Water-soluble vitamins: a. often result in toxicities b. are easily excreted in the urine c. are stored in body tissues to a large extent d. are soluble in body fluids but insoluble in cooking water e. are not damaged by heat or oxygen exposure

Option (b) is the correct answer.

Explanation:

Vitamins which are soluble in water are known as water-soluble vitamins. And, vitamins which remain insoluble in water are known as water-insoluble vitamins.

Water-soluble vitamins are able to be easily excreted by the human body through urine. For example, vitamin C and vitamin B-complex are water soluble vitamins.

Thus, we can conclude that water-soluble vitamins are easily excreted in the urine.

0.75

Explanation:

Mathematically, the equilibrium constant Keq is the concentration of product divided by the concentration of the reactant.

And since the product is fructose 6-phosphate (F6P) while the reactant is glucose 6-phosphate (G6P):

Keq = [F6P] / [G6P]

Keq = 0.6 / 0.8

Keq = 0.75 (since Keq is almost equal to 1, it means the amount of F6P and G6P in the reaction is almost the same)

Thus, the equilibrium constant Keq for this reaction is 0.75