Related Questions

Enzymes (a protein) are catalysts found in organisms. Its efficiency of catalysing a reaction is due to its capacity to lower the activation energy of the reaction. The enzyme ptyalin used for food digestion is present in
A Blood
B Saliva
C Intestine
D Gland
Organic catalysts differ from the inorganic catalyst in the sense that the former is
A Active at cryogenic temperatures only
B Prohibitively costly
C Proteinous in nature
D Active at very high temperature only
Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C.
A 400-500
B 900-1000
C 1400-1500
D 1700-1800
Vitamins acting as co-enzymes in different biochemical reactions
A Vitamin C
B Riboflavin
C Cyanocobalamin
D Vitamin D
E Vitamin A
Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C.
A -5 to 0
B 5 to 10
C 30 to 50
D 75 to 80
The catalytic activity of enzymes is due to their capacity to lower the __________ energy.
A Activation
B Potential
C Kinetic
D None of these
At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.
A Independent of
B Directly proportional to
C Inversely proportional to
D Proportional to the square of
Study of chemical kinetics is the easiest in the case of __________ reactions.
A Irreversible
B Reversible
C Surface
D Side
In nuclear reactions, __________ number is conserved.
A Mass
B Atomic
C Both A & B
D Neither A nor B
Energy of the sun arises mainly from __________ reactions.
A Fusion
B Fission
C Combustion
D None of these

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