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MOLECULAR GENETICS QUESTION LOOP 147033917 Semi-conservative [START] What are building blocks of nucleic acids? Nucleotides What is the name of the sugar in DNA? Deoxyribose What type of reaction joins nucleotides together? Condensation What are the 4 letters for the DNA bases? A, T, C, G What base is on RNA and not DNA Uracil Which enzyme transcribes DNA? RNA Polymerase What does RNA polymerase make? MRNA How does mRNA leave the nucleus? Through a nuclear pore Where does translation occur? At a ribosome Which molecule brings specific amino acids to ribosomes? tRNA What is the name for 3 bases on an mRNA strand? Codon What does the codon bind to? Anticodon How many different amino acids are there? 1 20 How many different codons are there? 64 What AUG is the codon for? The start of a polypeptide What bond joins the amino acids? Peptide What is a chain of amino acids called? Polypeptide What is a length of DNA that codes for a polypeptide? A gene What is a collection of ribosomes called? A polysome What organelle do ribosomes frequently attach to? Rough endoplasmic reticulum What word is used to describe the fact that several codon codes are used for the same amino acid? Degenerate code What are the 2 purine bases? A&G What bonds hold the polynuclear strands together in DNA? Hydrogen bonds What model describes the process of DNA replication? 147033917 2