In this article we will discuss about the molecular structure of proteins with the help of diagrams. Quantitatively, proteins are the chief organic components of most living organisms, as also of viruses. About 50% of the dry weight of bacterial cells is protein. The flagella, pili and fimbriae are made up entirely of proteins, and the cell membrane, cytoplasm, ribosomes [...]
The below mentioned article provides notes on autotrophic metabolism. Autotrophy generally means the ability of organisms to use inorganic carbon in the form of CO2 as the sole source of carbon for synthesizing organic compounds necessary to build cell components. This ability is also sometimes called carbon-autotrophy to distinguish the ability of some organisms to use molecular nitrogen as the [...]
The following points highlight the five processes involved in transport of molecules across cell membrane. The processes are: 1. Passive Diffusion 2. Facilitated Diffusion 3. Active Transport 4. Group Translocation 5. Ion Transport through Ionophores. Process # 1. Passive Diffusion: By passive diffusion, molecules move across the membrane without interacting with any specific carrier protein in the cell membrane. The [...]