TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: The double helix dna shape forms when the two nucleotide chains wrap around the same axis.

SOLUTION: What distinctive dna shape forms when the two nucleotide chains wrap around the same axis?

PROBLEM: Sucrose is formed when a monomer of glucose and a monomer of fructose are joined in a dehydration reaction to form a glycosidic bond.

SOLUTION: What is formed when a monomer of glucose and a monomer of fructose are joined in a dehydration reaction to form a glycosidic bond?

PROBLEM: Terrestrial biomes are classified by climatic factors and types of primary producers.

SOLUTION:
What are classified by climatic factors and types of primary producers?