©JUSTTRACY EXAM SOLUTIONS
21/11/202410:20AM
Exam 4 Barbosa Questions And
Improved Responses
Which of the following pairs is mismatched? - answers✔✔DNA polymerase- makes a
molecule of DNA from an RNA template
Which of the following statements is false about DNA? - answers✔✔DNA replication
proceeds in only one direction around the circular bacterial chromosome
Which of the following is a product of DNA replication? - answers✔✔two DNA molecules
each with a new strand of DNA
All are differences between a DNA molecule and an RNA molecule except: -
answers✔✔DNA molecule has a sugar called deoxyribose whereas RNA has ribose
The "backbone" of the DNA molecules is made up of 2 components: - answers✔✔sugar and
phosphate
Transcription in prokaryotes occurs in? - answers✔✔cytoplasm
Which of the following is not a method of horizontal gene transfer in prokaryotes? -
answers✔✔binary fission
Transformation is defined as: - answers✔✔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) - answers✔✔adenine
In the figure above, if base 4 is thymine, what is base 11? - answers✔✔thymine
, ©JUSTTRACY EXAM SOLUTIONS
21/11/202410:20AM
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? -
answers✔✔AGACGTTTCAAT
A point mutation that changes a codon specifying an amino acid into a stop codon is called: -
answers✔✔nonsense mutation
A(n) ___ mutation is unintentionally caused: - answers✔✔silent
In a frameshift mutation: - answers✔✔- one or two base pairs are inserted
- the reading frame is changed
- one or two base pairs are deleted
Biotechnology: - answers✔✔- 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 - answers✔✔True
All of the following factors contribute to hospital-acquired infections (HAI) except: -
answers✔✔none of the answers
The preservation of beef jerky from microbial growth relies on which method of microbial
control? - answers✔✔desiccation
Which of the following is most resistant to chemical biocides? - answers✔✔gram-negative
bonding
Any procedure that destroys the non-spore forming contaminants on inanimate (nonliving)
objects is sterilization T/F - answers✔✔False
21/11/202410:20AM
Exam 4 Barbosa Questions And
Improved Responses
Which of the following pairs is mismatched? - answers✔✔DNA polymerase- makes a
molecule of DNA from an RNA template
Which of the following statements is false about DNA? - answers✔✔DNA replication
proceeds in only one direction around the circular bacterial chromosome
Which of the following is a product of DNA replication? - answers✔✔two DNA molecules
each with a new strand of DNA
All are differences between a DNA molecule and an RNA molecule except: -
answers✔✔DNA molecule has a sugar called deoxyribose whereas RNA has ribose
The "backbone" of the DNA molecules is made up of 2 components: - answers✔✔sugar and
phosphate
Transcription in prokaryotes occurs in? - answers✔✔cytoplasm
Which of the following is not a method of horizontal gene transfer in prokaryotes? -
answers✔✔binary fission
Transformation is defined as: - answers✔✔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) - answers✔✔adenine
In the figure above, if base 4 is thymine, what is base 11? - answers✔✔thymine
, ©JUSTTRACY EXAM SOLUTIONS
21/11/202410:20AM
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? -
answers✔✔AGACGTTTCAAT
A point mutation that changes a codon specifying an amino acid into a stop codon is called: -
answers✔✔nonsense mutation
A(n) ___ mutation is unintentionally caused: - answers✔✔silent
In a frameshift mutation: - answers✔✔- one or two base pairs are inserted
- the reading frame is changed
- one or two base pairs are deleted
Biotechnology: - answers✔✔- 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 - answers✔✔True
All of the following factors contribute to hospital-acquired infections (HAI) except: -
answers✔✔none of the answers
The preservation of beef jerky from microbial growth relies on which method of microbial
control? - answers✔✔desiccation
Which of the following is most resistant to chemical biocides? - answers✔✔gram-negative
bonding
Any procedure that destroys the non-spore forming contaminants on inanimate (nonliving)
objects is sterilization T/F - answers✔✔False
