Answer:
B: Enzymes
Explanation:
Enzymes are basically proteinaceous chemicals found in higher living organisms like humans, that have ability to catalyze a chemical reaction without being used in a chemical reaction.
In actual, all chemical reactions that take place in plants, animals and microorganisms are controlled by the action of enzymes. For example: There is an enzyme pepsin present in stomach of humans that helps in breaking down the food in to smaller particles and speeds up the digestion process and at the end of process remains as it is in own place. So if a cell loses its ability to carry on the catalyzing function in chemical reaction, it may indicate that the responsible enzyme has lost its function due to disruption of change in its amino acid sequence or any underlying genetic mutation in genetic sequence responsible for the production of that enzyme.
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