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Alex Ar [27]
3 years ago
7

Please Help

Chemistry
1 answer:
Yuri [45]3 years ago
5 0
I believe it is A because a physical change is something that can be changed back to where a chemical change can not be such as burning something.
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Alpha helices are a type of secondary structure in proteins. What is the length of a 27.0 kDa single‑stranded α‑helical protein
iogann1982 [59]

Answer : The  length of protein will be, 36.8 A⁰

Explanation :

First we have to calculate the amino acid residue.

\text{Amino acid residue}=\frac{\text{Length of single strand of protein}}{\text{Mean residue mass}}

Given:

Length of single strand of protein = 27.0 kDa

Mean residue mass = 110 Da

\text{Amino acid residue}=\frac{27.0kDa}{110Da}=\frac{27000Da}{110Da}=245.4

Now we have to calculate the number of turns in protein.

\text{Number of turns in protein}=\frac{\text{Amino acid residue}}{3.6\text{amino acid per turn of the alpha-helix}}

As there are 3.6 amino acid per turn of the alpha-helix.

\text{Number of turns in protein}=\frac{245.4}{3.6}=68.17

Now we have to calculate the length of the protein.

\text{Length of protein}=\text{Number of turns in protein}\times \text{Length of each turn}

As, we know that the length of each turn = 0.54 A⁰

\text{Length of protein}=68.17turns\times 0.54\AA=36.8\AA

Thus, the length of protein will be, 36.8 A⁰

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The only way to break the bonds in a compound is with a
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Answer:

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Answer:

Explanation:

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Each reaction has its <u>specific characteristics</u> (see figures 1 and 2).

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