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RNA and Transcription
DNA
RNA
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
sugar
bases
strands
found
DNA RNA
sugar Deoxyribose
bases
strands
found
DNA-RNA Comparison Chart
DNA RNA
sugar Deoxyribose Ribose
bases
strands
found
DNA-RNA Comparison Chart
DNA RNA
sugar Deoxyribose Ribose
basesAdenine, cytosine, guanine,
thymineAdenine, cytosine, guanine,
strands
found
DNA-RNA Comparison Chart
DNA RNA
sugar Deoxyribose Ribose
basesAdenine, cytosine, guanine,
thymineAdenine, cytosine, guanine,
uracil
strands
found
DNA-RNA Comparison Chart
DNA RNA
sugar Deoxyribose Ribose
basesAdenine, cytosine, guanine,
thymineAdenine, cytosine, guanine,
uracil
strands double (2)
found
DNA-RNA Comparison Chart
DNA RNA
sugar Deoxyribose Ribose
basesAdenine, cytosine, guanine,
thymineAdenine, cytosine, guanine,
uracil
strands double (2) single (1)
found
DNA-RNA Comparison Chart
DNA RNA
sugar Deoxyribose Ribose
basesAdenine, cytosine, guanine,
thymineAdenine, cytosine, guanine,
uracil
strands double (2) single (1)
found nucleus
DNA-RNA Comparison Chart
DNA RNA
sugar Deoxyribose Ribose
basesAdenine, cytosine, guanine,
thymineAdenine, cytosine, guanine,
uracil
strands double (2) single (1)
found nucleus nucleus & cytoplasm
DNA-RNA Comparison Chart
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
3 types of RNA
3 types of RNA
mRNA =
3 types of RNA
mRNA = messenger RNA
3 types of RNA
mRNA = messenger RNA
tRNA =
3 types of RNA
mRNA = messenger RNA
tRNA = transfer RNA
3 types of RNA
mRNA = messenger RNA
tRNA = transfer RNA
rRNA =
3 types of RNA
mRNA = messenger RNA
tRNA = transfer RNA
rRNA = ribosomal RNA
3 types of RNA
mRNA = messenger RNA
tRNA = transfer RNA
rRNA = ribosomal RNA