Once <u>hydrogen</u> bonds form between every fourth amino acid in a polypeptide chain, the chain begins to twist into the <u>secondary</u> structure known as a(n) <u>alpha helix</u>.
<h3>
What is Amino Acid ? </h3>
Amino acids are organic compound. Amino acids contains amine and carboxyl functional group. Amino acids is the building block of life these are the molecules that combine to form proteins.
<h3>What is Polypeptide Chain ? </h3>
A unique sequence of amino acids joined by peptide bonds is called polypeptide.
Thus from the above conclusion we can say that Once <u>hydrogen</u> bonds form between every fourth amino acid in a polypeptide chain, the chain begins to twist into the <u>secondary</u> structure known as a(n) <u>alpha helix</u>.
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It is possible to turn aldehydes and ketones into alkenes via the Wittig reaction.
<h3><u>What is wittig reaction ?</u></h3>
- The Wittig Reaction: It is possible to turn aldehydes and ketones into alkenes via the Wittig reaction, which is a practical process.
- Georg Wittig, its creator, received the 1979 Nobel Prize in Chemistry for it (along with the father of hydroboration, H.C. Brown).
- A carbonyl molecule (aldehydes and ketones both function, but esters or amides do not) and a fairly peculiar-looking species known as a ylide are the two ingredients in this reaction. (more precisely, a "phosphonium ylide," as there are also ylides of nitrogen and sulfur).
- An ylide is a species having opposing formal charges on nearby atoms, according to technical definition. The ylide, which we shown above with a double bond between carbon and phosphorus, also has a significant resonance form with a positive charge on phosphorus and a negative charge on carbon.
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PH becomes lower when the H+ ion concentration increases.
<span>pH becomes higher when the H+ ion concentration decreases. </span>
<span>pH becomes lower when the OH- ion concentration decreases. </span>
pH becomes higher when the OH- ion concentration increases.
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Answer:
There are 27 Valence electrons : )
4+1+1+1+6+4+1+1+4+1+1+1 is 27
Answer:
Since 1961 the standard unit of atomic mass has been one-twelfth the mass of an atom of the isotope carbon-12. An isotope is one of two or more species of atoms of the same chemical element that have different atomic mass numbers (protons + neutrons).
isotope carbon-12
Explanation: