Biology Report Of Fungus: Baker's Yeast

752 words - 3 pages

Biology Report: Plants:Baker's YeastBy Sterling Haws1. What Is Yeast?Yeast is simple fungus. The term "yeast" refers more to a life-style than to a phylogenetic classification. Yeast refers to the unicellular phase of the life cycles of many different fungi, but it is used more commonly as a generic term for fungi that have only a unicellular phase. The organisms most often called "yeast" such as common baking or brewing yeast are strains of the species Saccharomyces cerevisiae. As fungi, they are classified as ascomycetes, a group which also includes a number of other popular genetic organisms, such as Neurospora and Sordaria. Except when we refer to other species of yeast by name, we will use the term "yeast" to refer to Saccharomyces cerevisiae.Yeast has simple nutritional needs. Unable to carry out photosynthesis, they require a reduced carbon source, which can be as simple a compound as acetate. In addition, they also require a nitrogen source such as ammonium sulfate. Yeasts can use a variety of organic nitrogen compounds, including urea and various amino acids. The only other complex compound that they require is the vitamin, biotin. Of course, they also require a variety of salts and trace elements.Ascomycetes, such as baker's yeast, are popular for genetics research because the ascospores they produce in each ascus are the products of meiosis. When yeast is nutritionally stressed, for example by deprivation of either a carbon source or a nitrogen source, diploid yeast will sporulate. The diploid nucleus goes through meiosis, producing four haploid nuclei, which are then incorporated into four stress-resistant ascospores, encapsulated in the ascus. This packaging of the four meiotic products makes genetic analysis particularly simple.2. What Are Yeast Good For?People have used yeast, undoubtedly one of the earliest domesticated organisms, for controlled fermentation of food and drink and for leavening in baking throughout recorded history. Today, they are also used in a variety of commercial fermentation and biomass conversion processes. Their usefulness is based on their ability to convert sugars and other carbon sources into ethanol in the absence of air, and into carbon dioxide and water in the presence of air. Ethanol is a valuable alternative to petroleum as a...

Find Another Essay On Biology Report of Fungus: Baker's Yeast

Biology Lab Report on the extraction of Chlorophyl from Plant Leaves

869 words - 3 pages AbstractThis experiment focused on extracting and separating pigments of Chloroplast. For the procedure green leaves were grinded in a mortar with some chemicals and the fluid was filtrated to use for further analysis. Stripes of this solution were put on a filter paper and later, after dried placed into a beacon of solvent. After this the chloroplast pigments were separated by the solvent into groups of more or less soluble pigments.AimHow many

The Process of Osmosis and Diffusion in Dialysis Tubing - Biology - Scientific Report

1925 words - 8 pages source can smell the perfume. Osmosis- Osmosis is a specialized case of diffusion that involves the passive transport of water. In osmosis water moves through a selectively permeable membrane from a region of its higher concentration to a region of its lower concentration. The membrane selectively allows passage of certain types of molecules while restricting the movement of others.” ("Pearson - The Biology Place") 1.4 Identify a structure

Bird Mimicry Study-The eating habits of birds with different types of food - Colgate, Biology - Lab Report

2917 words - 12 pages Dante Brittis 2/9/15 Mimicry Lab The effect of using different colored dough worms of varying palatability to test mimicry and feeding bias in birds. Abstract Animals have developed adaptions to warn predators with bright colors denoting toxic chemicals that they contain, and others have learned to mimic these colors in order to avoid attack. The ratio of model animals with toxic chemicals to the mimics can affect how well these defense

TO TEST THE EFFECTS OF ANTACIDS ON PEPSIN'S ABILITY TO DIGEST PROTEIN. Biology report - minus introduction, discussion & conclusion

1808 words - 7 pages . Sutliffe, Jimmy. "Antacids." Xnet. 31 Feb. 2006. 25 Feb. 2008 <www.xnet.com/sciencefairexperiements/biology/72_#77/sutliffe.htm>.6. Whitman, Cory. "Pepsin and Protein Digestion." July 2002. Australian Academy of Science. 6 Feb. 2008 <www.science.org.au/archives/55FTL/17.htm>.

Bio fuels of Yeast fermentation

1183 words - 5 pages brewing yeast, bread or regular yeast, and ale yeast. Brewing yeast is from a single-celled fungus named Saccharomyces cerevisiae. This type of yeast is used for baking, brewing and winemaking. S. cerevisiae is diploid with high rate of reproduction (Legras et al, 2007). Which means that the carbon dioxide levels should be relatively high when fermentation occurs and would serve as good biofuel. The age of the yeast cells will depend if the

Yeast Most Effectively Ferments Glucose in comparison to Fructose and Sucrose - Azusa Pacific University/Biology - Lab write up

1258 words - 6 pages Yeast Most Effectively Ferments Glucose in comparison to Fructose and Sucrose Introduction: The scientific name for yeast is Saccharomyces cerevisiae which translates to “sugar-eating fungus”. Yeast is capable of fermentation which occurs naturally in nature. Ethanol fermentation takes place in the cytoplasm of plant cells and does not involve the mitochondria. Ethanol fermentation is an anaerobic process that does not require oxygen, unlike

A comparison of the respiration of yeast in different sugar substrates

6583 words - 26 pages Biology Fermentation Practical"A comparison of the respiration of yeast in different sugar substrates"Aim: The aim was to compare the respiration of yeast in different substrates of sugars, i.e. between a monosaccharide (glucose) and a disaccharide (maltose)Theory: There are three types of Carbohydrates, monosaccharides, disaccharides, and polysaccharides. The two, which I will be looking at, are, monosaccharide (glucose) and the disaccharide

Rate of change of fermentation - Essay

429 words - 2 pages The rates of chemical reactions are affected by temperature. The purpose of this experiment was to test the effect of five different temperatures on the rate of carbon dioxide production in yeast by measuring the fermentation rate. Saccharomyces, also known as yeast, is a unicellular, eukaryotic sac fungus and is good for this experiment because of it's characteristic of alcohol fermentation. The group was able to document the carbon dioxide

Ingredients

841 words - 4 pages thicken fruit preserves, jams and jellies. Leavening agents Leavening is production or incorporation of gasses in a dough or batter because gasses expand greatly when heated. Baked products increase in volume, get shape and texture. There are three main gasses that we use in baking: carbon dioxide, steam and air. Yeast is a living organism, single-celled fungus. Yeast feeds on carbohydrates in the dough (starches and sucrose) converting them

Opportunistic Fungal Infections

1133 words - 5 pages - monthECMMsurveyofcryptococcosisinEurope,”FEMSYeast Research, vol. 6, no. 4, pp. 614–619, 2006. [62] S. H. M. Chen, M. F. Stins, S. H. Huang et al., “Cryptococcus neoformans induces alterations in the cytoskeleton of human brainmicrovascularendothelialcells,”JournalofMedicalMicro- biology, vol. 52, no. 11, pp. 961–970, 2003. [63] Y. C. Chang, M. F. Stins, M. J. McCaffery et al., “Cryptococcal yeast cells invade the central nervous system via

Rate of Respiration in Yeast

2513 words - 10 pages efficient as the glucose at providing the yeast with a better medium by which it will produce a faster rate of respiration. Theory: Yeast is a single celled fungus. It feeds saprophytically (secreting enzymes from cells) the enzymes digest the food on which the yeast is living. The enzymes digest the food the yeast is living on (normally sugars such as Glucose and Sucrose) breaking down the large molecules into smaller

Similar Essays

Affect Of Enzymes On Yeast Lab Hl Biology Assignment

2006 words - 9 pages Yeast Enzyme Lab Research Question What effect does differing levels of percent concentration of a five millileter hydrogen peroxide solution, the substrate, from one percent to five percent have on average rate of respiration of catalase, the enzyme in a 5 milliliter or centimeters cubed, 100 percent solution of yeast, with temperature staging constant? Hypothesis If the substrate, hydrogen peroxide, concentration increases from 1

Biology Lab Report On The Effects Of Photosynthesis

1275 words - 5 pages AbstractFor this lab the rate of photosynthesis was analyzed upon plant leaves. A sample of a light exposed and a not-light exposed leave were used to clearly identify the role of sunlight in the process of producing and storing energy.AimWe are trying to find proof, to demonstrate the necessity of light and chlorophyll in the process of photosynthesis.BackgroundPhotosynthesis occurs in organisms which contain chlorophyll. It's a process that

This Is A Short Report About The Dissufion Of Carbon Dioxide On The P H Of Water. Bghs Biology Report

423 words - 2 pages Perform an experiment to demonstrate the effect of dissolved carbon dioxide on the PH of water. AIM: To demonstrate the effect of dissolved carbon dioxide on the PH of water HYPOTHESIS: Dissolved carbon dioxide in water affects the PH level. Therefore dissolved (co2) decreases the PH of water EQUIPMENT NEEDED: · PH probe · Data logger · 250ML beaker · Distilled water · Universal indicator · Limewater · Straw HYPOTHESIS: When carbon dioxide is

Biology Lab Report On The Effects Of Adrenalin On A Daphnia

1450 words - 6 pages AbstractFor this experiment we tested the effects of different adrenalin concentrations (0.001%; 0.01%; 0.1%) on the daphnia flea. The daphnia was placed on a slide with cover slip in order to examine its heartbeat by using the microscope.AimIn this Lab we will study the effect of different concentrations of adrenalin on the heart rate daphnia, the water flea.It is expected to recognize a threshold of the daphnia in its reaction the three