MPPSC Scientific Officer Microbiology Paper 2013

MPPSC Scientific Officer Microbiology Paper 2013

Vitamin B12 is produced from
(a) Pseudomonas denitrificans
(b) Bacillus coagulens
(c) Propionibacterium freudenreichii
(d) All of the above

Bacterial cell mass is measured in terms of
(a) Absorbancy
(b) Intensity of light falling on suspension
(c) Optical darkness
(d) None of the above

Wide range of wavelength can be used in
(a) Nephalometer
(b) Spectrophotometer
(c) Lavibond comparator
(d) Colorimeter with four filters

In which of the chromatography mobile phase is liquid and stationary phase is solid ?
(a) TLC
(b) Paper chromatography
(c) Gel filtration chromatography
(d) All of the above

Chromatography involves
(a) Loading of sample on stationary phase
(b) Separation by moving phase
(c) Elution of the separted component
(d) All of the above

In thin layer chromatography
(a) Glass plate and silica gel is used
(b) Wattman paper is used
(c) Solvent column is used
(d) None of the above

Sauerkraut is a fermented food prepared from
(a) Pineapple
(b) Cabbage
(c) Olives
(d) Cucumbers

Which of the following is single cell protein ?
(a) Spirulina
(b) Yeast
(c) Scendesmus
(d) All of these

Spectrocolorimeter is based on
(a) Beer-Lambert’s Law
(b) Newton’s Law
(c) Dalton’s Law
(d) None of the above

Electronmagnetic lenses are used in
(a) Fluorescence microscope
(b) Electron microscope
(c) Compound microscope
(d) None of the above

Annular plate and diaphragm is found in
(a) Dissecting microscope
(b) Sterioscopic microscope
(c) Phase-contrast microscope
(d) None of the above

Which of the following is a good food preservative ?
(a) Potassium metabisulphate
(b) Magnesium carbonate
(c) Formadehyde
(d) None of the above

The milk is rendered safe by high temperature exposure for short time, then process is knwon as
(a) Purification
(b) Putrification
(c) Pasteurization
(d) Fermentation

Yoghurt is also termed as
(a) Sour milk
(b) Ordinary curd
(c) Bulgarian milk
(d) Swiss milk

By which test microbial limit of milk is judged ?
(a) Fat test
(b) Widal test
(c) MBR test
(d) None of the above