Chapter 4     Nucleic Acids  “The Flow of GeneticInformation in the Cell”
Nucleic AcidsPolymers specialized for the storage,transmission, and use of geneticinformation.DNA = deoxyribonucleic acidR...
NucleotidesConsist of apentose sugar, aphosphate group,and a nitrogen-containing base.
Nitrogenous BasesDNA bases: adenine (A),cytosine (C), guanine (G),and thymine (T)Complementary basepairing:      A–T(U)   ...
Nucleic Acid SynthesisThe “backbone” of DNAand RNA is a chain ofsugars and phosphategroups, bonded byphosphodiester linkag...
Nucleic Acid Synthesis• The two strands of  DNA run in opposite  directions  (antiparallel).
RNA vs. DNA
DNAThe two strands of a DNA molecule form a double helix. (anti-parallel)All DNA molecules have the same structure; divers...
RNASingle StrandedLess Stable then DNAWhat clue does thisgive us to its functionin comparison toDNA?
“The Correct Flow of Genetic   Information in the Cell”                         Central Dogma of Molecular BiologyThe comp...
Upcoming SlideShare
Loading in …5
×

Chapter 4

426 views
374 views

Published on

vctutorxr.weebly.com

Published in: Education
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
426
On SlideShare
0
From Embeds
0
Number of Embeds
248
Actions
Shares
0
Downloads
2
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Chapter 4

  1. 1. Chapter 4 Nucleic Acids “The Flow of GeneticInformation in the Cell”
  2. 2. Nucleic AcidsPolymers specialized for the storage,transmission, and use of geneticinformation.DNA = deoxyribonucleic acidRNA = ribonucleic acidThe monomeric units (building blocksof nucleic acids) are nucleotides.
  3. 3. NucleotidesConsist of apentose sugar, aphosphate group,and a nitrogen-containing base.
  4. 4. Nitrogenous BasesDNA bases: adenine (A),cytosine (C), guanine (G),and thymine (T)Complementary basepairing: A–T(U) C–GPurines pair withpyrimidines by hydrogenbonding.Instead of thymine, RNAuses the base uracil (U).
  5. 5. Nucleic Acid SynthesisThe “backbone” of DNAand RNA is a chain ofsugars and phosphategroups, bonded byphosphodiester linkages.
  6. 6. Nucleic Acid Synthesis• The two strands of DNA run in opposite directions (antiparallel).
  7. 7. RNA vs. DNA
  8. 8. DNAThe two strands of a DNA molecule form a double helix. (anti-parallel)All DNA molecules have the same structure; diversity lies in the sequence of base pairs.
  9. 9. RNASingle StrandedLess Stable then DNAWhat clue does thisgive us to its functionin comparison toDNA?
  10. 10. “The Correct Flow of Genetic Information in the Cell” Central Dogma of Molecular BiologyThe complete set of Not all the informationDNA in a living is needed at all times;organism is called its sequences of DNAgenome. that encode specific proteins are called genes.

×