Một gen có 4800 nucleotit, tỉ lệ $\frac{A+T}{G+X}$ = $\frac{23}{27}$ . Số nucleotit loại A của gen là

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  The problem of violence on screen is ____________, so many people who are ____________ with it are very ___________. 
   

• Choose the best answer for the following sentence:

  The director is ___________ English but his wife is ____________ Swede.
  
  

• Choose the best answer for the following sentence:

  I am bored up with watching ___________ films all ____________ time.
   

• Choose the best answer for the following sentence:

  It is __________ films that help us widen our knowledge of cultures, coun-tries, and people.
   

• Choose the best answer for the following sentence:

  I would rather read books _____________ go to the cinema.
   

• Choose the best answer for the following sentence:

  Which is ___________, films or plays?
   

• Choose the best answer for the following sentence:

  These teenagers ____________ action movies to cartoons.
   

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

  honor                    hold                    health                   host

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

  trophy                      women                      control                    most

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

  record                      acute                       country                      participate