In order to cross the hydrophobic interior of the bilayer, water-soluble molecules (those that are either charged or have polar groups) and large molecules require the action of membrane transport proteins. These integral membrane proteins provide a continuous protein-lined pathway through the bilayer.
Directory. A directory is a location for storing files on your computer. Directories are found in a hierarchical file system, such as DOS, OS/2, Unix, etc. When referring to a directory, a user commonly indicates the name of the directory.owever, a directory and folder are synonymous. Below is an example of what a directory path would look like in MS-DOS. In the above example, C: is the drive letter and the current directory is System32, which is a subdirectory of the Windows directory.
The /var Directory. /var is a standard subdirectory of the root directory in Linux and other Unix-like operating systems that contains files to which the system writes data during the course of its operation. The root directory is the directory that contains all other directories and files on a system and which is designated by a forward slash ( / ).