3. DNA $$ \rightarrow $$ TAC CTT GGG GAA TAT ACA CGC TGG CTT CGA TGA ATC CGT ACG GTA CTC GCC ATC mRNA $$ \rightarrow $$ protein $$ \rightarrow $$

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Sure, let's transcribe the given DNA sequence into mRNA and then translate it into the corresponding protein. We'll follow these steps:

1. **Transcription**: Convert the DNA sequence into mRNA by replacing each nucleotide with its complementary RNA nucleotide.
2. **Translation**: Translate the mRNA sequence into a protein sequence using the standard genetic code.

### 1. Given DNA Sequence

```
5' TAC CTT GGG GAA TAT ACA CGC TGG CTT CGA TGA ATC CGT ACG GTA CTC GCC ATC 3'
```

### 2. Transcription: DNA → mRNA

During transcription, each DNA nucleotide is paired with its complementary RNA nucleotide:

- **A** (Adenine) → **U** (Uracil)
- **T** (Thymine) → **A** (Adenine)
- **C** (Cytosine) → **G** (Guanine)
- **G** (Guanine) → **C** (Cytosine)

**mRNA Sequence:**

```
5' UAC CUU GGG GAA UAU ACA CGC UGG CUU CGA UGA AUC CGU ACG GUA CUC GCC AUC 3'
```

**Breaking it down into codons:**

```
UAC | CUU | GGG | GAA | UAU | ACA | CGC | UGG | CUU | CGA | UGA | AUC | CGU | ACG | GUA | CUC | GCC | AUC
```

### 3. Translation: mRNA → Protein

Using the **standard genetic code**, each codon corresponds to a specific amino acid:

| mRNA Codon | Amino Acid (Three-Letter) | Amino Acid (One-Letter) |
|------------|----------------------------|-------------------------|
| UAC        | Tyrosine                   | Y                       |
| CUU        | Leucine                    | L                       |
| GGG        | Glycine                    | G                       |
| GAA        | Glutamic Acid              | E                       |
| UAU        | Tyrosine                   | Y                       |
| ACA        | Threonine                  | T                       |
| CGC        | Arginine                   | R                       |
| UGG        | Tryptophan                 | W                       |
| CUU        | Leucine                    | L                       |
| CGA        | Arginine                   | R                       |
| UGA        | **Stop**                   | *-*-*                   |
| AUC        | Isoleucine                 | I                       |
| CGU        | Arginine                   | R                       |
| ACG        | Threonine                  | T                       |
| GUA        | Valine                     | V                       |
| CUC        | Leucine                    | L                       |
| GCC        | Alanine                    | A                       |
| AUC        | Isoleucine                 | I                       |

**Translating the mRNA sequence:**

```
UAC CUU GGG GAA UAU ACA CGC UGG CUU CGA UGA AUC CGU ACG GUA CUC GCC AUC
 Y    L   G    E    Y    T    R    W    L    R   Stop  I   R    T    V    L    A    I
```

**Protein Sequence:**

```
Y - L - G - E - Y - T - R - W - L - R - *
```

Or using one-letter amino acid codes:

```
Y L G E Y T R W L R *
```

**Explanation:**

- The translation process starts at the first codon and continues sequentially.
- **UGA** is a **stop codon**, which signals the termination of protein synthesis.
- Therefore, translation stops at the UGA codon, and any subsequent codons are not translated into the protein.

### Final Protein Sequence

```
Tyrosine-Leucine-Glycine-Glutamic Acid-Tyrosine-Threonine-Arginine-Tryptophan-Leucine-Arginine
```

Or using one-letter abbreviations:

```
Y L G E Y T R W L R *
```

(The asterisk (*) denotes the stop codon.)
mRNA Sequence: 5' UAC CUU GGG GAA UAU ACA CGC UGG CUU CGA UGA AUC CGU ACG GUA CUC GCC AUC 3' Protein Sequence: Tyrosine-Leucine-Glycine-Glutamic Acid-Tyrosine-Threonine-Arginine-Tryptophan-Leucine-Arginine

3. DNA \( \rightarrow \) TAC CTT GGG GAA TAT ACA CGC TGG CTT CGA TGA ATC CGT ACG GTA CTC GCC ATC mRNA \( \rightarrow \) protein \( \rightarrow \)

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