Microbes that are fatal and have no treatment or vaccines should be handled in a lab of what biosafety level?
Biosafety Level 1
Biosafety Level 2
Biosafety Level 3
Biosafety Level 4
The Correct Answer is D
A. Biosafety Level 1: This is for non-pathogenic organisms that pose minimal risk, so it is not suitable for highly fatal microbes.
B. Biosafety Level 2: This level is for moderate-risk organisms that may cause disease but have available treatments or preventive measures, which does not apply to untreatable fatal microbes.
C. Biosafety Level 3: This is for serious pathogens that can cause potentially lethal disease but for which treatments or vaccines may exist. It is not the highest level of containment.
D. Biosafety Level 4: BSL-4 is required for handling the most dangerous pathogens, including those with no available treatment or vaccines, such as Ebola and Marburg viruses.
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Related Questions
Correct Answer is B
Explanation
A. budding: During budding, new viral particles exit the host cell gradually without destroying it, but viral synthesis continues during this stage to produce components for new virions.
B. latency: In latency, the virus remains dormant within the host cell with little or no viral synthesis occurring. The genome persists in the host without active replication until reactivated.
C. lytic replication: In the lytic cycle, viral synthesis is highly active, producing viral proteins and genomes that ultimately cause cell lysis and release of new virions.
D. persistent infection: A persistent infection involves continuous viral replication at low levels, so viral synthesis is ongoing, not suspended.
E. oncogenesis: Oncogenesis refers to virus-induced cellular transformation leading to uncontrolled cell growth, but viral synthesis may still continue depending on the virus type.
Correct Answer is A
Explanation
True: Fungi have versatile reproductive strategies. They can reproduce asexually through methods such as budding, fragmentation, and spore formation, which allows rapid population increase. They can also reproduce sexually through the fusion of specialized cells, promoting genetic diversity and adaptation to changing environments.
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