The 'Big Three' are: i) Structural; ii) Functional; and iii) Regulatory. There most certainly are many others!
The two main functions of the proteins found in the plasma membrane are transport and inter-cellular communication. There are so many other roles that proteins play in the cell.
as enzymes to control the rate of reactions and regulate cellular activity
Proteins carry oxygen through the blood, and they also carry electrons throughout the body to enable reactions.
Viruses do produce cellular proteins that are necessary for viral synthesis.
Ribosomes functions as factories to produce proteins.
- Outer membrane of cell that controls cellular traffic- Contains proteins (left, gray) that span through the membrane and allow passage of materials- Proteins are surrounded by a phospholipid bi-layer
enzymesOther contributors have said "What kinds of proteins are needed for most cellular activities?" is the same question as "Which kinds of proteins are needed for most cellular activities?"good job answers.com
proteins
enzymesOther contributors have said "What kinds of proteins are needed for most cellular activities?" is the same question as "Which kinds of proteins are needed for most cellular activities?"good job answers.com
there are four functions in a cytoplasm. 1)supports and holds the cellular organelles. 2)contains proteins which aid in cell movement and cell shape. 3)helps materials move from place to place within the cell. 4)serves as the site of many cellular processes.
the edann lindsell functions
Almost every single cellular function we do is performed by proteins.