Which step causes activation of catalytic site of an enzyme__________________?

Related Mcqs:

1. In life cycle of bacteriophage which step occur after attachment of prophage with the receptor site of the bacterial cell wall_____________?

   A. Absorption
   B. Multiplication
   C. Lysogeny
   D. Penetration

2. Enzymes __________________ the activation energy of a chemical reaction?

   A. Increases
   B. Decreases
   C. Does not effect
   D. Increases or decreases depending upon individual enzyme

3. 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

4. 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

5. 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

6. 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_______________?

   A. Co-enzyme
   B. Blocker
   C. Inhibitor
   D. Cofactor

7. Attachment of the bacteriophage with the receptor site on the bacterial cell wall involves_______________?

   A. Strong covalent bond between virion and the receptor site.
   B. Week chemical unior between them
   C. Both A and B depending upon the phage
   D. None of these

8. Active site of Rubisco is evolved to bind?

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

    

9. The site/s where most of the uptake of water and minerals take place is/are__________?

   A. Root hairs
   B. Root cells
   C. Underground stem
   D. All of these

10. On which of the following site the posterior pituitary hormone acts predominantly?

    A. Proximal convoluted tubule
    B. Descending limb of loop of Henle
    C. Ascending limb of loop of Henle
    D. Collecting tubules