You didn't provide the reaction, but enzymes usually just help the reaction take place, often faster then it would in regular conditions. They are completely used up during the reaction and don't affect it in any other way, meaning they don't change the properties of the compounds.
Answer:
Option (D)
Explanation:
In terms of chemistry, a catalyst is usually defined as the substance that is commonly used in a reaction in order to increase the rate of reaction, without getting consumed. It helps in the reduction of activation energy.
In the given case, the lever or a person can be considered as a catalyst because both of these will increase the efficiency (or rate) in removing the rock from the top of the perch. Thus, the lever or the human will remain the same after the removal of rock as a catalyst can be recovered after the reaction.
Therefore, the correct answer is option (D).
In the emotional, facial, memory, motor, social, spatial,
and verbal domains cerebral cortex abstracting thinking and decision making part
of the brain we can see frontal lobes of the cortex - higher order thinking and
good judgment impairment here; get them drunk and observe their social
judgment.
There isnt any choices but i know that the answer is Uracil (it's found in RNA)
