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Exam 8: Microbial Genetics and Genetic Engineering

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Question 41

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A bacteriophage transfers DNA of the previous host to the current host.This is an example of ________.

A) conjugation
B) generalized transduction
C) specialized transduction
D) a reaction of an Hfr cell
E) None of the choices are correct.

F) D) and E)
G) A) and B)

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Question 42

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In bacteria,initiator tRNA carries formyl methionine.

A) True
B) False

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Question 43

Multiple Choice

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A permanent,inheritable change in the genetic information is called ________.

DNA is denatured at ________.

After three replication cycles in PCR,there will be a total of three double-stranded DNA molecules.

A 59-year-old female has been diagnosed with Escherichia coli infection following the consumption of contaminated meat. The patient is exhibiting a high fever, severe abdominal cramping, and diarrhea. The RN provides supportive care and fluid resuscitation as ordered. The nurse and medical team provide education to the patient and her family regarding the genetics of the E. coli bacterium. -The RN instructs the family that the transfer of genetic material can involve contact between two bacterial cells.DNA can pass from one cell to the other through a pilus during this process,which is called ________.

DNA fragments can be separated in gel electrophoresis because ________.

Which of the following is incorrect about transfer RNA?

Which of the following is not true of an organism's genotype?

An 18-month-old male is admitted to the hospital with symptoms of a respiratory infection. The patient's mother reports that since birth, the toddler has frequently had a cough and copious nasal secretions. His weight gain has been poor, despite his excellent appetite. The patient appears in moderate respiratory distress, so oxygen therapy and intravenous fluids are initiated. The physician orders tests for cystic fibrosis due to the patient's history and clinical presentation. When the tests confirm the diagnosis, as the RN, you provide education to the mother regarding this autosomal recessive disease. -The RN is aware that many different types of mutations have been identified in the gene that causes cystic fibrosis.Which of the following terms would best describe a mutation that changes a normal codon into a stop codon,usually resulting in a nonfunctional protein? 

If the wild-type DNA sequence reads THE CAT ATE THE BIG RAT,what type of mutation would change the sequence to THE CAT ATE THE BAG RAT?

Excised introns form structures called lariats.

Repressible operons are normally turned on in the cell.

A recombinant organism is one that has sustained a change in its genome through receipt of DNA from a different organism.

The benefit of the bacterial operon is that ________.

Restriction endonucleases are obtained from various species of bacteria.

All mutations are detrimental to the cell.

The DNA of microorganisms is made up of subunits called ________.

If the wild-type DNA sequence reads THE CAT ATE THE BIG RAT,what type of mutation would change the sequence to THE CAT ATE (stop) ?

The process in which mutations are removed and the correct bases added is called ________.