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chapter 8 voc.
genes and DNA
Term | Definition |
---|---|
Nucleotides | The small units, or monomers, that make up DNA. |
Replication | The process by which the DNA is copied during the cell cycle. |
Central Dogma | Theory that states that, in cells, information only flows from DNA to RNA in proteins. |
RNA | Ribonucleic Acid |
Translation | The process that converts, or translates, an mRNA message into a polypeptide. |
Codon | A 3-nucleotide sequence that codes for an amino acid. |
Double Helix | 2 strands of DNA wind around each other like a twisted ladder. |
Base Pairing Rules | Rule that describes how nucleotides form bonds in DNA: adenine (A) always bonds with thymine (A); guanine (G) always bonds with cytosine (C). |
DNA Polymerases | A group of enzymes. |
Transcription | The process of copying a sequence of DNA to produce a complementary strand of RNA. |
RNA Polymerases | Enzymes that bond nucleotides together in a chain to make a new RNA molecule. |
Messenger RNA (mRNA) | An intermediate message that is translated to form a protein. |
Ribosomal RNA (rRNA) | Forms part of ribosomes, a cells protein factories. |
Transfer RNA (tRNA) | Brings amino acids from the cytoplasm to a ribosome to help make the growing protein. |
Stop Codons | Codon that signals to ribosomes to stop translation. |
Start Codon | Codon that signals to ribosomes to begin translation; codes for the first amino acids in a protein. |
Anticodon | Set of 3 nucleotides in the tRNA molecule that binds to a complementary mRNA codon during translation. |