Where is drived thymine

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-Nucleic acid: are composed of nucleotides, very large and complex organic molecules that contain the genetic code for that organism.

Nitrogen bases: adenine, thymine, cytosine, guanine & uracil

-DNA replication: means making more DNA

^it occurs in the nucleus(eukaryote cells have nucleus but prokaryotes don't) ^typically happens during interphase   

^it doesn't happen during mitosis(cell division)

^cells replicates its dna before division processes like mitosis and meiosis

^enzymes have the ability to speed up reactions and build up or break down items that they act on

-Types of enzymes:

^helicase-breakdown the 2 strands of DNA

^DNA primase-tells polymerase where to go

^DNA polymerase- replicates dna molecules to build a new strand of dna (20 bases p/s)

^ligase-helps glue dna fragments together

-DNA sequence:

^helicase unwinds dna

^ssb proteins bind to dna strand

^primase creates primer

^dna polymerase begins to build

*dna strands complement each other (not identical)

-Leading strand: 5’ to 3’ direction

-Lagging strand: 3’ to 5’ direction

-Okazaki fragments: short sequence of DNA nucleotides which is linked together by DNA ligase to create the lagging strand.  

-Replication bubble: an unwound and open region of DNA helix where DNA replication occurs

-Transcription: process in which RNA is synthesized by copying one segments of dna

^occurs in the nucleus

-Types of RNA=produce proteins

^ribosomal RNA (rRNA)

^messenger RNA (mRNA)
^transfer RNA (tRNA)

1.Initiation=when the promoter region is found by the RNA polymerase

2.Elongation=the RNA polymerase  bring the complementary bases

3.Termination=RNA polymerase finds the terminator sequence

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