🦠 Microbiology Solved MCQs with Answers

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

1927 solved MCQs

T-even phage binding to E. coli probably involvesAnswer: Electrostatic interaction The filamentous bacteriopohage infect male E. coli cells by attaching toAnswer: The tip of the pilus A bacterial defense mechanism against bacteriophage is calledAnswer: Restriction Which of the following is the agent associated with the development of neurodegenerative disease in livestock and humans?Answer: Prions __________is probably the most important characteristic for classification of viruses in eukaryotes.Answer: Host preference The __________ of the influenza-enveloped virus appear to be involved in attachment to the host cell receptor site.Answer: Hemagluttinin Intracellular structures formed during many viral infections, called __________ , which can directly disrupt cell structure.Answer: Inclusion bodies Viral RNA is replicated in the host cellAnswer: Cytoplasmic matrix Which family has received most interest in their development as a biological control agent against insects?Answer: Baculoviridae In cancer, the reversion of cells to a more primitive or less differentiated state is calledAnswer: Anaplasia Which of the following has been linked to Kaposi's sarcoma?Answer: Human herpes virus 8 Virulent and nonvirulent viruses may notAnswer: degrade host cell DNA The hepadnaviruses such as hepatitis B virus are quite different from other DNA viruses with respect to genome replication. These replicate their DNA usingAnswer: reverse transcriptase Which of the following virus is always detectable after infections?Answer: Hepatitis B virus Viroids are composed ofAnswer: single-stranded RNA The chief spoilage organisms on smoked fish areAnswer: Molds A musty or muddy odor of the fish is attributed toAnswer: The growth of Streptomyces species in the mud at the bottom of the body of water In chilled shrimp __________ is chiefly responsible for spoilage.Answer: Achromobacter Marinated (sour pickled) fish should not have spoilage problems unlessAnswer: The acid content is low enough The predominant kind of bacteria causing spoilage in fish at chilling temperature isAnswer: Species of Pseudomonas The bacteria most often involved in the spoilage of fish areAnswer: Part of the natural flora of the external slime of fishes and their intestinal contents The red or pink color of the fish is generally caused from the growth ofAnswer: All of these At higher temperatures, the souring of Oysters may be the result of the fermentation of sugars byAnswer: All of the above Normally, due to the holding of the chilled fishAnswer: All of the above Dialysis is a medical treatment used for _____?Answer: Renal Failure Animal viruses with capsids displaying helical symmetry includeAnswer: All of these Icosahedral viruses are generallyAnswer: Both Negative strand ssRNA viruses need to have a preformed replicase when they invade a mammalian cell because theyAnswer: Have to make a positive strand copy that can be translated Which of the following reflects the correct order of events that take place during the multiplication of a virus?Answer: Attachment, penetration, biosynthesis, maturation, release What can be coated to the plastic dish if an ELISA is performed to directly detect polio virus?Answer: Anti-polio antibody