A catalyst can speed up the rate of a given chemical reaction by
A increasing the equilibrium constant in favor of
products.
B. lowering the activation cnergy required for the
reaction to occur.
C. raising the temperature at which the reaction
occurs.
D. increasing the pressure of reactants, thus
favoring products.

Answer earth,water,fire and air;

Reaction involved in present system is :   c12h22o11 + h2o → 2 c6h12o6the reaction system is obeying following rate law:   rate = k[c12h22o11]thus, it is a first order reaction.now, for 1st order reactionrate constant (k) =  given: initial conc. = 3.0 g, final conc. = 2.7 g, t = 2.5 h∴rate constant (k) =  ∴ k = 0.04215 h-1now, for 1st order reaction, half life = 0.693/k = 0.693/0.04215 = 16.4 hthus correct answer is option b

A-rna has coded instructions for making proteins, and dna translates the code.