Question

Metabolism is _____.

1. a measure of the hydrogen ion concentration in a solution
2. the energy required to start a chemical reaction
3. all of the chemical reactions in an organism required to sustain life
4. a chemical reaction in which the substrates trade constituent parts

Answer 1

The answer would be all of the chemical reactions in an organism required to sustain life

Answer 2

Answer: 3 : All of the chemical reactions in an organism required to sustain life.

Explanation: Metabolism is the process of converting food into energy form ( ATP). Metabolism is set of biochemical reactions which is completed in presence of necessary enzymes and is essential to sustain life.