Consider the following statements about enzymes:
1. They are biological catalysts.
2. They are consumed in the reaction.
3. They lower the activation energy of reactions.
Which of the above is/are correct?
Explanation:
Enzymes speed up reactions by lowering activation energy and are not consumed; they remain unchanged after the reaction. Thus, statement 2 is false. 1 and 3 are correct.
Explanation:
Certain bacteria, like Bacillus megaterium and Alcaligenes eutrophus, accumulate polyhydroxyalkanoates (PHA) such as PHB as intracellular carbon and energy storage under nutrient stress. These are used to make biodegradable plastics. E. coli is engineered for some bioplastics, but natural producers include Bacillus.
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