A plasmid that is attached to the cell membrane or integrated into the bacterial chromosome is called an episome (q.v.). Plasmids are extremely valuable tools in the fields of molecular biology and genetics, specifically in the area of genetic engineering (q.v.).
Gerund and Infinitive: Whatâs the Difference? Knowing the difference between gerund and infinitive can save you from making costly grammar mistakes when writing. In a nutshell, a word formed from a verb acting as a noun and ending in ing is a gerund. Infinitive phrases â normally referred to as infinitives â are formed with the word to in front of a verb.
Don't mistake a present participle phrase for a gerund phrase. Gerund and present participle phrases are easy to confuse because they both begin with an ing word. The difference is the function that they provide in the sentence.A gerund phrase will always behave as a noun while a present participle phrase will act as an adjective. Check out these examples: Walking on the beach, Delores dodged jellyfish that had washed ashore.f the participle is present, it will dependably end in ing. Likewise, a regular past participle will end in a consistent ed. Irregular past participles, unfortunately, conclude in all kinds of ways [although this list will help].