Quiz 19. Biomolecules

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It includes Cofactors Part 1

Name of student *

1 point

In several enzymes, non protein part may also be present for enzymatic activity. Out of these options which is protein part *

1 point

Cofactors

Prosthetic group

Coenzyme

Apoenzyme

There are a number of cases in which non-protein constituents called ............. are bound to the the enzyme to make the enzyme catalytically active.
*

1 point

Coenzymes

Prosthetic group

Cofactors

Apoenzyme

Find which is incorrect statement regarding prosthetic group..? *

1 point

It is organic compound

It is tightly bound to apoenzymes

Haem is the prosthetic group in peroxidase and catalse enzymes

Haem is part of active site of enzyme

All are correct

Coenzyme is .... *

1 point

Inorganic compound

Organic compound

Tightly bound to apoenzyme

It is a metal

Find incorrect statement ... *

1 point

Catalytic activity is lost when the co-factor is removed from the enzyme

Zinc is a cofactor for the proteolytic enzyme carboxypeptidase

Association of coenzyme with apoenzyme is only transient

Peroxidase and catalase, catalyze the breakdown of hydrogen peroxide to H₂O and CO₂

All are correct

When cofactor is removed from enzymes then enzymes activity is .... *

1 point

Reduced

Lost

Incresed

Dont change

Vitamin niacin function as cofactors in .... *

1 point

NAD

NADP

Both of these

None of these

Which of the following is correct *

1 point

Apoenzyme = Holoenzyme + cofactor

Apoenzyme + Holoenzyme = cofactor

Holoenzyme = cofactor + apoenzyme

Coenzyme = apoenzyme + cofactor

Essential chemical component of many coenzyme are *

1 point

Protein

DNA

RNA

Vitamin

An organic compound is bound to enzyme and essential for enzyme activity is called *

1 point

Apoenzyme

Coenzyme

Holoenzyme

Isoenzyme

Match both column correctly *

4 points

Prosthetic group

Vitamin

Protein

Cofactor of carboxypeptidase

Apoenzyme

Zinc metal

Haem

Niacin

Which of these is not cofactor .... *

1 point

Coenzyme

Metal

Apoenzyme

Prosthetic group

The cofactor present in catalase and peroxidase is *

1 point

Zinc

Haem

Niacin

NAD

Which of the organic compound is bound to enzyme only transiently *

1 point

Coenzyme

Prosthetic group

Apoenzyme

Holoenzyme

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