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Lecture 4

BIOL 112 Lecture Notes - Lecture 4: Dna Replication, Double Bond, Ribose


Department
Biology
Course Code
BIOL 112
Professor
Frieder Schoeck
Lecture
4

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HBM
Main Function of RNA: intermediate between DNA and protein (mRNA)
Some may have complex 3D structure
o Stem-loop structures
May also be catalytic (riboenzymes)
Function of DNA and proteins may have been carried out
by RNAs when life evolved
o Unique folding pattern, which gives different
properties for the RNA
1. Ribose, bases, and phosphate come together to
form RNA
2. Some RNA molecules gain the ability to replicate
3. RNA molecules begin to make catalytic proteins
4. Catalytic proteins increase the efficiency of RNA
replication and protein synthesis. They also aid the
formation of double stranded RNA, which then evolves
into double-stranded DNA
5. DNA becomes the primary molecule for
information storage. DNA uses RNA to make proteins,
which in turn help with DNA replication and transcription.
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