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Chapter 28: Problem 31

Write the mRNA complement for \(5^{\prime}\)-TCAACGAT-3'.

Short Answer

Expert verified
Answer: The mRNA complement of the given DNA sequence is \(5^{\prime}\)-AGUUGC-UA-3'$.

Step by step solution

01

Identify the DNA sequence

The given DNA sequence is: \(5^{\prime}\)-TCAACGAT-3'$
02

Transcription of the DNA strand

Now, we need to transcribe the DNA strand into an mRNA sequence by using base pairing rules. The base pairing rules are: - Adenine (A) pairs with Uracil (U) - Thymine (T) pairs with Adenine (A) - Guanine (G) pairs with Cytosine (C) - Cytosine (C) pairs with Guanine (G) So, the mRNA complement of the DNA sequence will be: - Thymine (T) -> Adenine (A) - Cytosine (C) -> Guanine (G) - Adenine (A) -> Uracil (U) - Adenine (A) -> Uracil (U) - Cytosine (C) -> Guanine (G) - Guanine (G) -> Cytosine (C) - Adenine (A) -> Uracil (U) - Thymine (T) -> Adenine (A)
03

Write the mRNA complement sequence

By following the base-pairing rules, we get the mRNA complement as \(5^{\prime}\)-AGUUGC-UA-3'$

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Most popular questions from this chapter

$$ \text { Write the complementary DNA base sequence for } 5^{\prime}-\mathrm{CCGTACGA}-3^{\prime} \text {. } $$

Compare the \(\alpha\)-helix of proteins and the double helix of DNA in these ways. (a) The units that repeat in the backbone of the polymer chain. (b) The projection in space of substituents along the backbone (the \(R\) groups in the case of amino acids; purine and pyrimidine bases in the case of double- stranded DNA) relative to the axis of the helix.

List the postulates of the Watson-Crick model of DNA secondary structure.

The following section of DNA codes for oxytocin, a polypeptide hormone. $$ \text { 3'ACG-ATA-TAA-GTT-TTA-ACG-GGA-GAA-CCA-ACT-5' } $$ (a) Write the base sequence of the mRNA synthesized from this section of DNA. (b) Given the sequence of bases in part (a), write the primary structure of oxytocin.

Compare the structural formulas of the aromatic amino acids phenylalanine and tyrosine. Compare also the codons for these two amino acids.
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