DNA in 34) In a human cell, the only stage the nucleus is phase. here there are
ID: 207159 • Letter: D
Question
DNA in 34) In a human cell, the only stage the nucleus is phase. here there are 46 duplexes ot D ucleus ia n cell the only stage of the cell cycle where there are 45 duplexes ot DNA b) S c) G2 d) M 35-37, refer to the model for the G2-M checkpoint shown on page 10 of your exam. mitoslsic h of the ollowing changes in a cell would permanently block a cell from entering a) A gain of function mutation in TK2's kinase domain that allows it function without TK2 phosphorylation ss of function mutation in Cyclin B that eliminates its binding to CDK horylation d) A gain of function mutation that allows MPF to function even if CDK is phosphorylated 36) What type of protein is CDK? a) a transcription factor b) a kinase c) a cyclin protein d) a phosphatase 37) If a cell had a gain of function mutation in TF that mimicked phosphorylation, what would be observed in the cell? a) Nothing-the cell would resemble a wild type cell b) Cyclin B would not be expressed in this cell, shutting down entry into M phase c) Cyclin B would be expressed resulting in a continuous presence of MPF in the cell d) Overexpression of cdc25 will lead to increased levels of active MPF and unregulated cell cycle progression 38) During mitosis, microtubules attach to chromosomes at which of the following structures? a) Chromatids b) Kinetochores c) Asters d) Centrosomes 39) A rabbit has 44 chromosomes in its somatic cells. Which of the following is true? a) A rabbit cell in G2 phase has 44 chromosomes and 88 pairs of sister chromatids b) A rabbit cell in Prophase has 88 chromosomes and 44 pairs of sister chromatids c) A rabbit cell in G1 phase has 44 chromosomes and 44 pairs of sister chromatids d) A rabbit cell in G2 phase has 44 chromosomes and 44 pairs of sister chromatidsExplanation / Answer
Answer:
34) In a human cell, the only stage of the cell cycle where there are 46 duplexes of DNA in the nucleus is:
35) Which of the following changes in a cell would permanently block a cell from entering mitosis?
36) What type of protein is CDK?
37) If a cell had a gain of function mutation in TF that mimicked phosphorylation what would be observed in a cell?
38) During mitosis, microtubules attach to chromosomes at which of the following structures?
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