Question

Yeast cell
1
Fig. 12.5 Reproduction in yeast by budding​

Answer 1

Answer:

How budding occurs in yeast?

Yeast cells reproduce asexually by an asymmetric division process called budding. In yeast, budding usually occurs during the abundant supply of nutrition. In this process of reproduction, a small bud arises as an outgrowth of the parent body. ... The newly created bud divides and grows into a new cell.

Explanation:

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Answer 2

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Answer:

Yeasts are eukaryotic micro-organisms. The most common mode of vegetative growth in yeast is asexual reproduction by budding. Here, a small bud or daughter cell, is formed on the parent cell. The nucleus of the parent cell splits into a daughter nucleus and migrates into the daughter cell. The bud continues to grow until it separates from the parent cell, forming a new cell.

Explanation:

Yeasts reproduce asexually either by fission or by budding. Depending on this character they are grouped as fission yeasts, Schizosaccharomyces and budding yeasts, Zygosaccharomyces.

During reproduction of fission yeasts the parent cell elongates, the nucleus divides into two daughter nuclei, and gradually a transverse partition wall is laid down somewhat near the middle starting from periphery to the centre dividing the mother cell into two daughter cells

The two daughter cells so formed may remain together for some time and begin to divide again or they may separate soon and then divide.

Stages in cell multiplication by fusion

Budding yeasts are rather common than the fission yeasts. At the commence­ment of budding a small portion of the cell wall, usually near the end, softens. The nucleus of the mother, cell, according to- some, divides mitotically. One of the two daughter nuclei migrates into the enlarging bud. The bud grows until it attains the size of the mother cell

The daughter cell then becomes separated from the mother cell and the process may be repeated indefinitely Others suggest that when the yeast cell buds its nucleus appears to divide by constriction and the nuclear envelope does not break down.

Stages in cell multiplication by budding

The cytoplasmic connection is closed by the lying down of wall material. Eventually the bud separates from the parent cell leaving a bud scar Quite often the daughter cell also starts producing bud before being abstricted from the mother cell and the process may be repeated giving rise to chains or groups of yeast cells.

In this way a large number of buds are developed without being detached from one another resulting in the formation of branched or unbranched chains of cells constituting the pseudomycelium. The cells in chains for pseudomycelium are loosely joined together. Sooner or later, however, the chains break into their constituent cells

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