Enzymes are the polymers of . . . . . . . .
A. Fatty acids
B. Amino acids
C. Hexose carbon
D. Organic phosphate
Select an option to see the answer and solution.
Which is the enzyme used to remove phosphate group from the 5' end of the DNA
A. Restriction enzymes
B. Alkaline phosphatase
C. Polynucleotide kinase
D. Ribonuclease H
Select an option to see the answer and solution.
If the rate of denaturation of enzyme Y is 1.5*10-4 /min, then the half-life of enzyme Y is . . . . . . . . mins.
A. 0.462*103
B. 4.62*103
C. 46.2*103
D. 0.0462*103
Select an option to see the answer and solution.
The coenzyme is:
A. Often a metal
B. Always a protein
C. Often a vitamin
D. Always an inorganic compound
Select an option to see the answer and solution.
What does the equation, k = A e R T − Δ G represent?
A. Arrhenius equation
B. Miachelis Menton equation
C. Lineweaver Burk equation
D. Half-life
Select an option to see the answer and solution.
Uncompetitive inhibition is most noticeable at low substrate concentration and can be overcome at high substrate concentration.
Select an option to see the answer and solution.
Which of the following rule was not given by the enzyme commission?
A. Assigned each enzyme a name
B. Assigned each enzyme a 4-digit code
C. Divided enzymes into 6 main groups
D. Mention of cofactors
Select an option to see the answer and solution.
Which of the following should be implemented in case of extracting conjugating enzymes?
A. Apt chemical compounds
B. Suitable density gradient
C. Centrifugation technique
D. Proper filtration
Select an option to see the answer and solution.
Diastase takes part in digestion of which one:
A. Protein
B. Starch
C. Amino acids
D. Fat
Select an option to see the answer and solution.
The pH at which half the groups of a compound are ionized is referred to as . . . . . . . .
Select an option to see the answer and solution.
Which of the following is not a reason for selected source to be used readily for the production of enzymes?
A. Socio-economical
B. Political
C. Extraction procedure
D. Geographical
Select an option to see the answer and solution.
Which of the following chemical is not used to isolate enzymes from cell free extract?
A. Polyethyleneimine
B. Polyvinylpyrrolidone
C. EDTA
D. Magnesium chloride
Select an option to see the answer and solution.
. . . . . . . . is a divalent chelator which can be used to extract enzymes from different sources.
A. Sucrose
B. NaOH
C. Lysozyme
D. EDTA
Select an option to see the answer and solution.
Glycosidases, lipases and proteases belong to which class of enzymes?
A. Hydrolases
B. Ligase
C. Isomerases
D. Transferases
Select an option to see the answer and solution.
Which of the following is not a technique for the extraction of enzymes by chemical methods?
A. Alkali treatment
B. Osmotic shock
C. Detergent treatment
D. Homogenization
Select an option to see the answer and solution.
An enzyme that joins the ends of two strands of nucleic acid is:
A. Polymerase
B. Ligase
C. Synthetase
D. Helicase
Select an option to see the answer and solution.
Blocking of enzyme action by blocking its active site is called as:
A. Allosteric inhibition
B. Feedback inhibition
C. Competitive inhibition
D. Non-competitive inhibition
Select an option to see the answer and solution.
The procedure in which cell lysis occur because of shock waves which are formed due to collapses occurring in buffered solution containing cells is referred to as . . . . . . . .
A. Alkali treatment
B. Osmotic shock
C. Ultrasonication
D. Detergent treatment
Select an option to see the answer and solution.
Which one of the following is not an example for ionic-detergent?
A. Sodium dodecyl sulphate (SDS)
B. Tween
C. Sodium lauryl sulphate (SLS)
D. Cetyl trimethyl ammonium bromide
Select an option to see the answer and solution.
The general mechanism is that an enzyme acts by:
A. Reducing the activation energy
B. Increasing activation energy
C. Decreasing pH value
D. Increasing the pH value
Select an option to see the answer and solution.