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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
Microorganisms and Disease
Milk and Milk Products
Miscellaneous Foods
Mycobacterium
Nucleic Acid Structure
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⇒ Physical and chemical agents
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 disinfectants act by disrupting microbial membranes? Cationic detergents [other wrong options] [Discuss in forum] Halogens Heavy metals Aldehydes |
Q22 ⇒ Preservation of foods by using salts and sugars works by creating a hypertonic environment [other wrong options] [Discuss in forum] raising pH lowering osmotic pressure creating a hypotonic environment |
Q23 ⇒ Which of the following describes the effect of ionizing radiation on microbes? Induces electrons and protons to jump out of the molecules of the microbe [other wrong options] [Discuss in forum] Changes the 3-dimensional structure of proteins to a 2-dimen-sional form Substantially decreases enzymatic activity, slowing microbial reproduction None of the above |
Q24 ⇒ Which of the following is bactericidal? Ionizing radiation [other wrong options] [Discuss in forum] Membrane filtration Freeze-drying Deep freezing |
Q25 ⇒ The lowest temperature that kills all microorganisms in a liquid suspension in 10 minutes is known as the thermal death point [other wrong options] [Discuss in forum] decimal reduction time thermal death temperature thermal death time |
Q26 ⇒ Which of the following compounds are commonly used as general antiseptics to treat cuts and scratches? Halogens [other wrong options] [Discuss in forum] Aldehydes Ethylene oxide None of these |
Q27 ⇒ Which of the following is best to sterilize heat labile solutions? Membrane filtration [other wrong options] [Discuss in forum] Dry heat Autoclave Pasteurization |
Q28 ⇒ Which of the following items could be sterilized by dry heat sterilization? Glass pipettes [other wrong options] [Discuss in forum] Intravenous (IV) solution Plastic IV bags rubber gloves |
Q29 ⇒ The process of making an object free from living organisms including bacterial and fungal spores and viruses is known as sterilization [other wrong options] [Discuss in forum] pasteurization antisepsis disinfection |
Q30 ⇒ Which of the following process can be efficiently carried out by incineration? Destruction of contaminated materials [other wrong options] [Discuss in forum] Sterilization of scalpel blades and needles Sterilization of all glass syringes Sterilization of points of forceps |
Q31 ⇒ Which of the following tests is designed to simulate the natural conditions under which the disinfectants are used in hospitals? Capacity test [other wrong options] [Discuss in forum] Phenol coefficient test Minimum inhibitory concentration test None of these |
Q32 ⇒ Complete destruction of the microorganisms is commonly known as antisepsis [other wrong options] [Discuss in forum] disinfection sterilization none of these |
Q33 ⇒ Which disinfectant would be most effective against Staphylococcus found in a blood spill? None of these [other wrong options] [Discuss in forum] Phenol Cetylpyridinium chloride Hexachlorophene |
Q34 ⇒ Which of the following is most effective for sterilizing mattresses and plastic petri plates? Ethylene oxide [other wrong options] [Discuss in forum] Chlorine Glutaraldehyde Ultraviolet radiation |
Q35 ⇒ Which of the following was the first widely used antiseptic and disinfectant? Phenol [other wrong options] [Discuss in forum] Chlorine Iodine Alcohol |
Q36 ⇒ The time in minutes at a specific temperature needed to kill a population of cells is the F value [other wrong options] [Discuss in forum] decimal reduction time thermal death point thermal death temperature |
Q37 ⇒ Which of the following is/are vapour-phase disinfectant/s? Both (a) and (b) [other wrong options] [Discuss in forum] Formaldehyde Ethylene oxide None of these |
Q38 ⇒ Which of the following articles can be sterilized in an autoclave? All of these [other wrong options] [Discuss in forum] Gloves Culture media Dressing material |
Q39 ⇒ Milk is pasteurized in batch method by keeping it at 63°C for 30 minutes [other wrong options] [Discuss in forum] 72°C for 60 seconds 73°C for 30 minutes 72°C for 6 minutes |
Q40 ⇒ Which of the following is not a disinfectant containing a heavy metal? Chlorine [other wrong options] [Discuss in forum] Silver nitrate Mercurochrome Copper sulfate |
Or |