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ch.3 bio
terms
| Question | Answer |
|---|---|
| nucleus | is a spherical or oral-shaped sturcture that usually is the most promient feature of a cell |
| chromosomes | contain are genes; the source of information for building and running cells |
| nuclear envelope | separtes the nucleus from the cytoplasm;NE- is double-walled |
| nucleolus | is a site within the nucleus that oroduces new ribosomes |
| DNA | double straneded |
| RNA | single strandeded |
| humans have.... | 46 chromosomes |
| messenger RNA (mRNA) | RNA conatins sequence meant to encode proteins |
| translation | the mRNA sequence is used to make new proteins in a process |
| transcription | is the process where DNA sequence is copied (or transcribed) into RNA sequence |
| RNA polymerase | stick stuff together |
| rRNA | joins with ribosomal proteins to make ribosomes |
| tRNA | binds to an amino acids and holds it in place on a ribosome unitl it is incorapted into a protein during translation |
| mRNA | traveling copy of a gene, enters the cytoplasm to dircet the synthesis of a specfic protein |
| tRNA | "taxi" |
| interphase | is not a stage in mitosis |
| cytokinesis | takes place at the end |
| G0 phase | never divide; "mermory cell" |
| G0 phase | 8-10 hours |
| G2 phase | 4-6 hours |
| cell division | the process by which cells reproduce themselevs |
| 2 types of cell division | somotic cell division, reproductive cell division |
| meiosis | start with one cell end up with four new cells |
| DNA molecules | are copied during the S phase |
| the sturcutre of the double helix... | allows both copies of the new DNA to have the same sequence |
| meiosis | the reproductive cell division that occurs in the gonads (ovaries and testes) produces gametes in which the number of chrosomes is reduced by half |
| cytokinesis | cells finsih dividing, (after mitosis) |
| cells grow, and also duplicate their DNA during | interphase |
| RNA polymerase | creates the RNA molecules |
| "long arm" | Q |
| "short arm" | P |
| long and short arm are in... | the chromosomes |
| each chromosme contains DNA combined with histone proteins to form | chromatin |
| centromere | after DNA replication, sister chromatids are connected |
| stromal cells | connective tissue cells of an organ found in the loose connective tisue |
| system lupus erythematosus | a chronic, inflammatory autimmune disorder |
| system lupus erythematosus | affect the skin, joints, kidneys and other organs |
| proteosomes | a subcellular organele foud throughout the cytosol, nucleus endoplasmic reticulum (ER) and lyosomes of eukaryotic cells |
Created by:
Courtneey
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