1. Which enzyme is typically isolated from pig heart tissues on Days 1 to 3 of the isolation process? A) Catalase B) Trypsin C) Lactate dehydrogenase D) Cytochrome C Correct answer: C) Lactate dehydrogenase Rationale: Lactate dehydrogenase is a commonly isolated enzyme from pig heart tissues due to its abundance and importance in cellular respiration. 2. True or False: The isolation of an enzyme from pig heart involves both physical and chemical methods. Correct answer: True Rationale: Isolation of enzymes typically involves a combination of physical methods such as tissue homogenization and centrifugation, as well as chemical methods such as extraction and purification techniques. 3. What is the purpose of homogenizing pig heart tissues in the isolation of an enzyme? A) To break down cell membranes and release cellular components B) To remove impurities from the tissue sample C) To isolate the enzyme through selective precipitation D) To facilitate the binding of the enzyme to a chromatography column Correct answer: A) To break down cell membranes and release cellular components