Ch. 12 Bio - Site Title Campbell BIOLOGY 7th Edition Book...

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Site Title:  Campbell BIOLOGY 7th Edition Book Title:  Biology Book Author:  Campbell Location on Site:  Home > 12: The Cell Cycle > Chapter Quiz Submitted:  February 5, 2008 at 4:11 PM (EST) 98% Correct  of 40 questions 39 correct: 98% 1 incorrect: 3% More information about scoring   1. The person credited with first recognizing (in the 1860s) that living cells cannot arise  spontaneously, but arise only from previously existing cells, is _____. (Overview  ) Your Answer: Rudolf Virchow     Correct. In 1855 Rudolf Virchow stated, "Where a cell exists, there must have been a  preexisitng cell."   2. The function of the cell cycle is to produce daughter cells that _____. (Concept 12.1 ) Your Answer: are genetically identical to the parent cell (assuming no mutation  has occurred)     Correct. Cell division involves the distribution of identical genetic material (DNA) to  two daughter chromosomes.   3. Sister chromatids _____. (Concept 12.1 ) Your Answer: all of the above     Correct. When cytokinesis follows mitosis, the sister chromatids become independent  chromosomes in the two daughter cells.  
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4. The complex of DNA and protein that makes up a eukaryotic chromosome is properly  called _____. (Concept 12.1 ) Your Answer: chromatin     Correct. The DNA-protein complex called chromatin is organized into a long, thin  fiber.   5. The region of a chromosome holding the two double strands of replicated DNA  together is called _____. (Concept 12.1 ) Your Answer: a centromere     Correct. The chromosome has a narrow "waist" at a specialized region, called the  centromere, where the two chromatids are attached to each other.   6. If an intestinal cell in a grasshopper contains 24 chromosomes, a grasshopper sperm  cell would contain _____ chromosomes. (Concept 12.1 ) Your Answer: 12     Correct. The production of gametes by meiosis produces cells with half the  chromosome number of a somatic cell. After fertilization, the diploid chromosome  number is restored.  7. The centromere is a region in which _____. (Concept 12.1 ) Your Answer: sister chromatids are attached to one another in prophase     Correct. The chromosome has a narrow "waist" at a specialized region called the  centromere, where sister chromatids are attached.   8. How many maternal chromosomes are present in a somatic human cell in G 1 (Concept 12.1 ) Your Answer: 23  
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  Correct. Human somatic cells contain a total of 46 chromosomes, half of which are  maternally derived.   9. A cell entering the cell cycle with 32 chromosomes will produce two daughter cells, 
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Ch. 12 Bio - Site Title Campbell BIOLOGY 7th Edition Book...

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