BIO 101 NVCC EXAM 3 Actual Questions and Correct Solutions 2024

BIO 101 NVCC EXAM 3 Actual Questions and Correct Solutions 2024 Eukaryotic chromatin is composed of - Answer -DNA and proteins What is produced if a cell completes mitosis but does not undergo cytokinesis? - Answer -one cell with two nuclei, each identical to the nucleus of the parent cell Humans produce skin cells by mitosis and gametes by meiosis. The nuclei of skin cells produced by mitosis will have - Answer -twice as much DNA as the nuclei of gametes produced by meiosis Compared to most prokaryotic cells, eukaryotic cells typically have - Answer -more DNA molecules and larger genomes. During mitosis in animal cells, at which phase do centrioles begin to move apart? - Answer -prophase Where do the microtubules of the spindle originate during mitosis in animal cells? - Answer -centrosome A group of cells is assayed for DNA content immediately following mitosis and is found to have an average of 8 picograms of DNA per nucleus. How many picograms would be found at the end of S and the end of G2? - Answer -16; 16 What is a cleavage furrow? - Answer -a groove in the plasma membrane between daughter nuclei Cells from advanced malignant tumors frequently have very abnormal chromosomes as well as an abnormal number of chromosomes. What might explain the association between malignant tumors and chromosomal abnormalities? - Answer -Cell cycle checkpoints are not in place to stop cells with chromosome abnormalities. Which is the first checkpoint in the cell cycle where a cell will be caused to exit the cycle if this point is not passed? - Answer -G1 Which of the following is true concerning cancer cells? - Answer -They evade the normal controls that trigger programmed cell death Most animal cells exhibit anchorage dependence, which means that in order to divide - Answer -cells must be attached to a substrate or extracellular matrix of a tissue. Researchers began a study of a cultured cell line. Their preliminary observations showed them that the cell line did not exhibit either density-dependent inhibition or anchorage dependence. What could they conclude right away? - Answer -The cells show characteristics of tumors.