porter
A membrane protein that functions to transport substances into and out of the cell.
Dictionary > Porter
You will also like...

Abiotic Factors – Water Conditions
A still body of water may be disturbed by a variety of factors. One of them is wind. In fact, it is considered as the pr..

Human Reproduction
Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..

Freshwater Communities & Plankton
Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..

Sensory Systems
A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..

New Zealand’s Unique Geographical History
Explore why New Zealand has such unique flora and fauna, and learn why long periods of geographical isolation. This less..

Insects
There are more species of insects than any other species combined. This surely illustrates that insects have the selecti..