front 1 A bacterial chromosome consists of: | back 1 a circular DNA molecule many times larger than the cell |
front 2 Eukaryotic chromosomes consists of: | back 2 Linear DNA molecules complexed with positively charged his tone proteins |
front 3 Nucleosomes are best described as: | back 3 eukaryotic DNA associated with histone proteins |
front 4 What is the function of nucleosomes? | back 4 To prevent DNA strands from tangling |
front 5 Nucleosomes are organized into large coiled loops help together by: | back 5 scaffolding proteins |
front 6 The cell cycle of a typical somatic cell consists of _____ and M phase | back 6 interphase |
front 7 The M phase of the cell cycle involves two main processes: | back 7 mitosis and cytokinesis |
front 8 One nerve cells become mature, they don't usually undergo cell division. Based on your knowledge of the cell cycle, you would predict that mature nerve cells become arrested in the ______ of the cell cycle. | back 8 Go phase |
front 9 Chromosomes are duplicated during_______ of the cell cycle. | back 9 S phase |
front 10 Which of the following represents the overall sequence of events during mitosis? | back 10 Prophase, prometaphase, metaphase,anaphase,telophase |
front 11 If a cell is in G2: | back 11 it Has twice has much DNA found than in telophase nucleus |
front 12 During prophase,____ is(are) compacted into visible chromosomes. | back 12 chromatin |
front 13 The ______ is responsible for the separation of the chromosomes during_____ of mitosis. | back 13 mitotic spindle; anaphase |
front 14 _______contain identical DNA sequences and are held together by ________ during mitosis | back 14 Sister chromatids: centromeres |
front 15 The mitotic spindle is made of: | back 15 microtubules |
front 16 The kinetochore serves which of the following functions? | back 16 Kinetochores attach to microtubules during mitosis |
front 17 All of the following events occur during pro metaphase EXCEPT | back 17 the duplicated chromosomes become visible with the light microscope |
front 18 A cell is in metaphase if: | back 18 the chromosomes are aligned at the mid plane of the cell |
front 19 Duplicated centrioles move to opposite poles of a dividing _____ cell during ____ of the cell cycle | back 19 animal;prophase |
front 20 The chromosome makeup of an individual organism is called a: | back 20 karyotype |
front 21 Chromosomes are condensed to their greatest extent during_____ of mitosis | back 21 metaphase |
front 22 Cytokinesis in animal cells involves contraction of a ring of ______ microfilaments | back 22 actin plus myosin |
front 23 Cytokinesis in plant cels occurs via the formation of a(n): | back 23 Cell plate |
front 24 If a cell is dividing by binary fission then you know that: | back 24 The cell is prokaryotic |
front 25 To prevent disastrous consequences, the eukaryotic cell cycle is controlled by: | back 25 a series of cell cycle checkpoints |
front 26 Which of the following statements concerning the cell cycle is FALSE? | back 26 M-Cdk inhibits mitosis |
front 27 The correct number of chromosomes is maintained during sexual reproduction by: | back 27 meiosis, which reduces the chromosome number by half |
front 28 Animal cells are stimulated to divided by mitosis by: | back 28 growth factors |
front 29 If meiosis did not occur in sexually reproducing organisms, then: | back 29 chromosome number would double in each generation |
front 30 What evolutionary advantage is provided by sexual reproduction? | back 30 increased genetic diversity |
front 31 Plant hormones known as_______ stimulate mitosis | back 31 cytokinins |
front 32 Homologous chromsomes undergo synapsis during: | back 32 Prophase 1 |
front 33 A maternal homologue and a paternal homologue synapse to form: | back 33 a tetrad |
front 34 During which phase does crossing-over occur? | back 34 prophase 1 |
front 35 A zygote contains the _______ number of chromosomes | back 35 diploid |
front 36 In a human cell at prophase 1, there are_______ tetrads. | back 36 23 |
front 37 An animal with a diploid number of 36 chromosomes will have ______ chromosomes in its gametes and _______ chromosomes in its somatic cells | back 37 18:36 |
front 38 During prophase 1, each chiasma represents: | back 38 a site of crossing over |
front 39 During which of the following stages of meiosis do the sister chromatids separate? | back 39 anaphase 2 |
front 40 Which of the following events does not occur in prophase 2? | back 40 Formation of chiastma |
front 41 The sources of genetic variation during meiosis are: | back 41 crossing over and the random assortment of maternal and paternal chromosomes |
front 42 Which of the following events does not occur during meiosis 1? | back 42 separation of sister chromatids |
front 43 Refer to Figure 10-1. Which of the following combinations of letters accurately represents two sister chromatids? | back 43 A and C |
front 44 Refer to Figure 10-1. Which of the following combinations of letters accurately represents two homologous chromatids? | back 44 A and D |
front 45 The formation of female gametes is termed: | back 45 Oogenesis |
front 46 which of the following are NOT produced by meiosis? | back 46 Zygotes |
front 47 Refer to figure 10-2. The chromosome complement of item 6 in the life cycle is: | back 47 haploid |
front 48 Figure 10-2. The process occurring at arrow 3 in the associated figure is: | back 48 meiosis |
front 49 Gametophyte plants produce gametes using: | back 49 mitosis |
front 50 Sporophyte plants produce spores using: | back 50 meiosis |