytosine
Question #4
The main reason why cells & viruses replicate their genetic material is to _____________________________.
A.   regulate gene expression
B.   provide a back up copy
C.   protect themselves from harsh conditions
D.   prepare for reproduction
Question #5
During ___________________, information from an mRNA is used to synthesize a specific protein.
A.   DNA replication
B.   lac operon
C.   transcription
D.   translation
Question #6
Proofreading & repair mechanisms occur during both DNA replication & RNA replication.
A.   False
B.   True
Question #7
To turn the lac operon on in E. coli, allolactose binds to the repressor & "pulls" it away from the ___________________ .
A.   promoter
B.   structural genes
C.   operator
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.   Gene editing
B.   DNA profiling
C.   DNA sequencing
D.   PCR
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.   genetic engineering
C.   DNA profiling
D.   DNA sequencing
Question #10
___________________ occurs when “naked” fragments of DNA from the culture medium are absorbed by competent bacterial cells.
A.   Transduction
B.   Transformation
C.   Transposition
D.   Conjugation

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