A. Immune system
It helps our bodies fight everything that comes in our path.
<span>Can work more efficiently because they have cells organized into tissues to do
certain jobs (functions)
Can live in a wide variety of environments because they can be moist on the inside
and dry on the outside</span>
The correct answer is: They usually have one or more helical regions spanning the membrane bilayer
Transmembrane proteins are type of integral proteins meaning that they are permanently attached to biological membrane. Transmembrane proteins span through the plasma membrane so most of their structure is hydrophobic.
The major role of these proteins is transport role: they act as a channels that undergo conformational change in order to move a substance through the membrane.
Classified by their structure they can be put into two types: alpha helical and beta barrels.
Answer:
first one is a
Explanation:
did you complete the quiz?
The definition of homology is the existence of shared ancestry between a pair of structures, or genes. DNA contains the genes of a person therefore making itself a homology.
I hope this helped you hon :)