Since late 1980s, a few Chinese artists have branched out traditional Chinese calligraphy to a new territory by mingling Chinese characters with English letters; notable new forms of calligraphy are Xu Bing's square calligraphy and DanNie's coolligraphy or cooligraphy.
Confidence votes 62. In one method, transport proteins in the cell membrane pick up molecules outside the cell and carry them in, using energy. Transport proteins also carry molecules out of cells in a similar way. In one method, transport proteins in the cell membrane pick up molecules outside the cell and carry them in, using energy.
Active transport requires chemical energy because it is the movement of biochemicals from areas of lower concentration to areas of higher concentration. Passive transport moves biochemicals from areas of high concentration to areas of low concentration; so it does not require energy. What functions do carrier proteins perform in active transport? Carrier proteins allow molecule to bind to them; they change their shape to transport material across the cell membrane.