A) vitamins
B) hormones
C) enzymes
D) fats
Correct Answer: C
Solution :
Enzymes are biological catalysts which catalyse a vast number of chemical reactions at the temperature suitable for living organisms. Almost all enzymes are basically made up of proteins (except ribozyme). A large number of enzymes require a non-protein component called prosthetic group for their efficient activity. They may be metal activators\[(M{{n}^{+\,+}},{{K}^{+}},M{{g}^{+\,+}}C{{a}^{+\,+}},Z{{n}^{+\,+}},F{{e}^{+\,+}})\] or Co-enzymes (which are often vitamins). Example of Co-enzymes are FMN and FAD (vitamin-\[{{B}_{2}}\]) NAD and NADP (vit.-\[{{B}_{3}}\]). Fats (lipids) are esters of fatty acids and an alcohol. These are water insoluble organic-substances which can be extracted from the cells by organic solvents.
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