Among the following options, choose the term that describes enzymes with minor variations in molecular structure but carry out the same function:
Holoenzymes
Isoenzymes
Apoenzymes
Coenzymes
Isoenzymes, also known as isozymes, refer to enzymes that have similar catalytic functions but differ slightly in their molecular structure. These variations can arise due to genetic differences or tissue-specific expression of different enzyme forms. Despite their slight structural differences, isoenzymes perform the same biochemical activity or catalyze the same reaction. Hence, option 2, Isoenzymes, accurately represents the concept of enzymes with minor molecular structure variations but identical functional activity.
Hence, the correct answer is option 2.