The largest and most sophisticated molecules in a cell are nucleic acids.
The largest amount of RNA in a cell can be found in the nucleus, where most of the cell's genetic material is stored and transcribed into RNA molecules. This includes messenger RNA (mRNA) that carries instructions for protein synthesis, as well as other types of RNA involved in various cellular processes.
If the concentration of molecules is higher inside the cell compared to outside, water would move into the cell to dilute the higher concentration of molecules. This may cause the cell to swell or burst. If the concentration of molecules is higher outside the cell, water would move out of the cell causing it to shrink or shrivel. The movement of water is driven by osmosis, which aims to equalize the concentration of molecules inside and outside the cell.
The cell membrane, which surrounds the cell and is responsible for which molecules are allowed to diffuse into or out of the cell and which molecules are impermeable to the membrane
The net movement of molecules into cells is most dependent upon the concentration gradient of the molecules, the size of the molecules, and the permeability of the cell membrane. Additionally, factors such as temperature and pressure can also influence the rate of molecular movement into cells.
Small and nonpolar molecules such as oxygen, carbon dioxide, and ethanol pass through a cell membrane most easily, as they can diffuse across the lipid bilayer without the need for transport proteins.
DNA is a chemical compound. It forms the largest single molecules inside cells (and most viruses) and stores the information used to make and operate the cell.
The largest amount of RNA in a cell can be found in the nucleus, where most of the cell's genetic material is stored and transcribed into RNA molecules. This includes messenger RNA (mRNA) that carries instructions for protein synthesis, as well as other types of RNA involved in various cellular processes.
1) holds in the molecules that allow the cell to function (to be alive). 2) keeps out most foreign molecules. 3) "contains" transport molecules that move specific molecules in and out.
1) holds in the molecules that allow the cell to function (to be alive). 2) keeps out most foreign molecules. 3) "contains" transport molecules that move specific molecules in and out.
If the concentration of molecules is higher inside the cell compared to outside, water would move into the cell to dilute the higher concentration of molecules. This may cause the cell to swell or burst. If the concentration of molecules is higher outside the cell, water would move out of the cell causing it to shrink or shrivel. The movement of water is driven by osmosis, which aims to equalize the concentration of molecules inside and outside the cell.
The cell membrane, which surrounds the cell and is responsible for which molecules are allowed to diffuse into or out of the cell and which molecules are impermeable to the membrane
The largest molecules in organisms are typically nucleic acids, specifically DNA and RNA. These molecules are composed of long chains of nucleotide units that carry genetic information and are essential for various cellular functions.
Jedi Master Yoda is the most sophisticated fighter.
This means that there are more facets to 'trans' membrane molecular movement than {merely} diffusion - which is the simplest. The smallest of molecules pass both ways unimpeded. Medium sized bio-molecules are permitted transit via facilitated diffusion; while the largest and most biologically active bio-molecules are selectively accepted or refused at any of a Myriad of Cell Membrane structures that are known [in short] as Cell Surface Receptors.
This means that there are more facets to 'trans' membrane molecular movement than {merely} diffusion - which is the simplest. The smallest of molecules pass both ways unimpeded. Medium sized bio-molecules are permitted transit via facilitated diffusion; while the largest and most biologically active bio-molecules are selectively accepted or refused at any of a Myriad of Cell Membrane structures that are known [in short] as Cell Surface Receptors.
This means that there are more facets to 'trans' membrane molecular movement than {merely} diffusion - which is the simplest. The smallest of molecules pass both ways unimpeded. Medium sized bio-molecules are permitted transit via facilitated diffusion; while the largest and most biologically active bio-molecules are selectively accepted or refused at any of a Myriad of Cell Membrane structures that are known [in short] as Cell Surface Receptors.
This means that there are more facets to 'trans' membrane molecular movement than {merely} diffusion - which is the simplest. The smallest of molecules pass both ways unimpeded. Medium sized bio-molecules are permitted transit via facilitated diffusion; while the largest and most biologically active bio-molecules are selectively accepted or refused at any of a Myriad of Cell Membrane structures that are known [in short] as Cell Surface Receptors.