Final answer:
Apo B-48 is smaller than apo B-100 due to differences in triglyceride and protein content.
Step-by-step explanation:
apo B-48 and apo B-100 are different forms of apolipoprotein B, which are proteins found in lipoproteins. Apo B-48 is smaller in size compared to apo B-100. The size difference between the two is due to the amount of triglyceride and protein they contain. Apo B-100 is larger because it contains a higher percentage of triglyceride and a lower percentage of protein, while apo B-48 has a lower percentage of triglyceride and a higher percentage of protein.