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Stack #2116215
| Question | Answer |
|---|---|
| The person credited with first recognizing (in the 1860s) that living cells cannot arise spontaneously, but arise only from previously existing cells, is __________. | Rudolf Virchow |
| The function of the mitotic cell cycle is to produce daughter cells that __________ | are genetically identical to the parent cell (assuming no mutation has occurred) |
| The complex of DNA and protein that makes up a eukaryotic chromosome is properly called __________ | chromatin |
| The region of a chromosome in which the two double strands of replicated DNA are held together is called __________. | centromere |
| The centromere is a region in which __________. | sister chromatids are attached to one another in prophase |
| How many maternal chromosomes are present in a somatic human cell not engaged in cell division? | 23 |
| "Cytokinesis" refers to __________. | the division of the cytoplasm |
| Chromatids are __________. | identical copies of each other if they are part of the same duplicated chromosome |
| If a cell contains 60 chromatids at the start of mitosis, how many chromosomes will be found in each daughter cell at the completion of the cell cycle? | 30 |
| A biochemist measured the amount of DNA in cells growing in the laboratory and found that the quantity of DNA in the cells doubled __________. | between the G1 and G2 phases |
| During interphase, the genetic material of a typical eukaryotic cell is __________. | dispersed in the nucleus as long strands of chromatin |
| DNA replication occurs in __________. | the S phase of interphase |
| If a human somatic cell is just about to divide, it has __________ chromatids. | 92 |
| Down syndrome is characterized by cells having three copies of chromosome 21. As a cell in an individual with Down syndrome prepares to enter mitosis, how many chromatids would be present? | 94 |
| During what phase in the cell cycle would you find the most DNA per cell? | G2 |
| In telophase of mitosis, the mitotic spindle breaks down and the chromatin uncoils. This is essentially the opposite of what happens in __________. | prophase |
| Which of the following phases of mitosis is essentially the OPPOSITE of prometaphase in terms of the nuclear envelope? | telophase |
| Assume that you are dealing with a species in which the number of chromosomes in each somatic cell is 14. How many sister chromatids are present in the early telophase of mitosis? | 0 |
| In a human skin cell that is going through the cell cycle, when do the centrosomes separate? | prophase |
| Following cytokinesis in an animal cell, how many centrioles does each new daughter cell possess? | 2 |
| The phase of mitosis during which the chromosomes move toward separate poles of the cell is __________. | anaphase |
| One event occurring during prophase is __________. | the beginning of the formation of a spindle apparatus |
| During which stage of the cell cycle do sister chromatids separate? | anaphase |
| In animal cell mitosis, the cleavage furrow forms during which stage of the cell cycle? | cytokinesis |
| At which stage of mitosis are chromosomes lined up in one plane in preparation for their separation to opposite poles of the cell? | metaphase |
| You would know that a dividing cell was a plant cell rather than an animal cell if you saw that __________. | it had formed a cell plate |
| Which of the following processes does NOT occur in dividing bacteria? | mitosis |
| During binary fission in a bacterium, __________. | the origins of replication move apart |
| When a cell in S phase is fused with a cell in G1, __________. | DNA synthesis begins immediately in the original G1 nucleus |
| Tissue culture experiments with PDGF demonstrate that without this substance __________. | fibroblasts fail to divide |
| You would be UNLIKELY to see which of the following human cells dividing? | nerve cell |
| Which of the following hypotheses is best supported by observing cancer cells in a culture? | The cancer cells do not exhibit density-dependent inhibition. |
| What is the difference between a benign tumor and a malignant tumor? | Cells of benign tumors do not metastasize; those of malignant tumors do. |
Created by:
sanoe2017