Raw Practice Exam1213161718NOANSWERS

Raw Practice Exam1213161718NOANSWERS - Practice Exam 3...

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1 Practice Exam 3 Chapter 12 Section 2) What is a chromatid? A) a chromosome in G 1 of the cell cycle B) a replicate chromosome C) a chromosome found outside the nucleus D) a special region that holds two centromeres together E) another name for the chromosomes found in genetics 4) If there are 20 chromatids in a cell, how many centromeres are there? A) 10 B) 20 C) 30 D) 40 E) 80 6) How do the daughter cells at the end of mitosis and cytokinesis compare with their parent cell when it was in G 1 of the cell cycle? A) The daughter cells have half the amount of cytoplasm and half the amount of DNA. B) The daughter cells have half the number of chromosomes and half the amount of DNA. C) The daughter cells have the same number of chromosomes and half the amount of DNA. D) The daughter cells have the same number of chromosomes and the same amount of DNA. E) The daughter cells have the same number of chromosomes and twice the amount of DNA. Figure 12.2 15) If the cell whose nuclear material is shown in Figure 12.2 continues toward completion of mitosis, which of the following events would occur next? A) cell membrane synthesis B) spindle fiber formation C) nuclear envelope breakdown D) formation of telophase nuclei E) synthesis of chromatids
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2 17) If there are 20 chromatids in a cell at metaphase, how many chromosomes are there in each daughter cell following cytokinesis? A) 10 B) 20 C) 30 D) 40 E) 80 43) If mammalian cells receive a go - ahead signal at the G 1 checkpoint, they will A) move directly into telophase. B) complete the cycle and divide. C) exit the cycle and switch to a nondividing state. D) show a drop in MPF concentration. E) complete cytokinesis and form new cell walls. 44) Cells that are in a nondividing state are in which phase? A) G 0 B) G 2 C) G 1 D) S E) M Chapter 13 Section 2) Which of the following statements about genes is incorrect ? A) Genes correspond to segments of DNA. B) Many genes contain the information needed for cells to synthesize enzymes and other proteins. C) During fertilization, both the sperm and the ovum contribute genes to the resulting fertilized egg. D) One gene only is used in a specific cell type. E) Genetic differences can result from changes in the DNA called mutations. 7) A gene ʹ s location along a chromosome is known as which of the following? A) Allele B) Sequence C) Locus D) Variant E) Trait 8) What is a karyotype? A) The set of unique physical characteristics that define an individual B) The collection of all the mutations present within the genome of an individual C) The combination of chromosomes found in a gamete D) A system of classifying cell nuclei E) A display of every pair of homologous chromosomes within a cell, organized according to size and shape
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3 23) A given organism has 46 chromosomes in its karyotype. We can therefore conclude which of the following? A)
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This note was uploaded on 02/25/2011 for the course BIO 1105 taught by Professor Dawkins during the Spring '10 term at McKendree.

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Raw Practice Exam1213161718NOANSWERS - Practice Exam 3...

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