The cell wall of a plant cell is mainly made of ___. A. protein B. lipid C. cellulose D. starch 相关知识点: 试题来源: 解析 C。植物细胞的细胞壁主要由纤维素构成。A 选项蛋白质不对;B 选项脂质不是细胞壁的主要成分;D 选项淀粉也不是细胞壁的组成部分。反馈...
The cell wall of a plant cell is mainly made up of___. A. cellulose B. protein C. lipid D. starch 相关知识点: 试题来源: 解析 A。植物细胞的细胞壁主要由纤维素组成。选项 B,蛋白质不是细胞壁的主要成分;选项 C,脂质不是细胞壁的成分;选项 D,淀粉主要存在于细胞内储存能量。反馈...
As the United Nations convenes its second High-Level Meeting on antimicrobial resistance, urgent global action is needed. This Focus issue draws attention to pressing challenges of bacterial antimicrobial resistance and underscores the need for fast and coordinated international efforts. Editorial13 Sep ...
Algae, for instance, has a high fibre content that is composed mainly of insoluble fibres, cellulose and other polysaccharides found in their cell walls56. Both filamentous fungi and yeast have potentially beneficial fibres, namely \({{{\rm{\beta }}}\)-glucan and mannan-oligosaccharides, both ...
The incorporation into cell wall is carried out by a transpeptidation reaction in which the nascent peptidoglycan functions mainly as the donor and the preexisting one as acceptor. The detergent-soluble peptidoglycan is composed of partially crosslinked peptidoglycan strands as well as low-molecular-...
Venoms are the secretions produced by animals, generally for the purpose of self-defense or catching a prey. Biochemically venoms are mainly composed of proteins, lipids, carbohydrates, ions, etc., and classified into three major classes, viz. neurotoxic, hemotoxic and cytotoxic based upon their ...
There is considerable interest in the effects of the intestinal microbiota (IM) composition, its activities in relation with the metabolism of dietary substrates and the impact these effects may have in the development and prevention of certain non-communicable diseases. It is acknowledged that a com...
subtilis have been used as genetic models and thus we know a great deal about their cell wall physiology. This is an important point since only the use of bacterial genetics will reveal if and how Gram-positive bacteria and bacilli that have their PG directly exposed to the host conceal it...
The effect of ageing on the spatial compartmentalisation of bacteria in both small intestine and colon was investigated by fluorescentin situhybridization (FISH). In aged mice the thinner mucus layer was associated with increased bacterial penetrability and contact with the epithelium. For example, in...
Thus, it is clear that the bacterial communities found in lake sediments provide important ecological services to lacustrine ecosystems. In contrast to natural lake sediments, tailings produced in the process of metal mining are mainly composed of finely crushed rock, and are characterized by low ...