21 explain the conditions needed for the growth of micro-organisms four key factors are needed to make the perfect environment for microorganisms to grow, these include moisture, nutrients, warmth and time moisture – moisture is essential to carry foods in solution into the cell, and carry the waste away from the cell. Microorganisms need time to grow and given the right environmental conditions, they are capable of doubling their numbers in just 20 minutes if you leave food in the danger zone for four hours or more, the levels of microorganisms can be high enough to make someone ill.
The ph of an environment -- a measure of its acidity or alkalinity -- is important for bacterial growth most strains of disease-causing bacteria prefer to grow in conditions with a near neutral ph, similar to the ph of the human body.
The ph conditions may be acidic with ph levels from 6 to 1 alkaline with ph levels from 8 to 14 or somewhat neutral with a ph of around 7 many bacteria grow well at or near a neutral ph of 60 to 80. While some bacteria prefer an alkaline ph (8-9), are called alkalophiles molds and yeasts (fungus) require an optimum ph of about 5 to 6 for growth osmotic pressure: microorganisms require water for growth as they obtain almost all their nutrients in solution from the surrounding water.
What three conditions are ideal for bacteria to grow by stacy taylor updated march 09, 2018 the bare necessities humans need to live are food, water and shelter bacteria have these same needs they need nutrients for energy, water to stay hydrated, and a place to grow that meets their environmental preferences factors that affect the. Conditions required for growth of microorganisms this varies depending on the type of bacteria for example, warmblooded animal pathogenic bacteria require a temperature of around 98 o f, a correct entry site, and for the ho st to be susceptible to that type of bacteria.
3 6 explain the conditions needed for the growth of microorganisms temperature effects on the growth of microorganisms introduction: the purpose of this experiment was to determine the effects that temperature has on three different organisms. The many requirements for successful growth include those both chemical and physical chemical requirements in order to grow successfully, microorganisms must have a supply of water as well as numerous other substances including mineral elements, growth factors, and gas, such as oxygen.
21 explain the conditions needed for the growth of micro-organisms four key factors are needed to make the perfect environment for microorganisms to grow, these include moisture, nutrients, warmth and time. Microorganisms like any other living things needs a favourable conditions for growth, which can be slightly or largely varied with microorganisms some of these conditions generally considered as factors influencing the growth of microorganisms listed below are described in subsequent headlines.