Chapter 12 Cell Cycle
How many maternal chromosomes are present in a somatic human cell not engaged in cell division? (eText Concept 12.1) 23 46 92 184 None of the listed responses is correct.
23
Which of the following is FALSE regarding sister chromatids? (eText Concept 12.1) - Sister chromatids are separated during mitosis. - Both of the sister chromatids end up in the same daughter cell after cytokinesis has occurred. - Sister chromatids are attached to one another at the centromere. - Sister chromatids form in the S-phase stage of the cell cycle. - Sister chromatids are created when DNA is replicated.
Both sister chromatids end up in the same daughter cell after cytokinesis has occurred This statement if false because each of the sisters end up in a different cell after cell division
The person credited with first recognizing (in the 1860s) that living cells cannot arise spontaneously, but arise only from previously existing cells, is __________. -Watson -Anton van Leeuwenhoek -Robert Hooke -Louis Pasteur -Rudolf Virchow
Rudolf Virchow
The region of a chromosome in which the two double strands of replicated DNA are held together is called __________. (eText Concept 12.1) - a chromatid - chromatin - a centromere - a centriole - an aster
a centromere
The function of the mitotic cell cycle is to produce daughter cells that __________. (eText Concept 12.1) - have the same number of chromatids as the parent cell had chromosomes - are genetically identical to the parent cell (assuming no mutation has occurred) - have the same number of chromosomes as the parent cell but not the same genetic content - have a random assortment of maternal and paternal chromosomes - have none of the listed characteristics
are genetically identical to the parent cell
The complex of DNA and protein that makes up a eukaryotic chromosome is properly called __________. (eText Concept 12.1) - a chromatid - a chromoplast - a centrosome - chromatin - a centromere
chromatin
Chromatids are __________. (eText Concept 12.1) - identical copies of each other if they are part of the same duplicated chromosome - held together by the centrioles - found only in aberrant chromosomes - the bacterial equivalent of eukaryotic chromosomes - composed of RNA
identical copies of each other if they are part of the same duplicated chromosome (two identical sister chromatids)
A cell entering the cell cycle with 32 chromosomes will produce two daughter cells, each with __________. (eText Concept 12.1) 16 chromosomes 64 chromosomes 32 pairs of chromosomes 64 pairs of chromosomes none of the listed numbers of chromosomes
none of the listed number of chromosomes
The centromere is a region in which __________. (eText Concept 12.1) - the new cell plate forms in telophase - chromosomes become aligned during metaphase - microtubules are fastened to the centrioles during anaphase - the chromosomes are connected to the cell plate in metaphase - sister chromatids are attached to one another in prophase
sister chromatids are attached to one another in prophase
"Cytokinesis" refers to __________. (eText Concept 12.1) - the division of the entire cell - the movement of a cell from one place to another - the division of the nucleus - the division of the cytoplasm - the reduction in the number of chromosomes
the division of the cytoplasm
