🦠 Microbiology Solved MCQs with Answers

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

1927 solved MCQs

The number of flagella produced by motile cells inAnswer: Members of the Phaeophyta is greater than members of the Rhodophyta Algae are classified into 6 groups, technically known asAnswer: Divisions The __________ is the vegetative body of algae.Answer: Thallus Agar, which is the solidifying agent in many bacterial culture media, is part of the cell wall ofAnswer: Rhodophyta The kelps are algae found inAnswer: Phaeophyta Frustules made of silica are characteristic ofAnswer: Diatoms Algae are found in all of the following places exceptAnswer: Soils Which of the following best describes the algae known as diatoms?Answer: Cells have intricate shells of silicon dioxide with two halves Chrysolaminarin is an energy storage material characteristic ofAnswer: Chrysophyta Which of the following disinfectant is effective against viruses?Answer: All of these Viruses largely lack metabolic machinery of their own to generate energy or to synthesizeAnswer: Protein Viruses require __________ for growth.Answer: Living cells Reverse transcriptase is a useful enzyme to have whenAnswer: An RNA virus converts its RNA to DNA When a virus enters a cell but does not replicate immediately, the situation is calledAnswer: Lysogeny Usually viruses are separated into several large groups based primarily onAnswer: Nature of the host The first step in infection of a host bacterial cells by a phage isAnswer: Adsorption Which of the following viruses has not been associated with human cancer?Answer: Varicella-Zoster virus The viral nucleocapsid is the combination ofAnswer: Genome and capsid Edward Jenner began inoculating humans with material from __________ lesions.Answer: Cowpox The viruses in an attenuated vaccineAnswer: Continue to replicate Enveloped viruses have a __________ shape.Answer: Roughly spherical The envelope of which of the following viruses is derived from the host cell nucleus?Answer: Herpesviruses Which of the following is semi-continuous (diploid) cell line?Answer: WI-38 Plant viruses may be cultivated inAnswer: All of these The oncogene theory refers toAnswer: How viruses transform normal cells into tumor cells In cell culture, measles virus may lead toAnswer: Syncytium formation A change from lysogeny to lysis is generally induced byAnswer: Ultraviolet light The viral DNA is removed from the host's chromosomes and the lytic cycle occurs. The process is calledAnswer: Spontaneous induction The lysogenic state is governed by the activity of the regulatory region of the lambda phage genomes; this region is termed asAnswer: immunity operon The capsomeres consist of a number of proteins subunits or molecules calledAnswer: Protomers