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Academic Biology: DNA Webquest Name: _______________________________________ DNA STRUCTURE: Go to the following website: http://ghr.nlm.nih.gov/handbook/basics/dna 1. What does DNA stand for? _____________________________________________________ 2. What are the two places in a cell where I could find DNA? _____________________________________ 3. What are the four chemical bases in DNA? ______________________________________________________________________________ ______ 4. How many bases does DNA consist of? _________________________________________ 5. What three things make up a nucleotide? ______________________________________________________________________________ _______ 6. How are nucleotides arranged? ______________________________________________________________________________ ______________________________________________________________________________ ______________ 7. What forms the DNA ladder’s rungs? ___________________________________. What two things form the vertical sidepieces of the ladder? _______________________________________________________ Use the information from your notes and what you have learned to label the below image: 8. Label the image below…place the phosphate group, the five carbon sugar, and the base in the appropriate boxes. DNA structure History http://www.dnaftb.org/19/bio-3.html 1. Where did Rosalind Franklin go to college and what subject did she study? ______________________________________________________________________________ 2. In 1951, Franklin was offered a 3 year research scholarship where? _______________________________________________________________ 3. Franklin worked with Raymond Gosling and was able to get photos of DNA fibers. What did she conclude from these photos (two things)? ______________________________________________________________________________ ______________________________________________________________________________ Go to the top of the website and click on James Watsons name….. 4. What book did James Watson write and when was is published?_____________________________________________________________________ ______________________________________________________________________________ DNA Replication: http://www.dnareplication.info/stepsofdnareplication.php 1. When DNA is preparing for replication, what are the bonds that are broken to break it into two strands?__________________________________________________ 2. What enzyme is responsible for splitting the two strands? ____________________________________ 3. The splitting of the DNA starts at a place called the _____________________________________________________ 4. During the elongation process, does the same thing happen to both of the single strands that were broken apart? ________________________ 5. The “leading strand” is the one where DNA polymerase can do what?_________________________________________________________________________ ______________________________________________________________________________ 6. The more complicated strand to replicate is called the _____________________________ strand. 7. What is the last step in DNA replication called?___________________________________________. When does this process happen?_______________________________________________________________________ ______________________________________________________________________________ 8. Enzymes called___________________________________________________ remove the wrong nucleotides after DNA replication and then _______________________________________ fills the gaps that are formed. DNA and Chromosomes: http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa_pre_2011/celldivision/celldivision1.sht ml 1. Chromosomes are made of______________________________ 2. What is a gene? _________________________________________ 3. What is the difference between gametes and body cells? _____________________________________________________________________________ 4. Each person’s DNA is unique except for who?______________________________________ 5. How does each gene code for a protein?_______________________________________________________________________ ______________________________________________________________________________ 6. Look at the picture of the nucleus, chromosome, and gene and infer what the relationship is of the three things? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ RNA: http://www.news-medical.net/health/What-is-RNA.aspx What does RNA stand for?______________________________________________________________ What are the nucleotides of RNA made of?__________________________________________________________________________________ ____________________________________________________________________________________ What are the four ways that RNA differs from DNA? _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ What is the main job of RNA? _____________________________________________________________________________________ _____________________________________________________________________________________ What are the three types of RNA?________________________________________________________ Some RNAs are enzymes and act as biological catalysts….RNAs that do this are known as __________________________________________________ Transcription: http://www.nature.com/scitable/topicpage/ribosomes-transcription-and-translation-14120660 What happens during transcription?__________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ What is the most variable class of RNA?_____________________________ Translation What is the purpose of ribosomes?___________________________________________________________________________ ____________________________________________________________________________________ What two things are ribosomes made up of?_______________________________________________ Within the ribosome, the rRNA molecules do what?________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ What is translation?___________________________________________________________________________ _____________________________________________________________________________________ What does each mRNA molecule that goes to the ribosomes dictate _____________________________________________________________________________________ What is a codon?_______________________________________________________________________________ _____________________________________________________________________________________ UAA is a codon that signals to stop making a protein and so it is therefore called a __________________ What is tRNA responsible for doing?_______________________________________________________________________________ _____________________________________________________________________________________ What two different things bind to the two different ends of a tRNA molecule? ______________________________ and ___________________________________________The proteins that are made as a result of translation are how many amino acids long? ___________________