Q. In genetic engineering, the antibiotics are used
A) as selectable markers
B) to select healthy vectors
C) as sequences from where replication starts
D) to keep the cultures free of infection
Explanation
[Solution from source] Antibiotic-resistance genes on a vector act as selectable markers: only transformed cells survive on medium containing the antibiotic. The replication start site is the ori, not an antibiotic sequence. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.