Phenylalanine, tyrosine, tryptophan. Aliphatic amino acids: These are ones which have aliphatic groups like -CH2- in between carboxylic and amine moiety. They are the ones excluding aromatic amino acids from the above list of both essential and non-essential ones.
What is a paragraph? A paragraph is a collection of related sentences dealing with a single topic. Learning to write good paragraphs will help you as a writer stay on track during your drafting and revision stages. Good paragraphing also greatly assists your readers in following a piece of writing.
Report Abuse. You should start your first paragraph (or sentence) by introducing yourself. For example: My name is ______, and. . . . (and go one with what ever you want to write about.) Keep in mind that you want to catch your reader's attention by keeping it straight forward and positive.