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Q 1/66
Score 0
Which of the following statements about stem cells is true?
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They are found only in embryos and in the bone marrow of adults.
They are able to differentiate into a variety of cell types.
They are found only in embryos.
They are "perpetual" parent cells that never produce daughter cells.
Q 2/66
Score 0
The DNA in a chromosome most resembles
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beads on a string.
a spiral staircase.
a pleated sheet.
a straight road.
66 questions
Q.
Which of the following statements about stem cells is true?
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The DNA in a chromosome most resembles
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All of the following may be found in a DNA nucleotide EXCEPT:
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Which of the following is the correct structure of a nucleotide?
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Genetic inheritance is based on what type of molecule?
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In DNA, phosphate binds to
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In Eukaryotes the repeating sequence of cells dividing, growing, and dividing again is called
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Which of the following is an example of asexual reproduction in eukaryotes?
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When a cell divides via asexual reproduction....
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A bacterial cell splits into two new cells by a process called
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The genetic material in bacteria consists of
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What is the longest-lasting phase of the prokaryotic cell cycle?
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How do prokaryotic and eukaryotic chromosomes differ?
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In prokaryotes, the DNA molecule is
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In prokaryotes, the term "prokaryotic fission" specifically refers to
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What is the function of the histones that are found in a chromosome?
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The two ends of a single chromosome are called
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The site on a chromosome where microtubules attach during cell division is the
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A photograph of all the stained, prepared chromosomes in a eukaryotic cell is referred to as a
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In a typical human body cell, how many chromosomes are there (I am asking for total chromosomes and not.. pairs of chromosomes)?
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A typical human body cell contains how many sex chromosomes?
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The sex-determining chromosomes of a human male are the
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Meiotic cell division in animals occurs in the ________ and results in the production of ________.
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Which type of eukaryotic cell contains two types of each chromosome?
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Which of the following organisms does NOT reproduce its cells by mitosis and cytokinesis?
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During which phase of the eukaryotic cell cycle does DNA and chromosome replication occur?
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During which phase of the eukaryotic cell cycle do growth and nutrient acquisition occur?
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All of the following eukaryotes can reproduce asexually EXCEPT:
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Which of the following is the correct sequence of stages in mitotic cell division?
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During which phase of mitosis do sister chromatids separate from each other?
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During which phase of mitosis do chromosomes condense?
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During which phase of mitosis do the centromeres line up along the cell equator?
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Nuclear envelopes form during which phase of mitosis?
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After which phase of mitosis does cytokinesis occur?
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Which phase of mitosis is a "preparatory" step involving the development of spindle microtubules?
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The protein-containing structure on the centromere where microtubules attach is called the
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In animal cells, spindle microtubules originate from structures called
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What occurs immediately following cytokinesis?
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What would be a consequence of a mutation that disables the production of cyclin-dependent kinases (Cdks)?
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Cdks are activated only when they bind to
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Kinases are responsible for the addition of ________ to other proteins.
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Growth factors stimulate
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Cancer is essentially
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Which of the following is the correct sequence in a cyclin-Cdk pathway?
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The different forms of a gene-for example, those responsible for eye color-are called
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Sexual reproduction allows for
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Which of the following occurs during meiosis?
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In eukaryotes, gametes are produced by
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How many daughter cells are produced from each parent cell during meiosis?
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When gametes fuse during fertilization, a(n) ________ is produced.
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During meiosis, maternal and paternal chromosomes can exchange genetic material at sites called
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Chiasmata are the locations of
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How many haploid cells are produced by one diploid cell during meiosis?
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What is a major difference between mitosis and meiosis?
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How does anaphase of mitosis differ from anaphase I of meiosis?
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In meiosis, sister chromatids separate during
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During meiosis, the cytokinesis that follows telophase II results in
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The most common method of bacterial reproduction is
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Mitosis is division of the ________, whereas cytokinesis is division of the ________.
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Beginning with a newly formed daughter cell, what is the order of the other stages of the eukaryotic cell cycle?
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In eukaryotic cells, chromosomes are composed of both DNA and histone proteins. True or False?
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Most prokaryotes reproduce via a form of asexual reproduction called prokaryotic fission. True or False?
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The uncoiled DNA in a eukaryotic cell is much longer than the cell itself. True or False?
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Mutations may be detrimental, beneficial, or neutral to the cell or organism in which they occur. True or False?
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Based on this figure, the rules for nucleotide base pairing in DNA must be
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Q.
Based on this figure, what would be the consequence of exposure to a synthetic chemical in the environment that mimics the structure and shape of a growth factor?
