BIOD 171 Module 4 Exam 100% SUCCESS

BIOD 171 Module 4 Exam 100% SUCCESS What is another name for a liquid growth media, and what are the basic components? - ANSWERS-Growth media in a liquid form is often referred to as nutrient broth. As the name implies its composition consists primarily of essential 'ingredients' such as a rich source of sugars, amino acids, and vitamins. Together, a nutrient broth provides the microbe with a source of carbon/energy, which, in turn, encourages its expansion. What is selective media? - ANSWERS-Selective media allows for only the growth of certain microbes while restricting the growth of all others. What is differential media? - ANSWERS-Differential media is used to distinguish between two (or more) related microbes. What are the requirements of a fastidious microbe? - ANSWERS-A fastidious microbe is an organism with complex growth requirements such that if absent it will not grow. Enriched medias thus contain these specific and essential nutrients required for the growth of a particular subset of microorganisms. What is agar? - ANSWERS-In its simplest form agar is liquid growth media that has had a hardening agent added to it. Agar is created when a polysaccharide derived from seaweed (algae) extract is added to growth media. Agar is used to create a solid, smooth surface on which microbes can grow. LB agar is classified as a non-selective, differential media True False - ANSWERS-Fals