6. A table comparing the characteristics of four samples is shown.
Sample Nucleus Chloroplast Ribosome
Sample 1 Present Present
Present
Sample 2 Absent
Absent
Present
Sample 3 Absent Absent
Absent
Sample 4 Present Absent
Present
Which sample most likely contains viruses?
Size of Genome
150 billion base pairs
4.6 million base pairs
170,000 base pairs
3.2 billion base pairs