In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[Q]: Calves grow quickly and are weaned from their mothers in only _ to four months.
[A]: three


[Q]: Porcine insulin has _ different amino acid and bovine insulin has three different amino acids.
[A]: one


[Q]: Succinylcholine is composed of _ molecules of acetylcholine.
[A]:
two