2. The sequence of starting region of one DNA gene is shown: 5' GCATATGGCTTTTCCGCCGCGGCGACGGCTGCGC 3'. 1) Please write down the sequence of the complementary strand (the template strand) in the 5' to 3' direction. 2) If the template strand is used as a template for transcription, what is the sequence of the resulting mRNA? 3) From this sequence, please figure out the first codon in protein synthesis. 4) If the mRNA is used for translation, please figure out the polypeptide sequence (starting from the first codon). 5) If one nucleotide is mutated, and resulting sequence is: 5' GCATATGGCTTTTCGGCCGCGGCGACGGCTGCG C 3'. What is the polypeptide sequence? Please explain what type of mutation this is.

Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
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**Transcription of DNA Sequence Analysis for Educational Website**

---

**DNA Sequence Analysis**

2. The starting region of a DNA gene is represented by the sequence:
   ```
   5’ GCATATGGCTTTTCCGCCGCGGCGGACGGCTGCGC 3’
   ```

**Questions:**

1. **Complementary Strand Sequence:**
   - Write the sequence of the complementary (template) strand in the 5’ to 3’ direction.

2. **mRNA Sequence:**
   - If the template strand is used for transcription, what is the sequence of the resulting mRNA?

3. **First Codon Identification:**
   - From the mRNA sequence, identify the first codon involved in protein synthesis.

4. **Polypeptide Sequence:**
   - If the mRNA is used for translation, determine the polypeptide sequence starting from the first codon.

5. **Mutation Analysis:**
   - If one nucleotide is mutated, resulting in the sequence:
     ```
     5’ GCATATGGCTTTTCGCCGCGGCGGACGGCTGCGC 3’
     ```
   - What is the polypeptide sequence? Explain the type of mutation this is.

**Note:**
- Such exercises help students understand DNA transcription and translation processes, identify codons, and interpret the effects of mutations on genetic sequences.
Transcribed Image Text:**Transcription of DNA Sequence Analysis for Educational Website** --- **DNA Sequence Analysis** 2. The starting region of a DNA gene is represented by the sequence: ``` 5’ GCATATGGCTTTTCCGCCGCGGCGGACGGCTGCGC 3’ ``` **Questions:** 1. **Complementary Strand Sequence:** - Write the sequence of the complementary (template) strand in the 5’ to 3’ direction. 2. **mRNA Sequence:** - If the template strand is used for transcription, what is the sequence of the resulting mRNA? 3. **First Codon Identification:** - From the mRNA sequence, identify the first codon involved in protein synthesis. 4. **Polypeptide Sequence:** - If the mRNA is used for translation, determine the polypeptide sequence starting from the first codon. 5. **Mutation Analysis:** - If one nucleotide is mutated, resulting in the sequence: ``` 5’ GCATATGGCTTTTCGCCGCGGCGGACGGCTGCGC 3’ ``` - What is the polypeptide sequence? Explain the type of mutation this is. **Note:** - Such exercises help students understand DNA transcription and translation processes, identify codons, and interpret the effects of mutations on genetic sequences.
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