Is it likely that the increase in antibiotic-resistant organisms is related to the increase in hand washing in healthcare facilities?
A. Yes, because the microbiota embedded in the skin oils of the healthcare workers are being killed off and replaced by resistant organisms.
B. No, because the increase in antibiotic-resistant organisms is a result of exposure to antibiotics, not alcohol.
C. No, because the handwashing prevents organisms from becoming antibiotic-resistant.
D. Yes, because the organisms are developing resistance to the alcohol and therefore antibiotics also.
B. No, because the increase in antibiotic-resistant organisms is a result of exposure to antibiotics, not alcohol.
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The following enzymes play important roles in DNA replication: DNA polymerase Primase Ligase Helicase In what order do they work during replication?
A. DNA polymerase, primase, ligase, helicase B. Primase, helicase, ligase, DNA polymerase C. DNA polymerase, helicase, primase, ligase D. Helicase, primase, DNA polymerase, ligase E. Ligase, helicase, DNA polymerase, primase
A ____ is a structural modification that enables
an individual to exploit their habitat more efficiently
a. key innovation b. mutation c. morphological convergence d. morphological divergence e. homologous structure
When considering the initiation of transcription, one often finds consensus sequences located in the region of the DNA where RNA polymerase(s) binds. Which of the following is a common consensus sequence?
A) TTTTAAAA B) satellite DNAs C) TATA D) any trinucleotide repeat E) GGTTC
In 1997, Dolly the sheep was cloned. Which of the following processes was used?
A) replication and dedifferentiation of adult stem cells from sheep bone marrow B) separation of an early stage sheep blastula into separate cells, one of which was incubated in a surrogate ewe C) fusion of an adult cell's nucleus with an enucleated sheep egg, followed by incubation in a surrogate D) isolation of stem cells from a lamb embryo and production of a zygote equivalent