Here are the answers to each question based on the content you provided:
1. **Which of the following demonstrates the central dogma of molecular biology?**
- **Answer:** DNA and RNA hold the code to create proteins that are the key to gene expression.
2. **After the amino acid chain leaves the ribosome, which organelle then folds, modifies, and transports the protein?**
- **Answer:** Endoplasmic Reticulum
3. **Which sequence shows a substitution mutation?**
- **Answer:** C G T A C T G C A A T
G C A T G A C G T T A
*(This entry is assumed to show a change in the base from the original sequence)*
4. **Which of the following best describes how a liver cell and skin cell have the exact same DNA sequence and yet look different and perform different functions?**
- **Answer:** The proteins are expressed differently in each cell.
5. **What step did Stella miss in her explanation of protein synthesis?**
- **Answer:** mRNA is translated into amino acids.
Let me know if you need any further assistance!