I believe it would be a verb phrase because it is stating the action
I'm not sure what's the question
Enzymes are made from amino acids and they are proteins. When an enzyme is formed it is made by stringing together between 100 to 1000 amino acids in a very specific unique order.
Answer:
Let us walk to the school.
He is taking tea.
It has been done.
They have not finished it yet.
He ran two km yesterday.
An appositive phrase is a grouping of words that gives another name or renames the object or noun right next to it.
Ex: The insect, a cockroach, is moving along in the shadows, avoiding the light. <span />