Question

Identify the DNA segment from which this section of mRNA was transcribed. (6 points)  A  T  C  G  U

Answer 1

To identify the DNA segment for the mRNA sequence 5'-AUGCUGAAUUGCGUAGGA-3', the complementary DNA segment is 3'-TACGACTTAACGCATCCT-5'. During transcription, DNA and RNA nucleotides pair up (A with U, and G with C) to form the messenger RNA, which is then translated into an amino acid sequence.

Step-by-step explanation:

To identify the DNA segment from which the given section of mRNA was transcribed, we need to recall that during transcription, DNA serves as a template to form mRNA. The bases of DNA pair with the RNA bases following the rules of base pairing: adenine (A) pairs with uracil (U) in RNA, and guanine (G) pairs with cytosine (C). Additionally, thymine (T) in DNA pairs with adenine (A) in mRNA.

For the mRNA sequence 5'-AUGCUGAAUUGCGUAGGA-3', the complementary DNA sequence would be the reverse complement, as follows:

• mRNA A pairs with DNA T
• mRNA U pairs with DNA A
• mRNA G pairs with DNA C
• mRNA C pairs with DNA G

Thus, the complementary DNA segment is 3'-TACGACTTAACGCATCCT-5'.

To decode the mRNA sequence into the corresponding amino acid sequence, we must align each triplet of bases, called a codon, with its corresponding amino acid according to the genetic code. Translating the mRNA sequence 5'-AUGCUGAAUUGCGUAGGA-3' would provide a sequence of amino acids, which are the building blocks of proteins. This process takes place in a ribosome during translation.

Answer 2

The corresponding sequence of the transcribed mRNA is AGGUAUCGCAU. Hence the correct option is 1.

The DNA coding strand sequence is AGGTATCGCAT. During transcription, the complementary mRNA sequence is synthesized according to the base-pairing rules: Adenine (A) in DNA pairs with Uracil (U) in RNA, Thymine (T) in DNA pairs with Adenine (A) in RNA, Cytosine (C) in DNA pairs with Guanine (G) in RNA, and Guanine (G) in DNA pairs with Cytosine (C) in RNA.

Applying these rules:

A in DNA pairs with U in RNA.

G in DNA pairs with C in RNA.

G in DNA pairs with C in RNA.

T in DNA pairs with A in RNA.

A in DNA pairs with U in RNA.

T in DNA pairs with A in RNA.

C in DNA pairs with G in RNA.

G in DNA pairs with C in RNA.

C in DNA pairs with G in RNA.

A in DNA pairs with U in RNA.

T in DNA pairs with A in RNA.

Therefore, the correct corresponding mRNA sequence is AGGUAUCGCAU. Hence the correct option is 1.

Complete ques:

AGGTATCGCAT is a sequence from the coding strand of gene. What will be the corresponding sequence of the transcribed mRNA?

1. AGGUAUCGCAU
2. UCCAUAGCGUA
3. ACCUAUGCGAU