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BISC 261 Exam 2 Wells Test with Questions with 100% Correct Answers
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BISC 261 Exam 2 Wells Test with Questions with 100% Correct Answers
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BISC 261 Exam 2 Wells Test withQuestions with 100% Correct Answers
Which of the following would be the best method for reducing the transmission
of endospore-forming bacterial pathogens in health care settings?
A. Autoclaving all biomedical waste
B. Using 0.2-micrometer syringe filters when administering intravenous fluids
C. Using HEPA filtration
D. UV-C light irradiation of hospital rooms - Answer Autoclaving all biomedical waste
_____________________________ are constitutive genes. They are always expressed in
cells. - Answer Housekeeping genes
Genes for catabolic pathways are usually _____________ genes. - Answer inducible
Genes for anabolic pathways are usually ______________ genes. - Answer repressible
, The _____________ is an example of a catabolic pathway. - Answer lac operon
The _____________ is an example of a anabolic pathway. - Answer trp operon
______________________________ are any proteins with a ______________________,
that bind directly to the DNA double helix and cause changes in the transcription
of genes. - Answer Transcriptional regulatory proteins, helix-turn-helix motif
_________________________ is when transcription is regulated by the binding of a
repressor protein to the operator region that results in the inhibition of transcription. -
Answer Negative transcriptional control
______________________ is when transcription is regulated by the binding of an
activator protein to the activator binding sites that stimulates transcription. - Answer
Positive transcriptional control
A _____________________________ is a protein that regulates the transcription of
multiple different operons from many different pathways in a cell. - Answer
Global regulatory protein
_____________________________ is a common mechanism for global regulation in
cells from all three domains of life where binding of a molecule to a
_________________, a _____________ membrane protein, that initiates a single
cascade through the cell via a ___________________, a ________________ membrane
protein, which controls the transcription of many genes. Oftentimes the signal is carried
throughout cells via a _____________________. - Answer Two component signal
transduction; sensor kinase; integral; response regulators; peripheral;
secondary messengers
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