instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
The nuclear envelope is a double-layered plasma membrane like the cell membrane, although without membrane proteins.
answer:
The nuclear envelope is a double-layered plasma membrane like the cell membrane, although without what?


question:
Gardasil is the vaccine to prevent infection of hpv.
answer:
What is the vaccine to prevent infection of hpv?


question:
You call the carbohydrate formed when two monosaccharides bond together disaccharide.
answer:
What do you call the carbohydrate formed when two monosaccharides bond together?