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17 Cards in this Set

  • Front
  • Back
which of the following molecules carries the protein blueprint out of the nucleas to a ribosome?
MRNA
whichof the following molecules carries amino acids to the ribosomes?
TRNA
site in the cell where protein synthesis occurs
ribosome
DNA molecule resembles a twisted ladder with
sides composed of sugar - phosphate chains, rungs composed of nitrogen bases, and rungs held together by hydrogen bonds
the three nucleotides on a mRNA molecule
Codons
DNA is copied onto a strand of RNA
Transcription
what molecules make up robosomes?
rRNA
Coded messages in DNA
determine amino acid sequence
Non coding nucleotides ("junk")
introns
coding nucleotides
exons
the function of RNa polymerase is
to pull the DNA strands apart
the function of DNa polymerase is
to join Dna nucleotides together to form a new DNA strand
the four nucleotide bases of RNA
Cytozine, adenine, uracil, and guanine
Give two processes mRNA goes through before leaving the nucleas
Introns are removed from RNA, and exons are spliced together, and caps are put on each end
3 differences between RNA and DNA
RNA has uracil, RNA is a single strand, and RNA has sugar ribose
how does a DNA molecule duplicated itsself?
enzymes break H bonds, enzymes reform H bonds,enzymes carry bas to sides of DNA, enzymes bond phosphate and sugars.
give the 3 parts to a nucleotide
sugars, phosphates and hydrogen bonds