click below
click below
Normal Size Small Size show me how
The central dogma
lecture 7
| Question | Answer |
|---|---|
| what is the central dogma of molecular biology | DNA codes for RNA which codes for protein |
| enzyme needed for transcription to make mRNA | RNA polymerase |
| transcripton occurs in | the nucleus |
| translation occurs in | the ribosome |
| the four RNA bases are | adenine, uracil, granine and cytosine |
| the four bases in DNA are | Adenine , thymine , granine and cytosine |
| name the sugar found in DNA | Deoxyribose |
| name of sugar found in DNA | Ribose |
| enzyme used in DNA replication | DNA polymerase |
| a nucleotide consists of | a base a sugar and a phosphate |
| DNA winds around a protein called | a histone |
| many histones clumped together are called | a nucleosome |
| when DNA gets shorter and thicker is is described as | supercoiled which means it has wound around itself |
| During the G1 phase of interphase | duplication of organelles occurs |
| During the S phase of interphase | duplication of chromosomes occurs |
| During the G2 phase of interphase | chromosomes are checked for duplication errors |
| the M phase of the cell cycle is divided into | prophase, metaphase, anaphase and telophase |
| immediately after the M phase this occurs | Cytokinesis |
| during meiosis | homologous chromosomes separate first and then sister chromatids separate |
| Variation is caused by | crossing over of genetic material during prophase 1 of meiosis. |
| the point where homologous cross over is called a | synapsis |