DNA Review. Mr. Hefti – Pulaski Biology. Protein Synthesis. DNA.
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Mr. Hefti – Pulaski Biology
Across2. the two sides of DNA held together by weak ____ bonds5. always pairs with cytosine6. where protein is assembled from the message on the RNA7. the shape of DNA, double ____9. process of copying DNA13. composed of a sugar, a base, and a phosphate14. sections of DNA that code for a trait15. replaces thymine in RNA
We can think about the DNA sequence of a gene as a sentence made up entirely of three-letter words. In the sequence, each three-letter word is a codon, specifying a single amino acid in a protein. Have a look at this sentence:
If you were to split this sentence into individual three-letter words, you would probably read it like this:
The sun was hot but the old man did not get his hat.
This sentence represents a gene. Each letter corresponds to a nucleotide base, and each word represents a codon. What if you shifted the three-letter "reading frame?" You would end up with
T hesunw ash otbuttheoldm and idnotg eth ish at.
As you can see, it is no longer an understandable sentence. In the same way, only one three-letter reading frame within a gene codes for the correct protein.
AUG | GUA UCU AAA | GUU CCU ACU GAA AAG | CUU CUC CUC CCC | GUU GCG GCU | CAU CAC| GUA UUU UAU | GUA AUU CUU CUG CCC ACA | GUU GAC GAC GCA | UUC UCG GGU | AGA UAU UGU | UAA
☺What is this type of diagram called?
☺What are the structures called?
☺What are the markings called?
☺What are they made out of?
☺Is this person a boy or a girl?
☺Do you see any mutations?
☺If so, circle it.
☺What kind of mutation is it?
☺What it the name of this lab technique?
☺ What causes the DNA to separate?
☺ What moves faster: small fragments or large fragments of DNA?