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DNA Nucleotide Chargaff’s Rule Double-Helix Antiparallel Strands Bacteriophage Telomeres Replication DNA Polymerase Helicase RNA mRNA rRNA tRNA RNA Polymerase A double-stranded nucleic acid that contains deoxyribose. Repeating unit of DNA Explains how bases pair in a DNA strand ( A-T and G-C) Term we use to describe the shape of a strand of DNA Term we use to describe how the two strands in DNA run in opposite directions. A kind of virus that infects bacterial cells. Repetitive DNA at the end of a eukaryotic chromosome. The process in which DNA makes a copy of itself The principal enzyme involved in DNA replication. The enzyme that unwinds or unzips a double-stranded DNA molecule. A single-stranded nucleic acid that contains the sugar ribose. A type of RNA that carries copies of instructions for the assembly of amino acids into proteins from DNA. A type of RNA that combines with proteins to form ribosomes. A type of RNA that carries each amino acid to a ribosome during protein synthesis. The principal enzyme involved in transcription. Introns Exon Transcription Polypeptide Genetic Code Codon Anticodon Mutation Point Mutation Insertion Mutation Deletion Mutation Substitution Mutation “Extra” information which does not code for a gene; it is cut out before the final mRNA strand is made. These parts are spliced together to create the final mRNA strand. The synthesis of an RNA molecule from a DNA template. A long chain of amino acids that makes proteins. A collection of codons of mRNA, each of which directs the incorporation of a particular amino acid into a protein during protein synthesis. A group of three nucleotide bases in mRNA that specify a particular amino acid to be incorporated into a protein. A group of three bases on a tRNA molecule that are complementary to the three bases of a codon of mRNA. A change in the genetic material of a cell. A gene mutation in which a single base pair in DNA has been changed. An extra nucleotide is inserted into the DNA strand. A nucleotide is deleted from the DNA strand. One nucleotide is replaced with another nucleotide which has a different nitrogenous base. Ribose Process of using mRNA to make polypeptide chains. An organelle which creates peptide bonds between amino acids and also facilitates the separation between tRNA and amino acids. Protein that blocks DNA polymerase resulting in the termination of DNA replication. The 5-carbon sugar found in RNA Deoxyribose The 5-carbon sugar found in DNA Transformation A process in which one strain of bacteria is changed by a gene or genes from another strain of bacteria. Translation Ribosome Ter Protein