Answer:
Because proteins and lipid tails are free to move and are not bonded by strong interactions with each other.
Explanation:
The plasma membranes have two layers of phospholipids in which proteins are present. The hydrophobic fatty acid tails of phospholipid layers make the inner core of the membranes. However, the tails are not bonded to each other and make a fluid-like base in which proteins are present. Also, the membrane proteins are not bonded to the phospholipids and are free to change their position within the phospholipid leaflets. This is why the model is described as a fluid mosaic model.
Of the annual global total of fixed nitrogen, human activities account for roughly 45%.
Nitrogen fixation is the global amount of nitrogen that gets assimilated by any living organism into another organic compound. The organic compound can be ammonia or nitrogen ions.
Of the total global annual nitrogen fixation, humans account for a great amount. The current estimation is that humans cause 45% of the nitrogen fixation annually. The leading causes of this high rate are the burning of fossil fuels and increased agricultural fertilizer use.
To learn more visit:
brainly.com/question/7049583?referrer=searchResults
I think A in am not a 100%sure tell me if I am wrong.
Answer:
Lateral interactions between protofilaments are in general homotypic. The heterotypic interactions are weaker because these interactions involve the mix of different protofilaments within the microtubule
.
Explanation:
Microtubules are cytoskeletal polymers that are formed by tubulin dimers in a head-to-tail arrangement (protofilaments).
