Which soluble protein is always present in human blood plasma?
Pepsin
Fibrinogen
Thrombin
Amylase
Modern detergents contain enzyme preparation of:
acidophiles
alkaliphiles
thermoacidophiles
thermphiles
Hydrolytic enzymes which act at low pH are called as:
Proteases
α-amylases
Hydrolases
Peroxidases
Enzymes enhance the rate of reaction by:
forming a reactant-product complex
changing the equilibrium point of the reaction
combining with the product as soon as it is formed
lowering the activation energy of the reaction
The catalytic efficiency of two different enzymes can be compared by the:
formation of the product
pH optimum value
Km value
molecular size of the enzyme
Which of the following is NOT a part of enzyme but it activates the enzyme?
K
C
N
Si
Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because of all these:
help in regulating metabolism.
are exclusively synthesized in the body of a living organism as at present.
are conjugated proteins.
enhance oxidative metabolism.
Which of the following statements regarding enzyme inhibition is correct?
Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein.
Competitive inhibition is seen when the substrate and the inhibitor competes for the active site on the enzyme.
Non-competitive inhibition of an enzyme can be overcome by adding large amount of substance.
Non-competitive inhibitors often bind to the enzyme irreversibly.
An enzyme brings about:
decrease in reaction time
increase in activation energy
increase in reaction time
reduction in activation energy
What act as cofactors for salivary amylase?
Sodium ion
Potassium ion
Calcium ion
Chloride ions
