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

Rna molecule have two polynucleotide chains like the dna, Q Does RNA molecu...

Q Does RNA molecule have two polynucleotide chains like the DNA? Only DNA has two polynucleotide chains. The RNA is formed by just one polynucleotide chain.

What is the life cycle of the schistosome, Q. What is the life cycle of the...

Q. What is the life cycle of the schistosome? Female and Male adult schistosomes live within blood vessels of the human intestines. The females discharge eggs that trespass the

What do you know about cardiothoracic ratio, Q. What do you know about Card...

Q. What do you know about Cardiothoracic ratio? The cardiothoracic ratio (CTR) shown in figure is the transverse cardiac diameter (the horizontal distance between the most righ

Zoology, regenerstion in invertebrates

regenerstion in invertebrates

Explain what is class osteichthyes , Explain what is Class Osteichthyes ? ...

Explain what is Class Osteichthyes ? Class Osteichthyes takes its name from the Greek root "osteo," referring to bone, and "ichthys," referring to fish. The bony fish have a sk

Function of glutamate, Q. Function of Glutamate? Glutamate It is the...

Q. Function of Glutamate? Glutamate It is the principal excitatory transmitter in the brain and is found throughout the central nervous system. Receptors Glutamate rec

Six-membered oxygen-containing ring is referred as, A cyclic hemiacetal wit...

A cyclic hemiacetal with a six-membered oxygen-containing ring is referred to as a(n): Select one: a. aldehyde. b. pyranose. c. ketopentose. d. furanose. e. sorbi

Determine the types of cell, Determine the types of Cell Based OII the ...

Determine the types of Cell Based OII the degree of complexity of the cell organisation, two types of cells, namely, prokaryotes and eukaryotes, are recognised. The prokaryotic

State the term - halsted reitan varies, State the term - Halsted Reitan var...

State the term - Halsted Reitan varies with the particular test Scoring for the Halsted Reitan varies with the particular test, such that individual scores may be expressed in

Explain the working of conical flasks, Explain the working of Conical Flask...

Explain the working of Conical Flasks? Conical flasks of different volumes can be used for media preparation and also for culturing large amount of microorganisms in liquid med

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