🦠 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 may contain fimbriae?Answer: Gram-negative bacteria Peptidoglycan accounts for __________ of the dry weight of cell wall in many gram positive bacteriaAnswer: 50% or more Bacteria having no flagella are unable toAnswer: move Which of the following is true about cell wall of gram-positive bacteria?Answer: All of these The cell walls of many gram positive bacteria can be easily destroyed by the enzyme known asAnswer: lysozyme The cell wall ofAnswer: gram-positive bacteria are thicker than gram-negative bacteria Peptidoglycan is also known asAnswer: murein mucopeptide Genetic system is located in the prokaryotes inAnswer: all of these Which is most likely to be exposed on the surface of a gram-negative bacterium?Answer: Pore protein (porin) The last step in synthesis of peptidoglycan isAnswer: attaching two amino acids to form a cross-link Cytoplasmic inclusions includeAnswer: all of these The cocci which forms a bunch and irregular pattern areAnswer: Staphylococci Chemotaxis is a phenomenon ofAnswer: swimming away or towards of bacteria in presence of chemical compound The structure responsible for motility of bacteria isAnswer: flagella The next to last step in peptidoglycan biosynthesis isAnswer: linking the sugar of the disaccharide-peptide unit to the growing peptidoglycan chain The cocci which forms a chain isAnswer: Streptococci The arrangement, in which flagella are distributed all round the bacterial cell, is known asAnswer: peritrichous Periplasm isAnswer: the area between the inner and outer membranes of gram-negative bacteria Which of the following has peptidoglycan as a major constituent of cell wall?Answer: Gram-positive bacteria The common word for bacteria which are helically curved rods isAnswer: spirilla The bacteria deficient in cell wall isAnswer: Mycoplasma Which of the following is not true about peptidoglycan?Answer: None of the above The common word for bacteria which are spherical in shape isAnswer: cocci Single or clusters of flagella at both poles is known asAnswer: amphitrichous Which of the following bacterial genera (that produces endospore) have medical importance?Answer: Both (a) and (b) Microcapsules are composed ofAnswer: all of these Gram positive cells have aAnswer: multiple layer of peptidoglycan that helps to retain the crystal violet stain The common word for bacteria which are straight rod in shape isAnswer: bacilli A single polar flagella is known asAnswer: monotrichous Teichoic acids are typically found inAnswer: cell walls of gram positive bacteria