Microbiology & Immunity — Part 1: 40 MCQs with Explanations

Ultra Microscopic viruses are the main cause of Mumps .

Virus is acellular .

Tobacco mosaic virus was crystallized by Stanely .

Non-enveloped naked viruses are known as virions .

Gram +ve bacteria on treatment with crystal violet dye give purple colour.

Dr Barry Marshall and dr Robin Warren is the correct answer to “Who discovered the peptic ulcer causing bacteria H.PYLORI”. Items of this type are drawn from the Microbiology & Immunity — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Introduction of vaccine within the body to produce immunity is an example of Artificially induced active immunity .

Which of the following structure primarily helps in attachment of bacteria on various surfaces Pili .

Gram positive bacteria appear Purple .

Which of the following structure provides greater pathogenicity to the bacteria Slime .

Nitrifying bacteria are the examples of Chemosynthetic bacteria .

Those bacteria which are fully dependent upon their host for nutrition are called Parasitic bacteria .

Purple non-sulphur bacteria is an example of Photosynthetic bacteria .

Example of bacteria requiring low concentration of oxygen is Campylobactor .

The common waste material in bacteria is Lactic acid .

Which of the following bacteria do not have flagella commonly Cocci .

Log phase is the correct answer to “Rapid growth at exponential ration occurs in which phase of bacterial growth:”. Items of this type are drawn from the Microbiology & Immunity — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Which of the following bacteria are thick rigid and spiral Spirillum .

Louis Pasteur is the correct answer to “Who developed the vaccine against anthrax”. Items of this type are drawn from the Microbiology & Immunity — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

In bacterial categories the bacteria smaller in number are Ancient bacteria .

Germ theory of disease has 4 postulates.

Some bacteria ranging occasionally a size of 500?m in length are Spirochetes .

The word Archaeobacteria (a division of bacteria) derived from Greek means Ancient bacteria .

Who coined the term Animalcules for microorganisms like Bacteria and protozoa Leeuwenhoek .

Who discovered the bacteria causing tuberculosis and also developed various techniques of media preparation and maintenance of pure culture Leeuwenhoek .

Which of the following statement is incorrect regarding germ theory of diseases postulated by Robert Koch The pure culture cannot produce the disease when inoculated into susceptible animal however the causative organism isolated from pure culture can do so. .

Who first separated bacteria from other protists as a group Herbert Copeland .

The liquid that escapes during defrosting frozen meat contains Salmonella bacteria.

Tobacco mosaic virus is Rod Shaped .

Retrovirus is the correct answer to “Which of the following virus has special affiliations with the tumor production:”. Items of this type are drawn from the Microbiology & Immunity — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

An isolated virus is not considered living since it Can not metabolize .

Polio virus is the correct answer to “Which of the following is the smallest known virus:”. Items of this type are drawn from the Microbiology & Immunity — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

HCV is the correct answer to “For which of the following no preventive vaccine is available”. Items of this type are drawn from the Microbiology & Immunity — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The size of smallest virus is 20 nm .

Viruses are 10 1000 times smaller than bacteria.

Vaccine Was discovered by Edward Jennar .

The word virus is derived from Latin word venome meaning Poisonous Fluid .

The word which E-Chatton suggested for bacteria and blue green algae was Pro-cariotique .

The monosaccharide found in some bacteria and occurring rarely are Tetroses .

Lack membrane bounded organelles is the correct answer to “Mycoplasmas have been included in bacteria because:”. Items of this type are drawn from the Microbiology & Immunity — Part 1 syllabus of Pakistani competitive exams, where the fact is tested verbatim.