???????????? (Nucleic acid) - PowerPoint PPT Presentation

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???????????? (Nucleic acid)

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Title: ???????????? (Nucleic acid)


1
???????????? (Nucleic acid)
2
???????????? (Nucleic acid)
  • ??????????????????????????????????????????????????
    ???????????

??????????? 2 ????
  • ???????????????????????(Deoxyribonucleic acid)
    DNA
  • ???????????????? (Ribonucleic acid) RNA

3
DNA
  • ?????????????????????
  • ?????????????????????????

RNA
  • ??????????????????????????
  • ?????????????????????

4
(No Transcript)
5
DNA RNA protein
6
????????????????????????
?????? ???????????? (nucleic acid)
?????????????????????????????? ????????????
(nucleotide)
????? nucleotide ?????????? 3 ???? ???
  • 1.?????????????????????????????????? (
    nitrogenous base)
  • 2.?????????????????? 5 ????? (pentose sugar)
  • ??????????? (RNA)
  • ?????????????????? (DNA)
  • 3.?????????? (phosphate group)

??????????????????????????????????????????????????
???????? ? ????????????
7
1. ?????????????????????????????????? (
nitrogenous base)
  • ???????????? (Pyrimidines Base) ?? 3 ???? ???
  • ??????? (Cytosine C)
  • ????? (Thymine T ) (in DNA)
  • ??????? (Uracil U ) (in RNA)
  • ????????? (Purines Base) ?? 2 ???? ???
  • ??????? (Adenine A)
  • ?????? (Guanine G)

8
Nitrogenous base
9
?? DNA ??? RNA ????????? 4 ????
  • DNA ????? A, G, C, T
  • RNA ????? A, G, C, U

10
2. ?????????????????? 5 ????? (pentose sugar)
?? RNA ??? ribose ?? DNA ??? deoxyribose
???????????
??????????????????
11
3. ?????????? (phosphate group)
12
pentose nitrogenous base phosphate group
nucleotide
13
  • Nucleotide ????????????????????????? ????????????
    polynucleotide ????????? phosphate ??? pentose
    ?????????????????? ??? nitrogenous base
    ?????????????????????? nucleic acid
  • Bond ????????????????????? nucleotide 2 ???????
    ???????? Phosphodiester linkage

14
????????????????????????????
  • ??????????????????????????????.............???????
    ???????
  • 1...............................
  • 2...............................
  • 3...............................
  • ????????? ??????..................................
    ..
  • ???????????? ??????...............................
    ....
  • ???????????? DNA ???..............................
    .
  • ???????????? RNA ???..............................
    .
  • ??????????? ????
  • ?????????????????? ????.........................

15
DNA (Deoxyribonucleic acid)
  • ????????????? polynucleotide 2 ???
    ??????????????? ????????????????????????
    ???????? double helix

16
The structure of part of a DNA double helix
  • ????? http//en.wikipedia.org/wiki/ImageDNA
    _Overview.png

17
????????????????? DNA
  • A ?????? T
  • ????????????????
  • 2 ?????
  • G ?????? C
  • ????????????????
  • 3 ?????

18
(No Transcript)
19
?????????????
20
(No Transcript)
21
RNA (Ribonucleic acid)
RNA ??????????? 3 ???? ???
  • 1. Ribosomal RNA (rRNA)
  • 2. Messenger RNA (mRNA)
  • 3. Transfer RNA (tRNA)

22
1. Ribosomal RNA (rRNA)
  • - 80-90 ??? RNA??????????????? ??????? rRNA
  • -???????? DNA ???????????????????
  • ??????????????????????????????????????????????????
    ???????????????? ???????????????

23
2. Messenger RNA (mRNA)
- 2-4 ??? RNA ??????????????? -  ???? RNA
????????????????????????? ( transcription )
??????????????????? DNA???????????????????????????
????????????????????????????????
24
3. Transfer RNA (tRNA)
  • RNA ?????????????? DNA ????????????
    ?????????????????????????????? ????????????
    ????????????????????????????????????? ????????????

25
(No Transcript)
26
????????????????????????????? DNA ??? RNA
DNA RNA
?????????? ????????? ?????????
?????? Deoxyribose sugar Ribose sugar
??? Purine (A, G) pyrimidine (T, C) Purine (A, G) pyrimidine (U, C)
polynucleotide Double stand (??????) Single stand (?????????)
27
(No Transcript)
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