Question

In: Biology

Life cycle of Yeast

Explain the life cycle of Saccharomyces cerevisiae (yeast) by illustrating with diagram.

 

 

Solutions

Expert Solution

  • LIFE CYCLE OF SACCHAROMYCES CEREVISIAE (YEAST):

    The yeast is a one-celled ascomycete fungus which includes in its life cycle two morphologically identical diploid and haploid generations that alternate with each other.
  • The diploid adult usually multiplies by budding in which the nuclei divide by mitosis, but under certain environmental conditions they undergo meiosis to form four monoploid meiospores or ascospores within the old cell wall which now called ascus.
  • The ascospores are liberated from the ascus and each ascospore germinates into a monoploid adult cell.
  • Out of four ascospores two develop into adults of + mating type, while rest two develop into adults of-mating type.
  • Sometime two yeast cells of opposite strains contact and an inter-cellular cytoplasmic bridge is formed between the two cells.
  • Both cells ultimately fuse (plasmogamy) and their nuclei also fuse to form a diploid nucleus (karyogamy).
  • The resultant vegetative cell repeats the same life cycle.

Life cycle of Yeast


Saccharomyces cerevisiae :

  • This is a species of yeast.
  • This species has been instrumental in winemaking, baking, and brewing since ancient times.
  • It is originally isolated from the skin of grapes.

Related Solutions

In the life cycle of a dinoflagellate shown, the sexual part of the life cycle depicts a
In the life cycle of a dinoflagellate shown, the sexual part of the life cycle depicts a 1. Zygotic life cycle 2. Gametic life cycle 3. Clonal life cycle 4. Sporic life cycle
stages of life cycle cost with definition effects of life cycle costing
stages of life cycle cost with definition effects of life cycle costing
E.coli life cycle
Explain and give a breif account of the life cycle of E.coli.
EHR Life Cycle
EHR Life Cycle
Chlamydomonas life cycle
Give a brief account of the life cycle of Chlamydomonas with the labelled diagram.
Life cycle of a Bryophyte
Give a brief description of the life cycle of some plants. Give the schematic diagram of the life cycle of a Bryophyte.
What is a project life cycle? Explain the importance of the project life cycle to project...
What is a project life cycle? Explain the importance of the project life cycle to project management. Define the phases of project life cycle and identify the most critical phase of project life cycle in your opinion. Support your answers with appropriate examples.
What are the stages of a Microsoft's life cycle? How can a Microsoft's life cycle be...
What are the stages of a Microsoft's life cycle? How can a Microsoft's life cycle be extended? What stage is your company in?
What are the phases in a traditional project life cycle? How does a project life cycle...
What are the phases in a traditional project life cycle? How does a project life cycle differ from a product life cycle? Why does a project manager need to understand both?
Draw the Product Life Cycle figure of Samsonite, in which stage of the Product Life Cycle...
Draw the Product Life Cycle figure of Samsonite, in which stage of the Product Life Cycle is Samsonite currently standing? How can the company extend its life cycle?
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT