TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Carried through body happens if cancer cells enter the blood stream.

SOLUTION: What happens if cancer cells enter the blood stream?

PROBLEM: Phospholipids are vesicles made of.

SOLUTION: What are vesicles made of?

PROBLEM: Nucleic acids are found in all living cells and  viruses.

SOLUTION:
Nucleic acids are found in all living cells and also what?