Lec4

Question 1

is essential for preventing the contamination with any undesired microorganisms.

Answer 1

Sterilisation

Question 2

Air is sterilised by

Answer 2

Membrane filtration

Question 3

Many industrial fermentation are carried out under

Answer 3

aerobic conditions

Question 4

OptimumPh of yeast

Answer 4

4-5

Question 5

contamination of culture is higher in batch than fed-batch culture technique
T/F?

Answer 5

F, fed-batch

Question 6

fresh sterile medium is added continuously in the vessel and used up media with bacterial culture is removed continuously at the same rate

Answer 6

Continuous culture technique

Question 7

This process is widely used for yeast separation during alcohol production and in waste-water treatment.

Answer 7

Sedimentation

Question 8

This process allows small particles or cells to separate from liquid

Answer 8

Centrifugation

Question 9

is useful for Gram-positive organisms but addition of EDTA improves the effectiveness of lysozyme of Gram-negative bacteria.

Answer 9

Lysozyme