1. Comparing bacterial exotoxins and endotoxins, which of the following is false
ID: 195996 • Letter: 1
Question
1. Comparing bacterial exotoxins and endotoxins, which of the following is false? A. Exotoxins are more potent (lower LDso) than endotoxins B. Both exotoxins and endotoxins have been converted to toxoids and are used for vaccines today C. Exotoxins are proteins D. Endotoxins are lipopolysaccharides (LPS) E. Endotoxins only G-bacteria, whereas exotoxins may be produced by G+ & G-bacteria. 2. Concerning Biotechnology, which of the following is fabse A. "Ancient biotechnology" or wine and bread making has been practiced over 1000 years and depends on the activities of the yeast Candida albicans B. Industrial Microbiology involves large scale fermentors with special control of growth parameters C. Lactic acid bacteria are used in cheese and yogurt production, sauerkraut, pickles and production of dry and semidry sausages D. New Biotechnology (genetic engineering) was facilitated by restriction endonucleases PCR and other microbiological "tools E. Human insulin, blood clotting factors (for hemophilia), etc are produced by microbes Examples of innate host defenses are all of the following except A. lysozyme in tears and secretions and the muco-ciliary escalator B. normal microbiota. C. D, E. All of the above are innate host defences 3. cells like neutrophils and macrophages intact skin and mucous membranes 4. Concerning protozoans, which of the following is fabse? A. Malaria is caused by different Plasmodium species B. C. Malaria is transmitted by female Anopheles mosquitoes Dysentery is a synonym for maltiple loose stools or diarrbea D. Amoebic dysentery is caused by Entamoeba histolyrica E. Giardia lamblia is a water-borne cause of acute or chromic smelly diarrhea. 5. Which of the following characteristics of the 3 domains of living things (which all have characteristic) exclude viruses, viroids and prions? A. proteins B. ribosomes C. mitochondria D. nucleic acid E. mitosisExplanation / Answer
Question 1.
Answer. B
Explaination : Endotoxins are not coverted to Toxoid.
Question 2.
Answer. A
Explaination : The main yeast species used in wine and bread making is Saccharomyces cerevisiae.
Question 3.
Answer. B
Question 4.
Answer. C
Question 5.
Answer. C
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