barm - a commercial leavening agent containing yeast cells; used to raise the dough in making bread and for fermenting beer or whiskey. yeast. yeast cake - small cake of compressed moist yeast. brewer's yeast - yeast used in fermenting beer. leaven, leavening - a substance used to produce fermentation in dough or a liquid. mother - a stringy slimy substance consisting of yeast cells and bacteria; forms during fermentation and is added to cider or wine to produce vinegar.
No. Being that viruses are not a living organism, they are neither contain cells, nor are they a cell themselves. Viruses are merely few macromolecules (such as nucleic acid and protein) which combines to form a pathogenic particle.dit: a cell wall-as the name implies-is a part of a cell. Viruses are not cells. â¦ Cells are living, viruses are not.
All cells have a cell membrane and the cytoplasm (liquid medium). A nucleus is found in eukaryotic cells, along with various organelles such as ribosomes, vacuoles and mitochondria.Viruses have neither, and instead have a protein coat and a structure, usually a tail, that can penetrate a living cell.owever plant cells, in addition to the cell membrane also have the cell wall outside the cell membrane. This provides mechanical rigidity to the cell and prevents the flow of larger particles. 7 people found this useful.