Q. Which of the following is a rich source of B vitamins? Yeast extractBeef extractPeptoneAgar Answer: Yeast extract

Q. Which of the following is a characteristic of beef extract? aqueous extract of lean beef tissueaqueous extract of yeast cellscomplex carbohydrate obtained from certain marine algaeproduct resulting from the digestion of proteinaceous materials Answer: aqueous extract of lean beef tissue

Q. What is the temperature of liquid nitrogen? 196 degree C150 degree C0 degree CNone Of The Above Answer: -196 degree C

Q. Which of the following are not performed in lyophilization? bacterial sample is dehydratedcell suspension is frozen at -60 degree to -78 degree Cvials are connected to high-vacuum lineagar slant is covered with mineral oil Answer: agar slant is covered with mineral oil

Q. Which of the following method can be used to determine the number of bacteria quantitatively? Pour-plate and spread plateStreak-plateSpread-platePour plate Answer: Pour-plate and spread plate

Q. In pour-plate method,the medium should be maintained at what temperature? 67 degree C37 degree C0 degree C45 degree C Answer: 45 degree C

Q. Which of the following disease is best diagnosed by serologic means? Q FeverActinomycosisPulmonary tuberculosisGonorrhea Answer: Q Fever

Q. Each of the following agents is a recognized cause of diarrhea except Enterococcus faecalisEscherichia coliClostridium perfringensVibrio cholerae Answer: Enterococcus faecalis

Q. A 30 year old woman has non-bloody diarrhea for the past 14 hours. Which one of the to following organisms is least likely to cause this illness? Salmonella enteritidisClostridium difficileStreptococcus pyogensnone of the above Answer: Streptococcus pyogens

Q. Each of the following organisms is an important cause of urinary tract infections except: Bacteriodes fragilisKlebsiella pneumoniaeProteus mirabilisNone Of These Answer: Bacteriodes fragilis