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Actinomycetes & Non Sporing Anaero.
Algae
Antibody
Antigen Antibody Reaction
Antimicrobial Chemotherapeutic Agent
Bacillus
Bacteria
Bacteria Morphology
Bacteriophages
Brucella
Cell Cultivations
Cell Cultures and Characteristics
Clostridium
DNA Replication
DNA Sequencing, Mutation and Repair
Energy Release and Conservation
Enzyme Reaction
Enzymes Regulation
Fish and Sea Foods
Food Illness
Fruits and Vegetables
Fungi - Molds and Yeasts
Growth and Nutrition of Bacteria
Heated Canned Foods
Hepatitis Viruses
Identification of Bacteria
Immune Response
Immune System
Industrially Useful Microbial Processes
Micro Organisms
Microbes in Aquatic Environment
Microbial Genetics
Microbial Metabolism
Microbial Recomb. & Gene Transfer
Microbiology of Foods
Microbiology of Soils
Microbiology of Waste Water
Milk and Milk Products
Miscellaneous Foods
Mycobacterium
Nucleic Acid Structure
Physical and Chemical Agents
Polymerase Chain Reaction
Poultry, Egg and Meat
Poxviridae and Picronaviridae
Protozon
Pseudomonas and Burkholderia
Retroviridae
Rhabdoviridae, Caliciviridae & Astrovi.
Sauerkraut and Pickles
Spirochacter and Enterobacteriaceac
Staplylococcus
Streptococcus
Transcription
Translation and Regulation
Vibrio, Aeromonas and Plesiomonas
Viruses
Viruses From Animal and Plants
Viruses in Eukaryotes
Wine and Beer
Home⇒ Medical Science⇒ Microbiology⇒ Microorganisms and disease
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ Which of the following is common in the disease caused by Coryne-bacterium diphtheriae and Bacillus anthracis? The most serious disease symptoms are the direct result of toxin action [other wrong options] [Discuss in forum] Both organisms are gram-positive spore formers Diphtheria toxin and edema toxin are ADP ribosylating toxins Both organisms cause skin and respiratory tract infections |
Q22 ⇒ Which is not a major defense mechanism in the stomach? Dense normal flora [other wrong options] [Discuss in forum] Proteolytic enzymes Low pH All of these |
Q23 ⇒ An important host defense of human beings is a dense resident microbiota associated with vagina [other wrong options] [Discuss in forum] lungs bladder uterus |
Q24 ⇒ Which of the following characteristic of the Rotavirus was important for the construction of the Rotashield vaccine? The possession of a segmented RNA genome [other wrong options] [Discuss in forum] A limited number of capsule types The ability of monkey Rotavirus strains to cause serious illness (diarrhea) in human beings The ability of the Rotavirus to be transmitted faster |
Q25 ⇒ Type III secretion systems are used to inject "effector" proteins directly into a host cell. Salmonella uses a type III secretion system to help the pathogen to survive within macrophages [other wrong options] [Discuss in forum] survive the acid pH of the stomach secrete LT (heat labile toxin) and ST (heat stable toxin) into the lumen of the intestine activate T cells to proliferate and secrete cytokines |
Q26 ⇒ The toxins produced by bacteria interfere with physiological processes in the body [other wrong options] [Discuss in forum] kill viruses encourage bacterial reproduction all of the above |
Q27 ⇒ Which of the following statements is not true regarding Mycobacterium tuberculosis and/or the disease it causes? Antibodies to the pathogen are protective [other wrong options] [Discuss in forum] The pathogen contains mycolic acid in its cell wall The pathogen can live inside macrophages None of these |
Q28 ⇒ The "A" subunit of diphtheria toxin cause ADP ribosylation of a factor involved in protein synthesis [other wrong options] [Discuss in forum] binds host cell receptors found on heart cells forms cAMP that leads to fluid accumulation lysis macrophages with the release of cytokines |
Q29 ⇒ In the human disease cholera, what is it that actually ends up killing the victim? Dehydration and loss of nutrients [other wrong options] [Discuss in forum] Faulty carrier proteins Too little water in the food stream the toxin produced by the bacterium |
Q30 ⇒ The influenza vaccine is administered each year because mutations in the viral hemagglutinin may allow the virus to evade the immune response elicited by previous vaccines [other wrong options] [Discuss in forum] it is a polysaccharide vaccine that does not confer long-term protection the vaccine is sufficiently toxic to make it necessary to administer only a small amount at any one time none of the above |
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