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Biology Vocab

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Term
Definition
Nucleotide   small units, monomers, that make up DNA  
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Double helix   two strands of DNA that shows the structure of DNA  
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Base pairing rules   Thymine always pairs with adenine and cytosine always pairs with guanine  
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Replication   The process by which DNA is copied during the cell cycle  
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DNA polymerase   a group of enzymes that bond the new nucleotides together  
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Central dogma   information flows one direction, from DNA to RNA to proteins  
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RNA   ribonucleic acid, a chain of nucleotides  
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Transcription   the process of copying a sequence of DNA to produce complementary strand of RNA  
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RNA polymerase   enzymes that bond nucleotides together in a chain to make a new RNA molecule  
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Messenger RNA   an intermediate message that is translated to form a protein  
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Ribosomal RNA   forms part of ribosomes, a cell’s protein factories  
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Transfer RNA   brings amino acids from the cytoplasm to a ribosome to help make the growing protein.  
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Translation   the process that converts, or translates, an mRNA message into a polypeptide  
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Codon   a three-nucleotide sequence that codes for an amino acid  
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Stop codons   signal the end of the amino acid chain  
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Start codon   signals the start of translation and the amino acid methionine  
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Anticodon   a set of three nucleotides that is complementary to an mRNA codon  
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