In general, an enzyme has one active site at which catalysis can occur. when the substrates are bound to the active site, the enzyme will catalyze the reaction. as the concentration of substrate increases, the reaction rate increases, until the point where the active site is saturated with substrate. when the enzyme is saturated, the rate of the reaction will not increase with the concentration of substrates.

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.

protistas excret ethanol used in the manufacture of vinegar