RNA and Transcription DNA RNA PROTEIN. RNA and Transcription

RNA and Transcription

PROTEIN

RNA and Transcription

RNA• Ribonucleic Acid• another type of nucleic acid found in

cells– also made of nucleotides

• takes information from the nucleus to the rest of the cell

DNA-RNA Comparison Chart

DNA RNA

strands

DNA RNA

sugar Deoxyribose

strands

DNA RNA

sugar Deoxyribose Ribose

strands

DNA RNA

basesAdenine, cytosine, guanine,

thymineAdenine, cytosine, guanine,

strands

DNA RNA

uracil

strands

DNA RNA

uracil

strands double (2)

DNA RNA

uracil

strands double (2) single (1)

DNA RNA

uracil

found nucleus

DNA RNA

uracil

found nucleus nucleus & cytoplasm

Transcription• process in which part of the nucleotide

sequence of DNA is copied into a complementary sequence in RNA

Transcription• during transcription, RNA polymerase

binds to DNA at a promoter (start) site unzipping the DNA double strand

Transcription

RNA polymerase• enzyme that produces RNA• uses one of the DNA strands as a

template from which RNA nucleotides are assembled to make mRNA– mRNA = messenger RNA

Transcription Animation

RNA Editing

• before the mRNA can leave the nucleus it has to be edited– it receives a cap and a tail– introns are cut out and exons spliced

together

RNA Editing• Intron

– sequence of DNA that is NOT involved in coding for a protein

• Exon– expressed sequence

of DNA that codes for a protein

RNA Editing

3 types of RNA

mRNA =

3 types of RNA

mRNA = messenger RNA

3 types of RNA

tRNA =

3 types of RNA

tRNA = transfer RNA

3 types of RNA

tRNA = transfer RNA

rRNA =

3 types of RNA

tRNA = transfer RNA

rRNA = ribosomal RNA

3 types of RNA

tRNA = transfer RNA

rRNA = ribosomal RNA

RNA and Transcription DNA RNA PROTEIN. RNA and Transcription

Documents

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