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Transcript
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?
___________________