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

Antibiotic resistance, Antibiotic resistance is the resistance conferred t...

Antibiotic resistance is the resistance conferred to the host the ability to survive a given antibiotic by the plasmids containing resistance genes. If such kind of plasmid is pre

Matter - living and non-living, Matter - Living and Non-Living Our uni...

Matter - Living and Non-Living Our universe is made up of two basic components:, matter and. energy. Matter, as you know, has mass; it occupies space. You can touch matter. It

Adrenal gland, ADRENAL OR SUPRARENAL GLANDS (GLANDS OF EMERGENCY) - ...

ADRENAL OR SUPRARENAL GLANDS (GLANDS OF EMERGENCY) - These are paired structures located on the top of the kidneys. Each adrenal gland has two parts external adrenal cort

Describe infection control sterilization protocol, Q. Describe Infection co...

Q. Describe Infection control sterilization protocol? Today is the age of modern technology coupled with medical challenges. Pervasive increase in serious transmissible disease

Why does dna twist, Why does DNA twist? If it did not twist, would you...

Why does DNA twist? If it did not twist, would you expect it to fit into the miniscule cell? As we all know, if we join all of the DNA molecules from a person's body end to en

Production of substances - responses to infection, Production of substances...

Production of substances interfering with virus proliferation In some cases plants are known to synthesise chemicals that inhibit crucial functions of pathogens. This makes pl

Defects of nervous system, DEFECT S OF NERVOUS SYSTEM - 1.      Ataxi...

DEFECT S OF NERVOUS SYSTEM - 1.      Ataxia - Lack of muscle-cordination due to damage of cerebellum. 2.      Dyslexia - In ability of a person to comprehense written l

How are membranes classified, Concerning their permeability how are membran...

Concerning their permeability how are membranes classified? Membranes can be divided as impermeable, permeable, semipermeable or selectively permeable. An impermeable membra

Anticoagulant therapy, Anticoagulant therapy To prevent blood clottin...

Anticoagulant therapy To prevent blood clotting on the valve, patients with prosthetic valves require life long anticoagulant therapy. The patient is put on oral antico

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