Which macromolecule did the majority of scientists favor as the "first" to be found in protobionts?
A. DNA.
B. RNA.
C. Amino acids.
D. Proteins.
B. RNA.
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The agency that requires health care facilities to provide employees with all devices and mechanisms necessary to protect them from the hazards encountered in the laboratory is:
a. Department of Health and Environmental Control (DHEC). b. Occupational Safety and Health Adminis-tration (OSHA). c. Centers for Disease Control and Preven-tion (CDC). d. Health Emergency Planning Advisor (HEPA).
In primary active transport, the carrier protein that transports a substance also hydrolyzes ATP to power the transport
directly.
Indicate whether the statement is true or false.You isolate a bacteria strain with modified peptidoglycan tetra peptide. The terminal D-alanine is replace by D-lysine, this does prevent cross-linking from occurring.We expect that organism to be resistant to?
a. penicillin b. rifampicin c. vancomycin d. none of the above
All of the following are true statements regarding clinical specimens EXCEPT:
a) clinical specimens include saliva, feces, and blood b) clinical specimens must be properly labeled and promptly transported to the lab c) universal precautions are observed in order to protect specimens from contamination d) clinical specimens are often transported in special media to help preserve them