instruction:
In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
question:
Question: Catecholamines are a class of amine hormones synthesised form which amino acid? Answer: tyrosine
answer:
Catecholamines are a class of amine hormones that when synthesised form the amino acid tyrosine.

question:
Question: What holds ionic and covalent compounds together? Answer: electrostatic attractions
answer:
Electrostatic attractions holds ionic and covalent compounds together.

question:
Question: The difference in electric potential energy which allows for an electric charge to move from one position to another is measured by what si unit? Answer: volt
answer:
The difference in electric potential energy which allows for an electric charge to move from one position to another is measured by the volt si unit.