Which of the Following Is True About Taq Polymerase

Multiple Choice

Which of the following is true about Taq polymerase?
1) It does not contain a built-in 3¢ ® 5¢ proofreading activity
2) It produces a higher than normal frequency of replication errors
3) It is derived from a bacteria known as Thermus aquaticus

A) 1
B) 2
C) 3
D) 1 and 3
E) All of these