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How Genes Function Quiz 6D
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Four main points of how genes function Nucleotides (symbols in the language) are arranged into codons (letters) Codons (letters in the language are arranged into genes (words) Genes (words in the language) are the instructions for making proteins During reproduction a complete copy is made of all genes and is given to each new organism
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An organism's ability to manufacture proteins enables it to carry on its life processes. Since what a cell can or cannot do depends upon enzymes, cells are controlled by enzymes, which are proteins.
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protein a substance made of long chains of amino acids
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enzymes the organic catalysts that control chemical reactions in living things
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DNA Rosalind Franklin Crick
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DNA is Coded Messages DNA - Deoxyribonucleic acid 1953 James d. Watson and Francis H.C. Crick - model for the structure of DNA
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DNA looks like a twisted ladder
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DNA is made up of nucleotides
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Nucleotide: the basic structured unit of DNA and RNA Sugar Phosphate base
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nucleotide - the basic structured unit of DNA and RNA Sugar (deoxyribose) & Phosphate form the sides of the ladder Bases form the rungs
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DNA nucleotide bases adenine thymine guanine cytosine
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how bases pair up A – T C - G
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genes are sections of DNA
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replication - the process of forming 2 DNA molecules from 1 original DNA molecule
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RNA- ribonucleic acid messenger RNA (m-RNA): the RNA molecule that transports a coded message from the nucleus to the cytoplasm transfer RNA (t-RNA): the RNA molecule that transfers amino acids to the messenger RNA Ribosomal RNA (r-RNA) makes up ribosomes (decoder)
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How does RNA differ from DNA? RNA has a single chain of nucleotides base thymine is replaced by Uracil
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How does RNA differ from DNA?
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RNA nucleotide bases adenine uracil guanine cytosine
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How is RNA made? transcription- the process of forming messenger RNA from DNA
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Transcription
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Protein Synthesis takes place in the ribosome protein synthesis- the manufacturing of protein inside a cell messenger RNA (m-RNA): the RNA molecule that transports a coded message from the nucleus to the cytoplasm. transfer RNA (t-RNA): the RNA molecule that transfers amino acids to the messenger RNA
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