Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Input: Passage: When milk is pasteurized, it is heated to high temperatures. These high temperatures denature the proteins in bacteria, so they cannot carry out needed functions to grow and multiply. Answer: pasteurization
Output:
Milk is usually subjected to what process, where high temperatures denature the proteins in bacteria so they cannot carry out functions needed to grow and multiply?