Enzymes Quiz (:

Its quiz time again! and i KNOW you are all excited! So lets go!

1. Antibodies with catalytic properties are called?

a) Izoenzymes

b) Holozymes

c) Abzymes

d) Co-factors

e)None of the above

2. Which is an example of inorganic co-factor?

a) Vitamin C

b) Au+

c) Ag+

d) Mg2+

e) Urea

3. The active enzyme is called?

a) Holoenzyme

b) Abzyme

c) Co-factor

d) Actenzyme

e) None of the above

4. What is the catalyst used in the Contact Process?

a) LDH

b) Vanadium (V) oxide

c) Fe

d) SDH

e) Silicon

5. Allosteric enzymes show what type of curve?

a) Sigmoid

b) Symmetrical Curve

c) Hyperbolic Curve

d) It produces a line, not curve

e) None of the above

6. When [S] is much less than km and velocity is proportional to [S], what is the rate of reaction?

a) Zero order

b) First order

c) Second order

d) Third order

e) None of the above

7. What is the competitive inhibitor of Malonate?

a) LDH

b) Succinate Dehydrogenase

c) HCl

d) Urea

e) Malonase

Multiple answer MCQ:

Select one of the correct multiple answer using ONE of the keys A,B,C,D or E as follows:

a)      ONLY 1 is correct

b)      2 and 3 ONLY are correct

c)       All options are correct

d)      1 and 4 ONLY are correct

e)      All except 1 are correct

8. Inhibitor that binds to the enzyme at a site besides active site is called?

1) Competitive

2) Uncompetitive

3) Non Competitive

4) Mixed Competitive

9. Why does allosteric enzymes have more than one active site?

a)  Multiple folding

b) Presence of hydrophobic interactions

c) New active sites form when inhibition occurs

d) Multiple polypeptide chains

e) Gene that produces active sites is mutated

10. What takes part in negative feedback mechanism?

a) Homotrophic effectors

b) Heterotrophic effectors

c) Both Homo trophic and heterotrophic effectors

d) Apoenzymes and Co-factors

e) Only inorganic catalyst



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