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N76 [4]
3 years ago
13

The thin, leaf-shaped structure that covers the entrance of the larynx when the individual swallows is the .

Biology
1 answer:
d1i1m1o1n [39]3 years ago
3 0
Epiglottis

The epiglottis is a flap of cartilage the covers the entrance to the throat protecting the lungs from obstruction.  It moves when we swallow to allow food in.  
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where they execute important functions. The polypeptide chain of these proteins must cross the lipid bilayer. This presents a pr
spin [16.1K]

Answer:

In this case, it is likely that the polypeptide chain assumed an alpha helix configuration because the lipid bilayer did not have beta-barrel proteins.

Explanation:

A polypeptide chain is naturally polar, however, a lipid bilayer is naturally non-polar. This makes it difficult and even prevents the polypeptide chain from crossing a lipid bilayer, since the composition of these two elements does not allow them to mix. In that case, the polypeptide chain has two options to take to successfully cross the lipid bilayer.

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