RNA
Cards (2)
- RNA
- Single-stranded polynucleotide
- Ribose replaces deoxyribose as pentose (because extra oxygen at C2)
- Uracil replaces thymine
- Messenger RNA (mRNA):
- In nucleus
- From DNA template by transcription
- Length and base sequence vary
- Short life
- Transfer genetic code from DNA to ribosome
- Transfer RNA (tRNA):
- Cloverleaf shape (64 forms)
- Attaches to specific amino acid
- Transfer to ribosome
- Three bases make anticodon (determines carried amino acid)
- Ribosomal RNA (rRNA):
- Made in nucleolus
- Forms half ribosomes mass
- tRNALabel