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Why is optimum temperature followed in restriction digestion?

Answer and explanation

Correct answer: To keep enzyme activity best

The direct answer is option A: the optimum temperature is followed to keep restriction-enzyme activity at its best. Every enzyme has conditions in which its reaction rate is high while its structure remains stable. At the recommended temperature, the restriction enzyme can recognize its target sequence and cut DNA efficiently. If the temperature is too low, the reaction may become slow. If it is too high, the protein may lose its shape and activity. Option A is correct. Option B is wrong because temperature does not make DNA invisible; DNA visibility depends on staining and detection. Option C is wrong because ordinary reaction-temperature control does not aim to solidify water. Option D is wrong because proteins do not become starch simply by changing temperature. The correct temperature alone is not enough: suitable buffer, magnesium ions when required, clean DNA, proper enzyme amount, and sufficient time are also important. Memory cue: optimum temperature means maximum useful enzyme work, not maximum possible heat.

Related tags

Optimum TemperatureEnzyme ActivityDigestion

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