E-PolyLearning

46. Which of the staining technique helps in demonstrating spore structure in bacteria as well as free spores?
a. Acid-fast stain
b. Endospore stain
c. Capsule stain
d. Flagella stain
View Answer Report Discuss 50-50!
Answer: (b).Endospore stain

47. In Gram-staining, iodine is used as a______________
a. fixative
b. mordant
c. solublizer
d. stain
View Answer Report Discuss 50-50!
Answer: (b).mordant

48. Which of the following is the example of Gram-negative bacteria?
a. Lactobacillus
b. Eschericia coli
c. Staphylococcus aureus
d. Bacillus subtilis
View Answer Report Discuss 50-50!
Answer: (b).Eschericia coli

49. In which of the following situations will the logarithmic plot of survivors be constant?
a. physiological conditions are different
b. cells of microbial population vary in size
c. age and physiological conditions are uniform
d. temperature conditions are different
View Answer Report Discuss 50-50!
Answer: (c).age and physiological conditions are uniform

50. A suspension of E.coli exposed to a heat treatment may yield a greater number of survivors if a plating medium of _____________ is used.
a. peptone
b. trypticase soy agar
c. deoxycholate agar
d. potato dextrose
View Answer Report Discuss 50-50!
Answer: (b).trypticase soy agar