RNA copies DNA Ch. 10.2 (p.190-192)
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Transcript of RNA copies DNA Ch. 10.2 (p.190-192)
RNA copies DNACh. 10.2 (p.190-192)
• RNA = ribonucleic acid; has an extra oxygen, otherwise very similar to DNA
• Big difference: instead of using the nucleotide Thymine (T), RNA uses nucleotide Uracil (U)
• So now A—U and G—C • RNA is like a computer disk
or flash drive• Copies information on one
computer: DNA in nucleus• Takes info to another computer:
ribosomes outside the nucleus
RNA copies DNACh. 10.2 (p.190-192)
RNA comes in 3 types• 1. mRNA = messenger
RNA, the RNA acts as a messenger
• Single uncoiled chain of RNA
• Carries genetic info from DNA to outside the nucleus
RNA copies DNACh. 10.2 (p.190-192)
• Transcription = literally means rewriting ,
• Rewriting info on DNA to a molecule of mRNA
• Promoter region on DNA is where to start copying, termination region on DNA is where to stop copying
RNA copies DNACh. 10.2 (p.190-192)
RNA comes in 3 types• 2. tRNA = transfer RNA,
the RNA transfers the info from mRNA into proteins
• Single chain of about 80 nucleotides folded into hairpin shape
• Kind of looks like a t• Will discuss in 10.3
RNA copies DNACh. 10.2 (p.190-192)
RNA comes in 3 types• 3. rRNA = ribosomal
RNA, RNA that makes the ribosomes
• Ribosomes are where proteins are made
• Will discuss in 10.3
RNA copies DNACh. 10.2 (p.190-192)