15. Which of the following metallic ion is there in ascorbic acid oxidase?
A.Mg
B.Fe
C.Cu
D.Mn

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16. Which of the enzyme combination is commercially used for the removal of oxygen?
A.A. Glucose oxidase-cellulase
B.Glucose oxidase-catalase
C.Glucose oxidase-lactase
D.All of these

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17. The enzyme used to reduce bitterness of grapes commonly contains
A.α-L-rhamonosidase
B.β-d-glucosidase
C.β- galactosidase
D.both (a) and (b)

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18. Citrus juice debittering can be carried out using
A.limoninase
B.inulinase
C.anthocyanase
D.None of these

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19. Which of the following enzyme is responsible for causing vitamin B deficiency disease beriberi?
A.Ascorbic acid oxidase
B.Thiaminase
C.Lipoxygenase
D.None of these

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20. Soya off flavour removal may be achieved using
A.di acetyl reductase
B.β- amylase
C.aldehyde oxidase
D.protease

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21. The reduction in off flavour of beer is practiced through
A.hersperidinase
B.rnase
C.invertase
D.diacetyl reductase

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