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14 Cards in this Set

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mRNA
template for protein synthesis - translation
tRNA
carries activated amino acids to ribosome for peptide bond formation.

Sequence of bonds dictated by mRNA
rRNA
ribosomal - major component of ribosomes; plays catalytic and strucutral role in protein synthesis
transcription

catalyzed by?
synthesis of RNA from DNA template.

Catalyzed by RNA polymerase
Requirements of transcription:
-template
-activated precursors - ATP,UTP,GTP,CTP
-Divalent metal ion Mg2+ or Mn2+
direction of synthesis in transcription
5'->3'

same as replication
which end of the growing strand are NTPs added in transcription?
the 3' hydroxyl end
are primers required for transcription?
no
how are nucleotides selected for the sequence in RNA transcription?
by basepairing with the template.
what is RNA complementary to
template DNA
not the coding strand.
polarity of DNA coding strand:
5-3
polarity of template strand
3-5 prime
polarity of RNA strand
5-3

same as coding strand,
both complementary to template
promoter sites
specifically bind RNA polymerase and initiate transcription