In the Hershey and Chase centrifugation, the heavier bacterial cells ended up in the:

1. Centrifuging separates material by density. 2. The heavier bacterial cells settled down and formed a pellet. 3. The lighter phage particles stayed in the supernatant. 4. In the tube containing phage labelled with sulfur-35, the supernatant held the radioactive label and no radioactivity was detected in the pellet. _Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 14 'DNA Structure and Function', sections 14.1-14.6_