BIOLOGY 1A03 Study Guide - Final Guide: Petri Dish, Microbiological Culture, Gene Expression

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Alastair Tracey Rosa Da Silva

Document Summary

Under favourable conditions and available nutrients all cells have the essential machinery that favours growth and division. In this movie, we can see how bacterial cells are rapidly dividing in a petri dish. Within hours, millions of cells will take up the space that was originally occupied by the early colonizers of this dish. All prokaryotes require the essential nutrients that are important for growth and cell division. Some of these aerobic environments can be recreated in the laboratory using culture media that is stock-filled with these nutrients which can include amino acids, vitamins, nucleotides and carbohydrates. Most prokaryotes grow best at certain favourable temperatures. However, environments can undergo variable changes where a prokaryote may need to adapt to what is available. This is where gene regulation becomes important to help prokaryotes respond to their environments. The dna of the bacterial nucleoid contains the information that is required to orchestrate a response to any change in the environment.