TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Some viruses carry a few viral enzyme molecules within their capsids.

SOLUTION: Some viruses carry a few viral enzyme molecules within their what?

PROBLEM: Digestion begins in the gastrovascular cavity.

SOLUTION: Where does digestion begin?

PROBLEM: Biomass can also be processed to make biofuel.

SOLUTION:
Biomass can also be processed to make what kind of fuel?