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Enzymes and Application MCQ Questions & Answers

Enzymes and Application MCQs : This section focuses on the "Enzymes and Application". These Multiple Choice Questions (MCQs) should be practiced to improve the Enzymes and Application skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

Enzymes act as antimicrobials

A. by depriving an organism of a necessary metabolite
B. by generating a substances toxic to the organism
C. by attracting a cell wall component
D. All of the above

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Question 2

Milk digestibility is improved by using

A. RNase
B. lactase
C. β-amylase
D. None of the above

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Question 3

Soya off flavour removal may be achieved using

A. di acetyl reductase
B. β- amylase
C. aldehyde oxidase
D. protease

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Question 4

Liquefaction of starch to dextrin is carried out by

A. α-amylase
B. cellulase
C. pectinase
D. All of the above

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Question 5

Milk digestibility is improved by using

A. RNase
B. lactase
C. β-amylase
D. none of these

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Question 6

Lysozyme is naturally present in

A. egg white
B. bacteria
C. tears & milk
D. all of these

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Question 7

β-amylase is

A. endoenzyme
B. exoenzyme
C. saccharifying enzyme
D. both (b) and (c)

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Question 8

Which is true about rennet?

A. It is a mixture of protease chymosin and pepsin
B. It is a mixture of rennin and pepsin
C. Both A and B
D. None of the above

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Question 9

Chymosin hydrolyses the bond between

A. Alanine and glycine
B. Phenyl alanine and methonine
C. Glutamic acid and alanine
D. Alanine and phenyl alanine

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Question 10

Enzymes degrade, alter or synthesize a food component through

A. oxidation/reduction/isomerization
B. hydrolysis/synthesis
C. group transfer
D. All of the above

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Question 11

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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Question 12

Citrus juice debittering can be carried out using

A. limoninase
B. inulinase
C. anthocyanase
D. None of these

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Question 13

Which of the enzyme combination is commercially used for the removal of oxygen?

A. Glucose oxidase-cellulase
B. Glucose oxidase-catalase
C. Glucose oxidase-lactase
D. All of the above

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Question 14

α-amylase is an endo enzyme which requires

A. Ca
B. Cu
C. Mn
D. None of these

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Question 15

Liquefaction of starch to dextrin is carried out by

A. α-amylase
B. cellulase
C. pectinase
D. all of these

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Question 16

The enzyme β-galactosidase is also known as

A. lactase
B. EC3.2.1.23
C. Both A and B
D. isomerase

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Question 17

Lysozyme

A. catalyses hydrolysis of β-1-4 linkages between N-acetyl muranic acid and N-acetyl glucosamine in peptideoglycan
B. catalyses hydrolysis of α-1-4 linkages between N-acetyl muranic acid and N-acetyl glucosamine in peptideoglycan
C. catalyses hydrolysis of α-1-4 linkages between N-diacetyl muranic acid and N-diacetyl glucosamine in peptideoglycan
D. All of the above

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Question 18

Sulphydryl oxidase is used for

A. discoloration
B. clarification of images
C. UHT milk off flavour removal
D. All of the above

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Question 19

Which of the following metallic ion is there in ascorbic acid oxidase?

A. Mg
B. Fe
C. Cu
D. Mn

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Question 20

Sulphydryl oxidase is used for

A. discoloration
B. clarification of images
C. UHT milk off flavour removal
D. all of these

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Question 21

Which of the following mainly serve to convert starch into high fructose corn syrup (HFCS)?

A. α-amylase
B. Gluco-isomerase
C. Gluco-amylase
D. All of the above

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Question 22

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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Question 23

Lysozyme is naturally present in

A. egg white
B. bacteria
C. tears & milk
D. All of the above

View Answer

Question 24

Which is true about rennet?

A. It is a mixture of protease chymosin and pepsin
B. It is a mixture of rennin and pepsin
C. Both (a) and (b)
D. none of the above

View Answer

Question 25

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 the above

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Question 26

Which of the enzyme combination is commercially used for the removal of oxygen?

A. Glucose oxidase-cellulase
B. Glucose oxidase-catalase
C. Glucose oxidase-lactase
D. All of these

View Answer

Question 27

β-amylase is

A. endoenzyme
B. exoenzyme
C. saccharifying enzyme
D. Both B and C

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Question 28

Which of the following mainly serve to convert starch into high fructose corn syrup (HFCS)?

A. α-amylase
B. Gluco-isomerase
C. Gluco-amylase
D. all of these

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Question 29

Citrus juice debittering can be carried out using

A. limoninase
B. inulinase
C. anthocyanase
D. None of the above

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Question 30

Juice clarification extraction is facilitated by using

A. cellulases
B. amylase
C. inulinase
D. lactase

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Question 31

The prosthetic group present in phenolase enzyme is

A. Mg
B. Cu
C. Ca
D. Fe

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Question 32

Hersperidinase is used for

A. juice clarification
B. juice debittering
C. off flavour reduction
D. RNA reduction in fish

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Question 33

The bitter taste of the high protein materials is reduced by using

A. invertase
B. dectinase
C. protease
D. None of the above

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Question 34

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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Question 35

The reduction in off flavour of beer is practiced through

A. hersperidinase
B. rnase
C. invertase
D. diacetyl reductase

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Question 36

Discoloration can be achieved by using

A. sulphloydryl oxidase
B. proteases
C. anthocyanase
D. All of the above

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Question 37

The bitter taste of the high protein materials is reduced by using

A. invertase
B. dectinase
C. protease
D. none of these

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Question 38

Discoloration can be achieved by using

A. sulphloydryl oxidase
B. proteases
C. anthocyanase
D. all of these

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Question 39

The enzyme β-galactosidase is also known as

A. lactase
B. EC3.2.1.23
C. both (a) and (b)
D. isomerase

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Question 40

α-amylase is an endo enzyme which requires

A. Ca
B. Cu
C. Mn
D. None of the above

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Question 41

Trichoderma β-glucanase is reported

A. to stabilize mashing
B. to convert taste fractions of dextrins to fermentable sugars in beer
C. to convert starch to dextrin
D. All of the above

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