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Worksheet # 25 (up to lecture on 11/20)
1. ~ is the genetic material.located in the nucleus of a cell and ~ are the
working molecules of the cell and t"\ \,0~6~ synthesize them.
2. Give a few functions that proteins have in a cell.
lA~~ J P\~~ I ~ll..f~
3. T /ij)rhe 2 strands of the double helix are sister chromatids. If false what is correct?
~ v (> 't--"-"'- b NA
4. Hydrogen bonds individually are ~ but the hydrogen bonds in a DNA
molecule collectively are ~t'::1 .(HINT: strength)
5. The complimentary~ ofDNA are held together by H-bonds. ()
6. T~NA is a very stable molecule that can last up to millions of years. ( tSl:5D S aT- 0-"='
7. The ~ of DNA is made up of phosphate groups.
8. What 2 things give D~A stability? t- ~, ~
cltJI.I "'0 ~ ~ )() o.""d. ~ v.J b ~ ...) ,
9. What phase does replication of DNA occur in? I f'\ S-(J~ 0.1;: \ f'\+U p~
10. What are the 3 molecules involve~ in replicating DNA and explain what each one ~ ~ / -
does. DNA ~ ~ yh ~ v t\JA S~ () N It fl ~ ~ ~
~... ~s~,~~~ ~I 'Dt.JA-l.,s~, '(.( 0 rV\As~
11. The newly replicated strands of DNA are the ~ ~ .
12. What happens if there is a mistake ill the base pairing ofDNA?
~r -bu\\C 13. I~controls~pathways.
14 Enzymes are responsible for a specific set of reactions.
15. LUC~ ~~It would be an ~e of what ? ( discussed in clas~)
16. What did Garrod figure~~ studying enzxrnes? ~p. t,!\:1;:L(. ~ ~ S'p. {~tJJ .
16~ & ~ came up with the one gene one protein hypothesis by
studying bread molds.
17. DNA is ~t.t~ in the language of ~ and proteins are assembled by 20
~M\f\.D ~~
18. So far what are the 2 problem~J?foposed by this differw~e in language of the DNA
andproteins? ~ &~~ ~lo~"6Y""\
19. Which molecule is responsible for unraveling the DNA? ~~
20. Which molecule reads the DNA and places complimentary bases to the strand?~ P'=>"t~
21. Which molecule is the "repair crew" ofDNA if there is a mistake? pN~ t,~