Q.1
Which of the following is not true for immobilized lactases?
  • a) Product inhibition by galactose
  • b) Unwanted oligosaccharide formation
  • c) Microbial contamination
  • d) Batch variability problems of acid hydrolysis
Q.2
Production of DE glucose syrup using glucoamylase has shortcomings as an object of commerce.
  • a) True
  • b) False
Q.3
Glucose is converted to fructose by _________ enzyme.
  • a) lactase
  • b) phosphorylase
  • c) glucose isomerase
  • d) raffinase
Q.4
What does ‘X’ represent in the following reaction?
  • a) Lactase
  • b) Invertase
  • c) Phosphorylase
  • d) Raffinase
Q.5
_____________ isomerizes α-D-glucopyranose to α-D –fructofuranose.
  • a) Xylose isomerase
  • b) Glucose isomerase
  • c) Sucrose phosphorylase
  • d) Invertase
Q.6
Which of the following organism is capable of producing raffinase, but not invertase.
  • a) Yeast
  • b) Mortierella vinacea
  • c) Bacillus acidopullulyticus
  • d) Kluyveromyces lactis
Q.7
____________ is stirred with sugar beet juice in batch stirred tank reactors to remove raffinose.
  • a) Kluyveromyces lactis
  • b) Bacillus Licheniformis
  • c) Mortierella vinacea
  • d) Bacillus acidopullulyticus
Q.8
Immobilized __________ is used to remove the raffinose and stachyose from soybean milk.
  • a) raffinase
  • b) xylose isomerase
  • c) invertase
  • d) papain
Q.9
Which one of the following is not a step in production of glucose syrups using invertase?
  • a) Yeast cells were autolyzed
  • b) Filtration through a bed of calcium sulphate
  • c) Adsorption into bone char
  • d) Galactose released is destroyed by alkaline conditions
Q.10
A productivity oftons of inverted syrup may be achieved using one liter of the granular enzyme.
  • a) True
  • b) False
Q.11
Immobilized ______________ is used in the treatment of whey.
  • a) raffinase
  • b) lactase
  • c) invertase
  • d) rennet
Q.12
Which of the following immobilized organism is not used to produce lactases?
  • a) Kluyveromyces lactis
  • b) Mortierella vinacea
  • c) Aspergillus Niger
  • d) Aspergillus Oryzae
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