During the attachment phase of a T4 bacteriophage to an E. coli cell, which specific structure facilitates the initial recognition of the receptor sites?
Q1. During the attachment phase of a T4 bacteriophage to an E. coli cell, which specific structure facilitates the initial recognition of the receptor sites?
Answer: Tail fibers
Explanation: Tail fibers are responsible for attachment to receptor sites. The tail sheath contracts to inject DNA, but it does not perform recognition.