🦠 Microbiology Solved MCQs with Answers

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

1927 solved MCQs

Sarcina sickness of beer is caused byAnswer: Pedicoccus cerevisiae The Sarcina sickness of beer, caused by Pedicoccus cerevisiae, is characterized byAnswer: All of these Parsnip like odour and taste in beer is caused byAnswer: Flavobacterium proteus A special beer yeast of the bottom type isAnswer: S. carlsbergensis When the fermentation of fructose results in the bitter product mannitol, the fermentation is sometime termed as-Answer: Mannitic Heavy, thick, slimy film of bacteria in the slow process of vinegar manufacture reducesAnswer: The rate of acetification Which of the following beer is of Japanese origin with an alcohol content of 14 to 17%?Answer: Sake The crushed grapes used for wine manufacturing are also known asAnswer: Must The potential spoilage organism in beer isAnswer: Saccharomyces diastaticus If the mash in the brewhouse is held too long it may undergoAnswer: Both (a) and (b) The spoilage most commonly occurring in wine is tourne which refers toAnswer: Acid formation from sugars, glucose and fructose Gassiness resulting from the liberation of carbon dioxide by hetero fermentative lactics is calledAnswer: Pousse The fermentation of wine can be carried out using the strains ofAnswer: Saccharomyces cerevisiae Acetic acid bacteria spoiling musts and wines are inhibited byAnswer: 14-15% alcohol by volume The micro-organisms causing wine spoilage areAnswer: All of these Most important species of vinegar bacteria causing sliminess isAnswer: Acetobacter aceti Which of the following is not an ale type of beer?Answer: Pilsener S. patorianns can causeAnswer: Cloudiness in beer The process by which phage reproduction is initiated in lysogenized culture is calledAnswer: Induction Area of lysis on a bacterial lawn culture produced by a phage is known asAnswer: Plaque The procapsid is assembled with the aid of __________ proteins.Answer: Scaffolding Which of the following is/are synthesized from late mRNA?Answer: All of the above Which capsid symmetry is exhibited by most of the phages?Answer: Icosahedral Contractile sheath of the tail is present in which of the following phages?Answer: T2 One of the first enzymes synthesized by many bacteriophage is __________ , an RNA-dependent RNA polymerase.Answer: RNA replicase In viruses with envelopesAnswer: The envelope is derived from the host but it contains embedded proteins coded by the viral nucleic acid Which of the following bacteria can be typed by phage typing method?Answer: All of these __________ protein keeps the prophage dormant and prevents virus reproduction.Answer: Repressor __________ is specifically able to have a long-term relationship with the host known as lysogeny.Answer: Temperate virus Which of the following properties is due to lysogenic conversion by phages?Answer: All of the above