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