Exam 4 Barbosa Questions And Answers Already Graded A+
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Course
Barbosa
Institution
Barbosa
All of the following factors contribute to hospital-acquired infections (HAI) except: -
️️none of the answers
The preservation of beef jerky from microbial growth relies on which method of microbial
control? - ️️desiccation
Which of the following is most resistant to chemical biocides? ...
Exam 4 Barbosa
All of the following factors contribute to hospital-acquired infections (HAI) except: -
✔️✔️none of the answers
The preservation of beef jerky from microbial growth relies on which method of microbial
control? - ✔️✔️desiccation
Which of the following is most resistant to chemical biocides? - ✔️✔️gram-negative
bonding
Any procedure that destroys the non-spore forming contaminants on inanimate
(nonliving) objects is sterilization T/F - ✔️✔️False
The "backbone" of the DNA molecules is made up of 2 components: - ✔️✔️sugar and
phosphate
Transcription in prokaryotes occurs in? - ✔️✔️cytoplasm
Which of the following is not a method of horizontal gene transfer in prokaryotes? -
✔️✔️binary fission
Transformation is defined as: - ✔️✔️change in genotype and phenotype due to the
assimilation of external DNA by a cell
In the figure above, if base 4 is thymine, what is base 4? (hint: remember the
complimentary base pairing rule of bases in DNA) - ✔️✔️adenine
In the figure above, if base 4 is thymine, what is base 11? - ✔️✔️thymine
Which of the following pairs is mismatched? - ✔️✔️DNA polymerase- makes a
molecule of DNA from an RNA template
Which of the following statements is false about DNA? - ✔️✔️DNA replication proceeds
in only one direction around the circular bacterial chromosome
Which of the following is a product of DNA replication? - ✔️✔️two DNA molecules each
with a new strand of DNA
All are differences between a DNA molecule and an RNA molecule except: - ✔️✔️DNA
molecule has a sugar called deoxyribose whereas RNA has ribose
, Refer to table above. If the sequence of amino acid encoded by a strand of mRNA is
serine-alanine-lysine-leucine, what is the order of bases in the strand of DNA? -
✔️✔️AGACGTTTCAAT
A point mutation that changes a codon specifying an amino acid into a stop codon is
called: - ✔️✔️nonsense mutation
A(n) ___ mutation is unintentionally caused: - ✔️✔️silent
In a frameshift mutation: - ✔️✔️- one or two base pairs are inserted
- the reading frame is changed
- one or two base pairs are deleted
Biotechnology: - ✔️✔️- uses microorganisms, cells, or cell components to make cell
products
- uses microorganisms to make vaccines
- uses microorganisms to make hormones
Recombination of DNA only occurs naturally in microbes T/F - ✔️✔️True
Which of the following statements provide the most significant support for the idea that
viruses are nonliving chemicals? - ✔️✔️They cannot reproduce themselves outside the
host.
Which of the following would be the first step in the biosynthesis of a virus with reverse
transcriptase? - ✔️✔️A complimentary strand of DNA must be synthesized from an
RNA template.
The definition of lysogeny is: - ✔️✔️Phage DNA is incorporated into host cell DNA
In the figure above, which structure is a complex virus? - ✔️✔️B
Referring to culturing virus in lab, a clear area against a confluent "lawn" of bacteria is
called a: - ✔️✔️- phage
- pock
- cell lysis
(all of the above)
Which of the following statements about viruses is false? - ✔️✔️viruses use their own
catabolic enzymes
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