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3.05 DNA Replication
Transcript of 3.05 DNA Replication
mRNA - the form of RNA that carries information from DNA in the nucleus to the ribosome sites of protein synthesis in the cell.
RNA polymerase - A polymerase that catalyzes the synthesis of RNA from a DNA or RNA template.
Base pairing - the formation of base pairs in DNA.
Transcription – Transcription is the first part of the protein creation process. It involves copying the DNA to mRNA and then shipping it out of the nucleus into the cytoplasm.
Translation - the process by which polypeptide chains are synthesized, the sequence of amino acids being determined by the sequence of bases in a messenger RNA, which in turn is determined by the sequence of bases in the DNA of the gene from which it was transcribed.
tRNA - a class of RNA molecules that transports amino acids to ribosomes for incorporation into a polypeptide undergoing synthesis.
rRNA - The RNA that is a permanent structural part of a ribosome.
Ribosomes - cytoplasmic particle composed of RNA and protein that is the site of protein synthesis.
Amino acids - a class of organic compounds containing the amino (NH2) and the carboxyl (COOH) groups.
Protein - Proteins are made up of amino acids bonded together. The amino acids can be combined in a variety of different arrangements, and a difference of only one amino acid in the protein chain can cause a big difference in the protein’s function (job). Proteins are used for structural support, storage, movement, signaling from one part of an organism to another, transporting other substances, increasing the rate of chemical reactions, and defense against foreign substances.