Define about the yeast - saccharomyces, Biology

Assignment Help:

Define about the Yeast - Saccharomyces?

Classification

Kingdom - Mycetae

Division - Amastigomycota

Class - Ascomycetes

Order - Endomycetales

Family - Saccharomycetaceae

Genus - Saccharomyces

Yeasts are unicellular organisms, which are usually spherical or oval in shape as can be seen in Figure above. Some yeasts may be cylindrical. Few common examples of yeast are Torula, Saccharomyces etc. It is present on cheese and other foods. Colonies are white, pink, moist with unbroken even edges. Cells are oval, colourless. Yeasts are facultative anaerobes and can survive well in various environments. Yeasts reproduce asexually by budding (budding yeast, e.g. Saccharomyces) or by binary fission (fission yeasts - Schizosaccharomyces).

In budding, a small outgrowth called a bud arises. Parent nucleus divides and one nucleus migrates into a bud. Cell wall material is then laid down and the bud breaks away and grows to form a daughter cell. Fission yeast divides into two new cells by elongations followed by division into two. Sexual reproduction is also observed in some yeasts. Ascospores are produced within the ascus through sexual reproduction, which are released and begin the cycle again. As discussed earlier yeasts are both beneficial and harmful. Some yeasts causes disease in human e.g. Candida albican causes urinary and vaginal infections (moniliasis) and mouth infection (thrush).


Related Discussions:- Define about the yeast - saccharomyces

Explain the role of lipoprotein, Explain the Role of Lipoprotein ? As d...

Explain the Role of Lipoprotein ? As discussed in the previous section, serum concentrations of Lp(a) are elevated in South Asians irrespective of their migrant status. Several

Evaluating the wound assessment , I will send any further instructions to y...

I will send any further instructions to you. The ist part of the assessment (1-7) that evaluates the chart i have done but it needs to be looked at to see if content okay & gram

Inverse pcr, Inverse PCR is the variation of PCR which makes the amplifica...

Inverse PCR is the variation of PCR which makes the amplification of DNA segments of unknown sequence that flank DNA segments of the known sequence possible; in short, total DNA i

Define vitamins required for underweight - nutritional care, Define Vitamin...

Define Vitamins required for underweight - nutritional care? If the diet provides good amounts of fresh fruits and vegetables, vitamin or mineral supplements are usually not re

Checker board (punnet''s square) method, CHECKER BOARD (PUNNET'S SQUARE) ME...

CHECKER BOARD (PUNNET'S SQUARE) METHOD 1.         If the genotypes of the parents are known, the genotypes of their offspring can be easily predicted with the help of a chart c

Features of gateway vector, Could any of the following features be useful i...

Could any of the following features be useful in a gateway vector; (i) Origin of replication (ii) multiple cloning site (iii) blue/white selection (iv) M13 forward and rev

How were the classification systems of aristotle, How were the classificati...

How were the classification systems of Aristotle and Linnaeus similar?  Both systems divided all living things into two major groups, animals and plants, but Aristotle's system

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd