🦠 Microbiology Solved MCQs with Answers

Practice 1927 approved 🦠 Microbiology questions with verified answers from the 🧬 Medical Science subject for Pakistan exams.

1927 solved MCQs

Which of the following toxin resembles cholera toxin?Answer: Labile toxin of Escherichia coli Which of the following viral infections is associated with the development of hydrophobia?Answer: Rabies Which of the following viruses is star-shaped in outline and transmitted by the faecal-oral route?Answer: Astrovirus What is the shape of rabies virus?Answer: Bullet-shaped The species of animals which is most susceptible to rabies infection isAnswer: Cat Which of the following clinical specimens can be used for the demonstration of rabies antigen by direct immunofluorescence antemortem?Answer: All of these The mode of transmission of hepatitis E is throughAnswer: Faecally contaminated drinking water Which of the following viral agents can cause diarrhea?Answer: All of these The virus(es) which has club-shaped peplomers and infects the respiratory tract is/areAnswer: Coronavirus ' The technique first described to determine the incipient spoilage in meat wasAnswer: Extract Release Volume (ERV) Which of the following is responsible for a musty or earthy flavor?Answer: Actinomycetes Molds causing spoilage of eggs include species ofAnswer: All of these Vacuum packaged meats are spoiled byAnswer: Both (a) and (b) More spoilage of eggs is caused byAnswer: Bacteria than molds The growth of Streptomyces on straw or elsewhere near the egg may produceAnswer: Musty or earthy flavors Unopened, sliced bacon, packaged in material somewhat highly resistant to oxygen permeability, is spoiled mostly byAnswer: Lactobacilli Pink rots in eggs is caused by the strains ofAnswer: Pseudomonas Beef hams are made spongy by species ofAnswer: Bacillus The red color of meat, called its bloom, may be changed to shades of green, brown or grey as a result of production of oxidizing compounds by bacteria. Which of the following species are reported to cause the greening of sausage?Answer: Both (a) and (b) Yellow discolorations in meat are caused by bacteria with yellow pigments, usually species ofAnswer: Both (a) and (b) Which of the following (s) is/are responsible for the green patches on the surface of meats under aerobic conditions?Answer: All of these Which of the following microorganisms grow in beef at a temperature of 15°C and above?Answer: Both (a) and (b) Green rots in eggs is chiefly caused byAnswer: Pseudomonas fluorescens Black rots in eggs is most commonly caused byAnswer: Species of Proteus In storage atmospheres of high humidity variety of molds may causeAnswer: Superficial fungal spoilage Which of the following microorganism spoil poultry in polyethylene bags?Answer: Pseudomonas-achromobacter Black spot in meat are produced mainly byAnswer: Cladosporium Which of the cause(s) has/have been suggested for the chill rings in sausage?Answer: All of these Lactic acid bacteria in meats may be responsible forAnswer: All of these Colorless rots in eggs is caused byAnswer: Pseudomonas alcaligenes