801. Rate of enzymatic reaction is directly proportional to the concentration of___________________?
A. Enzyme
B. Substrate
C. Enzyme and substrate
D. Enzyme and product

802. Purines and pyrimidines are__________________?
A. Enzymes
B. Nitrogenous bases
C. Carbohydrates
D. Lipids

803. Nucleic acids direct the synthesis of__________________?
A. Glucose
B. Triglycerides
C. Proteins
D. All

804. The fertility of the soil is improved by________________?
A. Rotation of the crops
B. Adding lime to the acid salts
C. Adding manure and growing legumes
D. All

805. The fertilizers which provide single nutrient from NPK are called ___________ fertilizer?
A. straight
B. compound
C. both a and b
D. none of the above

806. Addition of urea to the soil is ____________ reaction?
A. endothermic
B. exothermic
C. both a and b
D. no heat energy is involved

807. The cooling of molten urea by air in the tower is called______________________?
A. prilling
B. evaporation
C. condensation
D. crystallization

808. DAP (Diammonium hydrogen phosphate) contains ______________ plant nutrients?
A. 60%
B. 65%
C. 70%
D. 75%

809. Calcarious material includes_________________?
A. lime stone
B. marble
C. chalk
D. all of the above

810. Which of the following processes is used for the synthesis of cement ?
A. dry process
B. wet process
C. both
D. none