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5’ TTAGCG 3’

Which of the following nucleotide base sequences complements the section of DNA modeled above?

5’ UTCGCA 3’
3’ AATCGC 5’
5’ GCGATT 3’
5’ TTUCGC 3’

Respuesta :

Manetho

The given DNA sequence is 5’ TTAGCG 3’ . According to Chargaff's rules state that Adenine is always pairs with thymine and guanine is always pair with cytosine. So in the given sequence 5’ TTAGCG 3’ the nucleotide base sequences complements the section of DNA is 3’ AATCGC 5’. Hence, option 2 is correct ,because it follows chargaff's rules and complementry strand always read in 3' to 5' as DNA sequence present in 5' to 3'.

Answer:

Option B is correct. The 5' TTAGCG 3' will complement with 3' AATCGC 5'.

Explanation:

In dsDNA one strand is 5'-3' while other is 3'-5'.

According to the complementarity rule

  • the Adenine(A) always bond with Thymine(T)
  • Guanine(G) always bond with Cytosine(C).

Options other than B are 5'-3' same as first strand. Hence Option A,C, and D can be eleminated.

Therefore 5' TTAGCG 3' will complement with 3' AATCGC 5'.

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