A chemical substance which can react (in place of substrate) with the enzyme but is not transformed into product/s and thus blocks the active site temporarily or permanently is called_______________?

Related Mcqs:

1. A chemical substance that reacts with enzyme but is not transformed into product and thus blocking active site is called__________?

   A. Substrate
   B. Co-factor
   C. Inhibitor
   D. Promotor

2. A substance which binds at the active site of the enzyme but does not result in the formation of the products is called________________?

   A. Irreversible inhibitor
   B. Reversible inhibitor
   C. Competitive inhibitor
   D. Non-competitive inhibitor

3. A three dimensional dcavity bearing a specific charge by which the enzyme reacts with its substrate is called_________________?

   A. Active site
   B. Binding site
   C. Catalytic site
   D. Allosteric site

4. If more substrate to already occurring enzymatic reaction is added more enzyme activity is seen because_____________?

   A. There is probably more substrate present than there is enzyme.
   B. There is probably more enzayme available than there is substrate.
   C. There is probably more product present than there is either substrate or enzyme.
   D. The enzyme substrate complex is probably failing to form during the reaction

5. If the concentration of enzyme is kept constant and amount of substrate is increased a point is reached where increase in substrates concentration does not affect the reaction rate because of____________________?

   A. Enzymes get denatured at higher substrate conc
   B. Rate of reaction is indirectly proportional to substrate concentration at this point
   C. All the active sites on enzyme molecule are occupied
   D. None of these

6. If enzyme concentration is low than substrate pH and temperature values are equal to requirement then which of the following will increase rate of reaction____________________?

   A. increase in concentration of enzyme
   B. increase in concentration of substrate
   C. increase in pH
   D. increase in temperature

7. An activated enzyme consisting of polypeptide chain and a cofactor is called_______________?

   A. Apoenzyme
   B. Holoenzyme
   C. Activated enzyme
   D. Both b and c

8. The active site of an enzyme______________?

   A. Never changes
   B. Forms no chemical bond with substrate
   C. Determined by structure and the specificity of the enzyme
   D. They are non specific in their action

9. Active site of Rubisco is evolved to bind?

   A. CO2
   B. O2
   C. H2O
   D. All of these

    

10. If more substrate to already occurring enzymatic reaction is added and there is no effect on the rate of the reaction what is the form given to this situation___________?

    A. Saturation
    B. Denaturation
    C. Composition
    D. Inhibition