Answer:
<u>D. They are usually transmembrane proteins</u>
Explanation:
Membranes are made up of a phospholipid bilayer, cholesterol and various mimbrane proteins. The lipids consist of outward facing hydrophilic heads and inwards facing hydrophobic tails. Cholesterol molecules help maintain membrane fluidity.
Transmembrane proteins play an important role. These help to transport various molecules and ions like glucose, and Na+ across the selectively permeable bilayer. These are permanently embedded within the membrane as integral membrane proteins, and do not move around.
<span>TIM is the protein that might be involved with this process. This type of protein is a protein of the transmembrane immunoglobulin and mucin domain. This type of protein is expressed by multiple cell types within the immune systems of rodents and humans.</span>
<span>This is not effective, because finding the cause of a substance-related disorder is not as important as treating the abuse as an independent problem. Treating it individually shows the person that they can have more power over their problem instead of using a reason of why it occurred to enable him or her further.</span>
<span>a. What is one adaptation of a mangrove tree species that allows it to survive in its environment?
Answer: </span><span>Two key </span>variations they need are the flexibility<span> to survive in </span>wet<span> and </span>hypoxia<span> (no oxygen) soil, </span>and therefore the<span> ability to tolerate </span>briny<span> waters. Some mangroves </span>take away<span> salt from </span>briny water<span> waters through ultra-filtration in their roots.</span>
I believe the correct answer from the choices listed above is the second option. <span>The field of vision of an electron microscope is brightly illuminated and used for most microscopic work.</span> Hope this answers the question. Have a nice day.