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.
Definition. An introductory paragraph is the opening paragraph in a conventional essay, composition, or report. The primary purpose of an introductory paragraph is to attract the reader's attention and identify the topic and purpose of the essay. A thesis statement often appears at the end of an introductory paragraph. See Examples and Observations below. Also see: 1  How to Begin an Essay: 13 Engaging Strategies With Examples. 2  Five-Paragraph Essay. 3  Hookers vs. Chasers: How Not to Begin an Essay. 4  Imperative Sentence. 5  Introduction. 6  Journalists' Questions.