Question

In Yeast, the cell wall contains:
A. Amylose and glucose
B. Glucose and mannose
C. Glucose and muramic acid
D. Sucrose and mannose

Answer 1

Hint: Yeast belongs to kingdom fungi. It is a unicellular, eukaryotic organism. The cell wall of yeast cells is made up of many components as it acts as a protective layer for the cell and also serves as a rigid wall that defines the shape of yeast cells.

Complete answer: Fungi are eukaryotic organisms as they contain membrane-bound organelles and cell membranes surrounded by a rigid cell wall. The fungus cell contains a lipid bilayer cell membrane with proteins embedded with it and sterols. The fungal cell wall is made up of 80 to 90 percent of polysaccharides. Fungi occur in two basic forms or growth stages; Hyphae and Yeast.
Hyphae are multicellular and have vegetative filamentous growth. Hyphae grow in one direction and can form networks of filaments by fusing. This network is known as mycelium. These can be septate (divide) or non-septate. Yeast is a single cellular organism and grows by increasing the volume of the cell. This cell further divides by mitosis and then it may follow either fission or budding pattern for growth.
In Yeast, cell walls contain various polysaccharides like a polymer of glucose called glucans (30 to 60 percent), a polymer of mannose called mannan, and a polymer of n-acetyl glucosamine called chitin.
Hence, the correct answer is option B.

Note: The yeast is a very diverse group of organisms and is placed in both the phyla i.e. in the phylum Ascomycota and phylum Basidiomycota. During budding, yeast grows a small bud which at a particular stage gets separated. But in some environmental conditions, the yeast cell fails to divide the bud, and hence keep on growing, forming a chain of yeast cells known as pseudohyphae.