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RNA copies DNA Ch. 10.2 (p.190-192)

RNA copies DNA Ch. 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

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RNA copies DNA Ch. 10.2 (p.190-192)

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  1. 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

  2. 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

  3. 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

  4. 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

  5. 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

  6. RNA copies DNACh. 10.2 (p.190-192)

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