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17 Cards in this Set
- Front
- Back
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WHAT IS A CHROMOSOME? |
genetic information is bundled into packages of DNA know as chromosome. Shape - duplicated chromosome with super coil cromatin |
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WHAT IS THE ROLE OF CHROMOSOMES IN CELL DIVISION. |
make it possible to separate DNA precisely in cell division. |
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CHROMATIN |
complex of chromosome and protein
coil within a coil |
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PROKARYOTIC CHROMOSOMES |
prokaryotic cells lack nuclei. |
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EUKARYOTIC CHROMOSOMES |
have more DNA then pro. contain multiple chromosomes. DNA tightly coils around the histories and together DNA and historie molecules form beadlike structure (nucleosomes) |
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WHAT ARE THE MAIN EVENTS OF THE CELL CYCLE? |
a cell grows, prepares for division and divides to form two daughter cells. |
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WHAT IS THE CYCLE?
1 |
1.) G1- GAP1- GROWTH 2.) S-SYNTHESIS-> what happened here? Replication of DNA 3.) G2- GAP2 4.) M- MITOSIS #1-3 IS INTER PHASE #4 IS CELL DIVISION 1 |
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WHAT IS THE CELL CYCLE AS WELL?
2 |
G0-NERVE-BRAIN MUSCLE I- INTERPHASE P - PROPHASE M - METAPHASE- meet in middle A - ANAPHASE- APART T - TELOPHASE- THE END CYTOKINESIS- COMPLETE SEPARATION 2 |
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CELL CYCLE
3 |
each daughter cell then moves into a new cell cycle of activity growth and division.
3 |
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PROKARYOTIC CELL CYCLE |
regular pattern of growth replication&division. begin to replicate once grow to certain size. form of asexual repro. known as binary fission. once 2 DNA molecules attach to cell membrane fibers stretch to both sides fibers pinch inwards. Binary fission results in product of two genetically identical cells. |
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G PHASE: CELL GROWTH |
in G1 Phase, cells increase in size and synthesize new proteins and organelles. |
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S PHASE: DNA REPLICATION |
in the S Phase (or synthesis) phase, new DNA is synthesized when the chromosomes are replicated. |
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G2 PHASE: PREPARING FOR CELL DIVISION |
many of the organelles and molecules required for cell division are produced, |
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M PHASE: CELL DIVISION |
produce two daughter cells (gets its name from Mitosis) |
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MITOSIS |
1st stage division of cell nucleus
Divided into 4 phases *prophase *metaphase *anaphase *telophase |
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Cytokinesis |
2nd stage division of cytoplasm
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INTERPHASE |
one cell division after another separated by an ''in between'' period of growth |
