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lecture 2,3 chapter
| Question | Answer |
|---|---|
| transcription | the enzyme-catalyzed assembly of an RNA molecule complementary to a strand of DNA |
| ribosome | moleclar machines that arry out protein synthesis; the most complicated aggregation of proteins in a cell, also contain three different RRNA molecules |
| TATA box | resembles the- 10sequence from bacteria. contained in a " core promoter" |
| Gene expression | the two steps of the central dogma, taken together, are a concise summary of the events involved in the expression of an active gene |
| what is central dogma | information passes from the genes ( DNA) to an RNA copy of the gene, and the RNA copy directs the sequential assembly of a chain of aminoacids. |
| what is promoter | a specific nucleotide sequence to which RNA polymerase attaches to initiate transcription of MRNA from a gene |
| translation | the assemply of a protein on the ribosomes, using MRNA to specify the order of amino acids |
| triplet code | set of three nucleotides |
| codon | basic units of the genetic gode; sequences of three adjacent nucleotides in DNA or MRNA that codes for one amino acid |
| tRNA | a class of small RNA with two funcitonal sites:-an activating enzyme: adds a specific amino acid-carried the nucleotide triplet(anticodon) specific for that amino acid |
| exons | segment of DNA that are both transcribed into RNA and translated into protein. |
| introns | portion of MRNA as transcribed from euke DNA that is removed by enzymes before the mature MRNA is translated into protein |
Created by:
hamynguyen
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