Thủy phân không hoàn toàn peptit Y mạch hở, thu được hỗn hợp sản phẩm trong đó có chứa các đipeptit Gly-Gly và Ala-Ala. Để thủy phân hoàn toàn 1 mol Y cần 4 mol NaOH, thu được muối và nước. Số công thức cấu tạo phù hợp của Y là  :

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  Although the pilot was badly hurt, he _____________ explain what had happened.
  
  

• Choose the best answer for the following sentence:

  ______________ speak two foreign languages, aren’t you?

   

• Choose the best answer for the following sentence:

  The first person to eat and drink in ______________ was a Soviet cosmonaut.

   

• Choose the correct sentence which is built from the words and phrases given:

  We / try / hard / but / not / persuade / him / go / us
  
  

• Choose the correct sentence which is built from the words and phrases given:

  John / not / look / where / he / go
   

• Choose the word that has the underlined part pronounced differently from the rest:

  behaved             coughed              missed              looked

• Choose the word that has the underlined part pronounced differently from the rest:

  arrives              purposes              structures               centuries

• Choose a word that has different stress pattern:

  wheelchair              consist               enclose              proceed

• Choose the best answer for the following sentence:

  He is supposed _____________ disguised as a woman.
   

• Choose the best answer for the following sentence:

  People ____________ that he was jealous of her.