DNA; The master molecule of life

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					                                 DNA; The master molecule of life
1. DNA Stands for ________________________________________.

2. In almost all higher level organisms the DNA is found in the ___________________ in a substance
    called _____________________________.

3. DNA is called a _____________ molecule.

4. The DNA molecule is spiral shaped called a double ______________________.

5. The subunits of the DNA molecule are called:________________________.

6. The DNA Backbone is made of repeating sugar and ____________________ groups.

7. The four nitrogen bases are: Thymine , _________________ , Adenine , & ______________

8. The abbreviation for these NITROGEN BASES are :_______         ______   _______ ______

9. The type of bonds between the nitrogen bases are :____________

10. A bonds to ____________        C binds to _____________

11.__________________ are the units of heredity.

12. Genes come from __________

13. Each gene holds the coded instructions for making a different _______________________.

14. Proteins are made of long chains ___________________ __________________. Of which there are
    _______ kinds.

15. Proteins are used for:
       1. building cell parts

       2. ______________________

     3. _______________________________

     4. Regulating the speed of chemical reactions.

16. Genes : Are regions of a certain __________ molecule.

17. Genes determine the order in Amino Acids will appear in a ______________ chain.

18. The order of _____________ _____________ in a protein is what gives it the ability to do its job.

19. The four letters of the Genetic Code alphabet are: ______   ______ _____

20. The are ______ code words used by living things. Which code for _____________ Acids.
21. Each 3 letter code word corresponds to _____ amino acid.

22. All the DNA in a cell can be thought of as a ____________ contains books of instructions.

23. DNA ______________________ : When DNA copies itself before a cell divides.

24. Cells must have a way to information out of the nucleus into the cytoplasm. Cells use a special molecule
    called:_____________

25.           RNA
       1. has a ____________________ strand

       2. has ___________________ sugar instead of deoxyribose

       3. The base __________________ (U) replaces ________________ (T)

26. The RNA Alphabet is _____ ______ _______          ______

27. A Chemical signal is sent to the ____________________ to “switch on” a gene.

28. Gene Transcription: When DNA code words of a gene are copied into RNA code words (codon)
                      ____________________ __________________.

       28b. Transcription occurs in the ________________

29. After the gene is copied the M-RNA carries the protein making instructions to a ___________ in the _____

30. Ribosomes : The organelle where __________________________________________

31. A third type of RNA is need it is ______________ RNA

32. T –RNA molecules pick up __________________ Acids and “transfer” them to the M-RNA molecule.

33. Translation of M RNA in to _________________.

Transcription occurs in the __________________
In transcription DNA is converted into _________.

Translation occurs in/on the __________________.
In translation M-RNA is converted into _________ ________ , many of these
bonded together make ______________ or polypeptide.

				
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posted:11/27/2011
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