1. The Histone group of proteins are found in the: a. Centromere b. Telomere c. Exon sequences d. Nucleosome 2. Mitosis produces gametes. a. True b. False 3. What is the division of the cytoplasm called? a. Telophase b. Cytokinesis c. Pro-metaphase d. Anaphase
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1) The centromere is a region in which A) new spindle microtubules form at either end. B) chromosomes are grouped during telophase. C) the nucleus is located prior to mitosis. D) chromatids remain attached to one another until anaphase. E) metaphase chromosomes become aligned at the metaphase plate. 2) If there are 20 chromatids in a cell, how many centromeres are there? A) 80 B) 10 C) 30 D) 40 E) 20 3) Which is the longest of the mitotic stages? A) anaphase B) telophase C) prometaphase D) metaphase E) prophase 4) A cell containing 92 chromatids at metaphase of mitosis would, at its completion, produce two nuclei each containing how many chromosomes? A) 92 B) 16 C) 23 D) 46 E) 12 5) Cytokinesis usually, but not always, follows mitosis. If a cell completed mitosis but not cytokinesis, the result would be a cell with A) two nuclei but with half the amount of DNA. B) a single large nucleus. C) two nuclei. D) two abnormally small nuclei. E) high concentrations of actin and myosin. 6) The formation of a cell plate is beginning across the middle of a cell and nuclei are re-forming at opposite ends of the cell. What kind of cell is this? A) an animal cell undergoing cytokinesis B) an animal cell in telophase C) an animal cell in metaphase D) a plant cell undergoing cytokinesis E) a plant cell in metaphase 7) Chromosomes first become visible during which phase of mitosis? A) metaphase B) prometaphase C) telophase D) prophase E) anaphase
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2) What region of a eukaryotic chromosome contains the highest density of genes? a. Euchromatin. b. Centromere. c. Condensed heterochromatin. d. Telomere. 3) Which type of pseudogenes is usually located adjacent to their functional genes? a. Processed pseudogenes. b. Non-processed pseudogenes. c. Mitochondrial pseudogenes. d. None of the above. 4) The proteins that bind to DNA in the nucleosome and form a core octamer are called a. Histidines. b. Histones. c. Chromatin. d. Chromatosome. 5) The dark bands produced by G-banding technique are: a. AT rich. b. GC rich. c. Constitutive heterochromatin. d. None of the above. 6) What is the centromere of a chromosome? a. It is the end of the chromosome. b. It is the uncondensed region of a chromosome that contains active genes. c. It is the constricted region of a chromosome where the two copies are held together. d. It is the condensed, transcriptionally silent regions of chromosomes.
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