This is a correct answer to the following question about List of The Big Bang Theory characters. Yes or no?
Answer: The show centers on five characters: roommates Sheldon Cooper and Leonard Hofstadter , two Caltech physicists; Penny, a waitress and aspiring actress who lives across the hall; and Leonard and Sheldon's friends and co-workers aerospace engineer Howard Wolowitz , and astrophysicist Rajesh Koothrappali .
Question: who voices wolowitz mother?
