I think the correct answer from the choices listed above is option A. The structural level of a protein least affected by a disruption in hydrogen bonding is the primary level. The other levels are very much affected by hydrogen bonding. Hope this answers the question.
        
             
        
        
        
Answer:
Single Displacement reaction  
In a displacement reaction, a more reactive element replaces a less reactive element from a compound.
Change in colour takes place with no precipitate forms.	
Metals react with the salt solution of another metal.
Examples:
 2KI + Cl2 → 2KCl + I2 
CuSO4 + Zn → ZnSO4 + Cu 
Double displacement reaction
In a double displacement reaction, two atoms or a group of atoms switch places to form new compounds.
Precipitate is formed.
Salt solutions of two different metals react with each other.
Examples:  
Na2SO4 + BaCl2 → BaSO4 + 2NaCl
2KBr + BaCl2 → 2KCl + BaBr2 
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Answer:
To calculate the number of atoms in a sample, divide its weight in grams by the amu atomic mass from the periodic table, then multiply the result by Avogadro's number: 6.02 x 10^23. Set up Equation Express the relationship of the three pieces of information you need to calculate the number of atoms in the sample in the form of an equation.
 
        
             
        
        
        
Answer:
Mass of P4O6=103.4
             P4O10=133.48
Explanation:
Balanced reaction is:
 8P +8 ⇒
  ⇒ +
 + 
 
Both reactant completely vanishes as equivalent of bot are equal.
Moles of P= =3.80
 =3.80
Moles of  =
 = =3.80
 =3.80
No. of moles of formed product are equal and is  th of mole of any of reactant.
th of mole of any of reactant.
Thus weight of   =
 = ×220 ≈103.41
×220 ≈103.41
         weight of   =
 = ×284 ≈133.48
×284 ≈133.48