DNA Replication Original DNA Replication Starts After Replication

DNA Replication Original DNA Replication Starts After Replication Use the diagram above to answer the following questions: 1. How many strands of DNA are there in a DNA molecule? 2. What are the strands of DNA made of? 3. What does it mean for something to be replicated? 4. What must happen to the strands of DNA prior to the start of replication? 5. When DNA is replicated, what are the base pairing rules? 6. What is the result of DNA replication?

Protein Synthesis Diagrams A ge n a spe e codes fo cific prot r ein!

Transcription and m. RNA Processing Use the diagrams to fill in the blanks: 1. A segment of DNA that codes for a __________ is called a ______. 2. In order for this segment of DNA to become a protein, it must undergo two steps. The first step is called _______ and occurs in the nucleus. 3. During transcription, a gene is copied to a molecule of ______. 4. Before the m. RNA can leave the nucleus, it must first be processed. During this processing, ______ are cut out while _______ remain in the m. RNA molecule. 5. Once transcription and m. RNA processing are complete, the m. RNA molecule leaves the nucleus and will migrate to a ________ where the next step will take place.

Translation Use the diagrams to fill in the blanks: 1. 2. 3. 4. 5. The process above is the second and last step to protein synthesis. It’s called ______. Translation takes place at the _______. A set of three bases in a row, or triplets, on m. RNA are called ______. Each codon has a corresponding ______ found on a t. RNA molecule. The table at the bottom right of this page is called a “code breaker” or “genetic code dictionary”. The three letter abbreviations stand for ______ that each _____ in m. RNA codes for. 6. Since there are ______ amino acids and _______ codons, it is possible for more than one codon to specify a particular amino acid. 7. A “Stop” codon tells the ribosome that there are _______ amino acids to add to the protein. 8. The m. RNA codon UUC codes for ______. 9. The m. RNA codon CAG codes for ______. 10. The DNA codon TAC codes for ______. 11. The DNA codon GGG codes for ______. 12. The DNA codon ACT codes for ______. 13. It would take ______ codons to code for 4 amino acids. 14. It would take ______ bases to code for 4 amino acids.