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What conditions are the most favourable for microbial food production? -…
What conditions are the most favourable for microbial food production?
What Conditions
Temperature
To hot- Above 35 C
May kill off microbials
To Cold - Below 32 C
May prevent them from producing
Place yeast in different temperatures to record how often respiration takes place, determine whether hotter or colder temperature are more favorable.
Light
To
Dark:
Yeast is a fungus, therefore it grows well in darker areas. A study was done in which more yeast cells were observed after a week in dark conditions compared to light ones.
To much sunlight
: Because Yeast is a fungus, to much light will break down the cell membrane. However, a moderate intensity will help growth, respiration and protein synthesis.
Less production
Test how varying amounts of light affect the number of CO2 produced, will determine how often respiration is taking place and therefore number of yeast
Nutrients
Water
: Works as a solvent and dispersing agent for the yeast. Water is necessary for the process of fermentation.
Adjusting water amount affecting the rate of production
Test microbial count with yeast to water ratio, will more yeast less water cause more production, or will more water less yeast
Oxygen
Carbon dioxide
Glucose
Humidity
Amount of water in the air may affect the rate of yeast production, as water plays a role in the activation of yeast and the beginning of respiration.
The more humid, the higher the moisture in the air. Therefore the increase of yeast production
PH Levels
What affects to varying PH levels have on the yeast fermentation process
Most Favourable
Best at increasing production rate
Results in a higher microbial count
Optimal
Homeostasis
: A self-regulated process in which biological systems maintain a stable level of of internal conditions, by adapting to the environment around them.
Temperature:
Yeast has multiple optimal temperatures depending on what is required, however 32 - 35 Celsius is best for yeast fermentation.
Test the effect different temperatures have on yeast production and count
PH:
optimal PH for yeast growth is between levels 4.5 - 6.5.
Microbial Food
Yeast
: Yeast is a single-celled organism that requires warmth, food and moisture to thrive. It converts its food of glucose and starch into carbon dioxide and alchohol.
Bread
: Through the process of fermentation, creates carbon dioxide that helps make bread rise. Yeast does this by feeding on the sugars found within the flour.
Fermentation:
The process in which
anaerobic
respiration takes place. Converts sugars and oxygen into carbon dioxide and ethanol.
Production
Rate at which microbial food is reproduced
Aerobic:
. If oxygen is presence of oxygen, yeast will undergo aerobic respiration. This will cause it to convert sugars into carbon dioxide and water.
Anaerobic:
. If there is no oxygen available, yeast will go through anaerobic respiration, in which it will create carbon dioxide and alcohol. This is called fermentation.
Depends ON
WHAT CONDITIONS
Yeast Reproduction
: Yeast undergo asexual reproduction in which small buds split to form new daughter cells. The process is called "budding".