When studying living cells in a laboratory, researchers sometimesuse drugs as a way to cause cells to remain in a particular phaseof the cell cycle. For example, aphidicolin inhibits DNA synthesisin eukaryotic cells and causes them to remain in the G1 phasebecause they cannot replicate their DNA. In what phase of thecell cycle—G1, S, G2, prophase, metaphase, anaphase, or telophase—would you expect somatic cells to stay if the followingtypes of drug were added?A. A drug that inhibits microtubule formationB. A drug that allows microtubules to form but prevents themfrom shorteningC. A drug that inhibits cytokinesisD. A drug that prevents chromosomal condensation

When studying living cells in a laboratory, researchers sometimesuse drugs as a way to cause cells to remain in a particular phaseof the cell cycle. For example, aphidicolin inhibits DNA synthesisin eukaryotic cells and causes them to remain in the G1 phasebecause they cannot replicate their DNA. In what phase of thecell cycle—G1, S, G2, prophase, metaphase, anaphase, or telophase—would you expect somatic cells to stay if the followingtypes of drug were added?A. A drug that inhibits microtubule formationB. A drug that allows microtubules to form but prevents themfrom shorteningC. A drug that inhibits cytokinesisD. A drug that prevents chromosomal condensation

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter6: Reproduction At The Cellular Level

Section: Chapter Questions

Problem 4RQ: Chromosomes are duplicated during what portion of the cell cycle? a. G 1 phase b. S phase c....

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When studying living cells in a laboratory, researchers sometimesuse drugs as a way to make cells remain at a particular stage of thecell cycle. For example, aphidicolin is an antibiotic that inhibitsDNA synthesis in eukaryotic cells and causes them to remain inthe G1 phase because they cannot replicate their DNA. In whatphase of the cell cycle—G1, S, G2, prophase, metaphase, anaphase,or telophase—would you expect somatic cells to stay if they weretreated with each of the following types of drug?A. A drug that inhibits microtubule formationB. A drug that allows microtubules to form but prevents them fromshorteningC. A drug that inhibits cytokinesisD. A drug that prevents chromosomal condensation
Discuss the cell cycle with the aid of a diagram. 6-8 hours INTERPHASE Sphase DNA I replicated 6-10 hours G, phase Cell metabolically active; duplicates organelles and cytosolic components starts replicating G, phase Cell growth continues enzymes and other proteins are synthesized and replication of centrosomes is completed 46 hours Exit from cell cycle nondividing cell) centrosomes. MITOTIC (M) PHASE Prophase Metaphase Anaphase Telophase
A section of elodea leaf is stained and examined under a microscope. The total number of cells in each stage of the cell cycle is as follows: Interphase- 150 Prophase- 20 Prometaphase- 11 Metaphase- 6 Anaphase- 5 Telophase- 1 If the complete cell cycle in an elodea leaf is 24 hrs. What is the average duration of metaphase in the cycle. Assume no cells are in G0.
Which phase is described below? The chromosomes condense, Each is made of two sister chromatids,(looks) like an "X" Each sister is a clone, the closest of kin, And acentromere connects them like siamese twinsThe nucleolus disappears it melts away, as the cell takes a ribosomeproduction holiday, the centrosomes separate, start spindle formationfor separating chromatids and cell elongation.
When considering the stages of the cell cycle, which stage is best associated with cells that do not divide, such as nerve cells? G1 phase M phase O None - all cells divide S phase G2 phase GO phase Pickles are often preserved in a 20-30% salt solution called brine. How does brine prevent contamination by microorganisms? Bacteria can't survive in hypotonic solutions because of the added pressure of the water they take in causing them to burst. O Bacteria can't survive in a hypertonic solution because they lose too much water and die. O The high salt concentration increases the pH of the environment, making it unfavorable for bacteria to live there. The high salt concentration creates an isotonic environment that the bacteria cannot live in. Bacteria cells are unable to digest the salt, thus killing the cells by starvation.
What is the correct order for the following events according to the cell cycle stages? (chromosomes align up in midplane of the cell, sister chromatids begin to move toward the poles, cytoplasm divides) * O telophase, cytokinesis, anaphase O metaphase, telophase, cytokinesis O metaphase, anaphase, cytokinesis prophase, anaphase, metaphase O anaphase, prophase, telophase DNIA fton contain genes that give
What is the correct order for the following events according to the cell cycle stages? (chromosomes align up in midplane of the cell, sister chromatids begin to move toward the poles, cytoplasm divides) * telophase, cytokinesis, anaphase metaphase, telophase, cytokinesis O metaphase, anaphase, cytokinesis prophase, anaphase, metaphase anaphase, prophase, telophase OOOO
Assume that you are growing mammalian cells in culture. You are able to synchronize the culture, meaning all of the cells undergo each stage of the cell cycle at the same time. The graph shows themamount of DNA in the nuclei of cells during cycle 1 and cycle 2 of cell growth II III IV First eycle Second evcle Amount of DNA in nucleus
What is the sequence of events in a typical eukaryotic cell cycle? O G1 to G2 to S to mitosis to cytokinesis G1 to S to G2 to mitosis to cytokinesis G1 to S to G2 to cytokinesis to mitosis O G1 to G2 to mitosis to S to cytokinesis OS to G1 to G2 to mitosis to cytokinesis
Which of the following statments about the cell cycles is correct? When the S phase of the cell cycle is finished, a cell has twice as many chromatids as the number of chromosomes in the G1 phase In actively dividing cells, the S and G2 phases are collectively known as interphase The phases of the cell cycle are G1, S, and M phases The cell cycle is a sequence of replications and divisions that produces new cells
Cells normally contain fully or partially replicated chromosomes in all of the following stages of the cell cycle except: G1 G2 prophase metaphase S
The figure below shows the number of chromosomes observed in an actively dividing cell at each stage of cell division. A B number of chromsomes per cell C 100 90 D 80 A bar graph comparing the number of chromosomes at different stages of cell division. 20 Which of the following best explains the change in the number of chromosomes between metaphase and anaphase? prophase metaphase anaphase telophase cytokinesis stage of cell division New chromosomes formed during prophase are doubled during anaphase. DNA replication occurs between metaphase and anaphase, doubling the number of chromosomes. During metaphase, a cell contains identical copies of each chromosome, and then trans- forms into sister chromatids. During anaphase, the chromatids are separated, each becoming independent chromo- somes in its respective new cell