RNA: STRUCTURE AND FUNCTION
39 DNA vs. RNA
40 Major types of RNA
• Ribosomal RNAs: they are part of ribosomes, which are
small granular organelles where protein synthesis takes
place.
– Each ribosome is a complex consisting of about 60%
ribosomal RNA (rRNA) and 40% protein
• Messenger RNAs (mRNA) carry information transcribed
from DNA. They are formed in the cell nucleus and
transported out to the ribosomes.
• Transfer RNAs (tRNA) are smaller RNAs that deliver
amino acids one by one to protein chains growing at
ribosomes.
41
RNA Structure and Function
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