Please answer 1-7 Based on LD50 values, which of these is the most toxic/lethal? Botulinum toxin: LD50=0.03 ng/kg Shiga...

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Biology

Please answer 1-7
Based on LD₅₀ values, which of these is the mosttoxic/lethal?
Botulinum toxin: LD₅₀=0.03 ng/kg
Shiga toxin: LD₅₀=250 ng/kg
Staphylococcal enterotoxin: LD₅₀=1350 ng/kg
Abrin toxin: LD₅₀= 20,000 ng/kg
Which of the following is not a communicable disease?
malaria
HIV / AIDS
tetanus
tuberculosis
Which of these best defines pathogenesis?
the abnormal state in which the body is not functioningnormally
the origin and development of a specific disease
the study of strictly bacterial diseases
the study strictly viral diseases
The LAL (Limulus amebocyte lysate) assay is used todetect the presence of .
exotoxins
endotoxins Â Â
fungal pathogens
helminthes
Live microbes that are applied to or ingested into the humanbody to exert a beneficial effect are defined as_______.
antibioticsÂ Â Â Â Â Â Â Â Â Â Â
prebioticsÂ Â Â Â Â Â Â Â Â Â Â Â
probioticsÂ Â Â Â Â
none of these
Where does B cell differentiation take place in adulthumans?
bone marrow
thymus
heart
none of the above
1.
Which of the following definitions isincorrect?
acute: a short-lasting primary infection
chronic: a disease that develops slowly andlasts for a long period of time
primary infection: an initial illness
secondary infection: are always a long-lastingillness

Answer & Explanation Solved by verified expert

3.7 Ratings (419 Votes)

Answer 1 The median lethal dose or LD50 is the amount of the substance required usually per body weight to kill 50 of the test population In general the smaller the LD50 value the more toxic the chemical is Botulinum toxin has LD50 value 003 ngkg which is less than other three shiga toxin Staphylococcal enterotoxin and abrin toxin So most lethal is botulinum toxin So correct option is a Answer 2 A communicable disease is one See Answer

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		acute: a short-lasting primary infection
		chronic: a disease that develops slowly andlasts for a long period of time
		primary infection: an initial illness
		secondary infection: are always a long-lastingillness

		Botulinum toxin: LD₅₀=0.03 ng/kg
		Shiga toxin: LD₅₀=250 ng/kg
		Staphylococcal enterotoxin: LD₅₀=1350 ng/kg
		Abrin toxin: LD₅₀= 20,000 ng/kg

		the abnormal state in which the body is not functioningnormally
		the origin and development of a specific disease
		the study of strictly bacterial diseases
		the study strictly viral diseases

		antibioticsÂ Â Â Â Â Â Â Â Â Â Â
		prebioticsÂ Â Â Â Â Â Â Â Â Â Â Â
		probioticsÂ Â Â Â Â
		none of these