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Enzymes with two sites are called...

Enzymes with two sites are called

A

apoenzyme

B

allosteric enzyme

C

holoenzyme

D

conjugate enzyme

Text Solution

Verified by Experts

The correct Answer is:
B
Enzymes with two active sites are called allosteric enzymes. One of these sites is the catalytic site for the concerned reaction. Other site may be the site for inhibition of catalysis by enzymes or to activate the enzyme further.
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Enzymes, which catalyse the transfer of hydrogen (H) between two substrates, are called :

Drugs which inhibit the attachment of substrate on active site of enzymers by binding to allosteric site are called

Assertion : Enzymes have active sites and substrates reactive sites, on their surfaces respectively. Reason : Active and reactive sites push the enzyme and substrate molecules away from each other.

Assertion (A) Enzymes have active sites that hold substrte molecule for a chemical reaction. Reason (R) Drugs compete with natural substrate by attaching convalency to the active site of enzyme.

Enzymes functional in cells are called

Regulatory sites present over the enzymes are called

Drugs which compete with natural substrate for their attachment on the active sites of enzymes are called

Knowledge Check

  • Enzymes, which catalyse the transfer of hydrogen (H) between two substrates, are called :

    A
    Transferases
    B
    Oxidoreductases
    C
    Isomerases
    D
    Hydrolases

  • The enzymes which have control site in addition to active site are called

    A
    holoenzymes
    B
    coenzymes
    C
    apoenzymes
    D
    allosteric enzymes

  • Drugs which inhibit the attachment of substrate on active site of enzymers by binding to allosteric site are called

    A
    Enzyme inhibitors
    B
    Noncompetitive inhibitors
    C
    Both (1) and (2)
    D
    Competitive inhibitors