A series of enzymes catalyze the reaction X Y Z A. Product A binds to the enzyme that converts X to Y at a position remote from
its active site. This binding decreases the activity of the enzyme.With respect to the enzyme that converts X to Y, substance A functions asa. a coenzyme.b. an allosteric inhibitor.c. the substrate.d. an intermediate.e. a competitive inhibitor.
As the enzyme activity decreases, it is not possible for A to be a coenzyme (most likely would increase the enzyme activity), a substrate (increases activity of enzyme by Le Chatler's principle) or an intermediate (no effect). A is unlikely to be a competitive inhibitor as this would not decrease the activity of the enzyme, only reduce the rate of conversion of substrate to product. A is most likely an allosteric inhibitor which binds to another site on the enzyme (other than the active site), resulting in a change in conformation of the enzyme which reduces the enzymatic activity.
Assuming that all of them was made without sugar, Butter beans has the most amount of carbohydrates the options above 100 gram of butter beans contains about 21 gram of carbohydrates. This is way more than tuna and fruits who contains 0 carbs and protein that only contains 1.1 gram.