Which of the following statements is true

An enzyme lowers the energy of activation. what does that mean?

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen