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

Type of membrane is the cell membrane, Q. Concerning permeability what type...

Q. Concerning permeability what type of membrane is the cell membrane? The cell membrane is a selectively permeable membrane that is it allows the passage of water and some sel

What is pre-requisites of counselling, Q. What is Pre-requisites of counsel...

Q. What is Pre-requisites of counselling? Pre-requisites of counselling are: 1. Facilities for counselling to be available for the patient near home or working place. 2.

Tropical seasonal forests - ecosystem, Tropical seasonal forests - Ecosyste...

Tropical seasonal forests - Ecosystem Tropical seasonal forests occur in regions where total annual rainfall is very high but segregated into pronounced wet and dry periods. T

Categorisation of neuropsychological assessment, Categorisation of Neuropsy...

Categorisation of Neuropsychological Assessment One can divide neuropsychological assessment into two areas: i) Comprehensive and ii) Specialised assessment. Comprehen

Explain oxygen therapyin respiratory support, Explain Oxygen Therapyin resp...

Explain Oxygen Therapyin respiratory support? Oxygen is given to correct hypoxemia. An initial high concentration of oxygen (FiO2) is given while the underlying cause is identi

Homework, The Waldorf family was caught in a fire but escaped. Unfortunatel...

The Waldorf family was caught in a fire but escaped. Unfortunately, the father and daughter suffered burns. The father had second-degree burns on his entire chest, abdomen, and bot

Implant system, In the early 1970's, Schroeder and his group designed a sin...

In the early 1970's, Schroeder and his group designed a single stage implant system known by the name of ITI Implant System. They demonstrated that one-stage implant can also resul

What do you understand by global warming, Q. What do you understand by glob...

Q. What do you understand by global warming? The Global warming is the increase in the temperature of the planet due to accumulation of some gases in the atmosphere, especially

How are human voices created, How are human voices created? Human voice...

How are human voices created? Human voice is formed with the help of muscles in the neck and the vocal cords. The tighter the vocal cords the higher the pitch of voice. This is

Trisaccharides, TRISACCHARIDES The oligosaccharides are made of three m...

TRISACCHARIDES The oligosaccharides are made of three monosaccharide residues. A common trisaccharides is Raffinose which is formed by condensation of galactose-glucose-fr

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