Worksheet illustrating the process of protein synthesis, showing DNA, mRNA, tRNA, and amino acid sequences, with handwritten answers.

Problem Analysis:

The worksheet focuses on the process of protein synthesis, which involves several steps: transcription, translation, and the use of codons and anti-codons. The tasks require filling in complementary DNA strands, transcribing DNA to mRNA, translating mRNA codons into amino acids, and understanding the roles of tRNA and codons/anti-codons.

Solution Explanation:

#### Step 1: Fill in the complementary DNA strand using DNA base pairing rules.
- DNA Base Pairing Rules:
- A pairs with T
- T pairs with A
- C pairs with G
- G pairs with C

Given DNA strand (top):
`ATGGTACGTTAACCCT`

Complementary DNA strand (bottom):
`TACCAATGCATTGGGA`

#### Step 2: Fill in the correct mRNA bases by transcribing the bottom DNA code.
- Transcription Rules:
- DNA's T is replaced with U in mRNA.
- Other bases remain the same.

Bottom DNA strand:
`TACCAATGCATTGGGA`

mRNA strand:
`UACCUAUUGCUAUGGGU`

#### Step 3: Translate the mRNA codons and find the correct amino acid using the Codon Table.
- Codon Table: Each codon (a sequence of three nucleotides) corresponds to a specific amino acid.
- mRNA codons: Break the mRNA strand into groups of three nucleotides.

mRNA strand:
`UAC CUU AUU GCU AUG GGU`

- Translation:
- `UAC`: Tyrosine (Y)
- `CUU`: Leucine (L)
- `AUU`: Isoleucine (I)
- `GCU`: Alanine (A)
- `AUG`: Methionine (M)
- `GGU`: Glycine (G)

Amino Acid Sequence:
Tyrosine, Leucine, Isoleucine, Alanine, Methionine, Glycine

#### Step 4: Write in the amino acid and the correct anti-codon the tRNA molecule.
- tRNA Anti-Codon: The anti-codon on tRNA is the reverse complement of the mRNA codon.
- Anti-Codon Rules:
- A pairs with U
- U pairs with A
- C pairs with G
- G pairs with C

mRNA codons:
`UAC CUU AUU GCU AUG GGU`

tRNA Anti-Codons:
- `UAC` → `AUG`
- `CUU` → `AGA`
- `AUU` → `UAA`
- `GCU` → `CGA`
- `AUG` → `UAC`
- `GGU` → `CCA`

tRNA Anti-Codon Sequence:
`AUG AGA UAA CGA UAC CCA`

#### Step 5: Answer the questions about protein synthesis.
1. mRNA is synthesized in translation or transcription?
- Answer: Transcription

2. mRNA has codons or anti-codons?
- Answer: Codons

Final Answers:

1. Complementary DNA strand:
`TACCAATGCATTGGGA`

2. mRNA strand:
`UACCUAUUGCUAUGGGU`

3. Amino Acid Sequence:
Tyrosine, Leucine, Isoleucine, Alanine, Methionine, Glycine

4. tRNA Anti-Codon Sequence:
`AUG AGA UAA CGA UAC CCA`

5. Questions:
- mRNA is synthesized in transcription.
- mRNA has codons.

Final Boxed Answers:

\[
\boxed{
\text{1. TACCAATGCATTGGGA} \\
\text{2. UACCUAUUGCUAUGGGU} \\
\text{3. Tyrosine, Leucine, Isoleucine, Alanine, Methionine, Glycine} \\
\text{4. AUG AGA UAA CGA UAC CCA} \\
\text{5. Transcription, Codons}
}
\]