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Biology H-Mr.Willets
DNA / Protein Synthesis
Pg 185-187
1) What are the three parts to a DNA nucleotide?___________________________________________
2) What are the four kinds of nitrogen bases? ____________________________________________
3) Which two bases are pyrimidines? _________________________ What is the structure of a pyrimidine like?___________________________________ The other two bases are a type of molecule called ____________________What is this structure like? ________________________________
4) The smaller molecules that make DNA are arranged in a shape called a __________________ Describe this shape. ______________________________Who won the Nobel Prize for discovering the structure of DNA? __________________________________________________________
5) What are the complementary base pairs (use letters from now on) ____________ and ____________
6) Why is it necessary that DNA be able to make exact copies of itself? ___________________________
____________________________________________________________________________
Page 188-189
7) What is the name of the process by which DNA copies itself? ____________________________
8) What enzyme separates the two sides of the DNA molecule? ________________________
9) What enzyme controls replacing the missing side of the DNA? _______________________
10) How often are errors made in this process? ______________________ Proofreading and repairing keeps this rate down to one error per ________________ nucleotides.
Page 190-191
11) RNA is similar to DNA except is uses the sugar ________________ and it uses the nitrogen base _________________ instead of _______________ (use names here)
12) What are the three types of RNA- ______________________ , _______________________ ,
_____________________________
13) mRNA is a __________________________ chain. It carries ______________________ from the DNA
14) tRNA is a single coil that folds into a ____________________ shape. It can bind to specific
_________________________
Page 191-192
15) What is the name of the process that copies genetic information from DNA to RNA? ________________
What enzyme controls this process? ______________________________
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