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Chapter 10 Tst
| Question | Answer |
|---|---|
| What happens as a cell grows? | more demands are placed on DNA, food and oxygen are used up more quickly, and the cell has more trouble moving enough materials across its cell membrane |
| what happens to the volume of a cell when length increases? | the volume increases by 100 times whatever the length increases |
| the speed with which wastes are produced by a cell depends on the cells: | volume |
| unlike small cells, large cells have more trouble: | moving needed materials in and waste products out |
| what is cell division? | the process by which a cell divides into 2 daughter cells |
| if a normal cell divides, what can you assume about surface area? | it has grown to its full size |
| what would happen to a cell's DNA were not copied before cell division? | it would have a DNA overload |
| what happens when a cell divides? | each daughter cell receives its own copy of the parent cells DNA |
| what are the phases of the cell cycle? | interphase, mitosis, cytokinesis |
| What takes place in interphase and what does each do? | G1- normal cell activity, S- cell copies its DNA, G2- makes copies of organelles |
| what takes place in mitosis and what does each do? | prophase- nucleolus and nuclear membrane disappear, chromatin starts coiling, metaphase- chromosomes line up in middle, anaphase- chromosomes pull apart at the centromere, telophase- nucleus divides, nucleolus reappears, chromosome uncoil |
| what happens during cytokinesis? | cytoplasm divides |
| what does the cell look like during mitosis? | all divisions are occurring and it is the smallest part |
| during which phase of mitosis are chromosomes visible? | metaphase and prophase |
| what are the phases of mitosis? | prophase, metaphase, anaphase, telophase |
| what is a difference between cell division in plants and animals? | plant cells form a cell plate down the middle of the cell wall |
| during normal cell division, a parent cell having four chromosomes will produce tow daughter cells each containing: | 4 chromosomes |
| how many pairs of chromosomes do we have? | 23 pairs |
| how is the timing of the cell cycle regulated in eukaryotic cells? | by cyclins, growth factors, P53 |
| what is cancer? | uncontrolled cell growth |
| what are the phases of interphase? | G1, S, G2 |
| if a cell has 5 chromosomes in G1 how many chromatids will it have during G2? | 10 |
| what is the difference between chromatids and chromosomes? | chromatids- 2 identical strands joined by a centromere chromosomes- material that makes up chromosomes |
| be able to do a diagram interpretation problem on the phases of mitosis |