Question

help lower the activation energy needed for a chemical reaction and also regulate the speed of reactions within a cell. Two primary contributors to the amount of their activity are and Select one: a. Enzymes, pH, temperature b. Substrates, temperature, pH c. Organelles, pH, mitochondria 10 d. Mitochondria, temperature, substrates

Answer 1

(a)Enzyme; pH and temperature

Ezymes enhance the rate of reaction by lowering the activation energy of a reaction.

The activity of enzymes is influences by a variety of factors including - pH, temperature, presence of organic and inorganic co-factors, presence of enzyme inhibitors, etc. Among these, pH and temperature are relevant to the question.

Some enzymes work in acidic or alkaline pH while others might function at neutral pH.

Temperature - Most enzymes in the human body work best at 37 C. Higher temperatures tend to cause denaturation.