Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 14, Problem 3TY
Checkpoints during the cell cycle are important because they
- allow the organelle activity to catch up to cellular demands.
- ensure the integrity of the cell’s DNA.
- allow the cell to generate sufficient ATP for cellular division.
- are the only time
DNA replication can occur. - do all of the above.
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Explain what happens at each phase of cell cycle:
-DNA replication (when, where, how? Use terms such as DNA polymerase, complimentary base pairs)
-Interphase (G1, S, G2)
-Mitosis (overall goal of prophase, metaphase, anaphase, telophase, cytokinesis)
During a cell cycle, a cell arrests (stops) in G2. Which of the following events has occurred by this point?
cells have divided.
Microtubules are produced.
Sister chromatids are produced.
mitosis has begun.
which of the following would indicate that a cell is in metaphase?
Thin, threadlike chromosomes are widely dispersed in the nucleus.
Chromosomes appear as dark granules in the nucleus.
Centromeres of chromosomes lie on the equator of the cell.
Two sets of chromosomes are present on opposite poles of the cell.
Chapter 14 Solutions
Principles of Biology
Ch. 14.1 - Researchers usually treat cells with drugs that...Ch. 14.1 - Researchers usually treat cells with drugs that...Ch. 14.1 - Refer back to Figure 13.13. How do checkpoint...Ch. 14.1 - A cell that is diploid has two chromosomes. pairs...Ch. 14.1 - In eukaryotes, DNA replication produces sister...Ch. 14.1 - Prob. 3TYKCh. 14.2 - Refer back to the karyotype in Figure 14.1. In...Ch. 14.2 - What are the functions of the three types of...Ch. 14.2 - Prob. 1TYKCh. 14.2 - Prob. 2TYK
Ch. 14.2 - Sister chromatids separate from each other during...Ch. 14.2 - With regard to chromosome composition, how does...Ch. 14.3 - Prob. 1CCCh. 14.3 - Prob. 2CCCh. 14.3 - What is the main reason for meiosis in animals?...Ch. 14.3 - In meiosis I, crossing over occurs during...Ch. 14.3 - Prob. 2TYKCh. 14.3 - Prob. 3TYKCh. 14.4 - Prob. 1CCCh. 14.4 - A chromosome in which the telomere is at one end...Ch. 14.4 - Prob. 2TYKCh. 14.4 - Prob. 3TYKCh. 14 - Prob. 1TYCh. 14 - Prob. 2TYCh. 14 - Checkpoints during the cell cycle are important...Ch. 14 - Prob. 4TYCh. 14 - Prob. 5TYCh. 14 - Prob. 6TYCh. 14 - Prob. 7TYCh. 14 - Prob. 8TYCh. 14 - Prob. 9TYCh. 14 - Prob. 10TYCh. 14 - Distinguish between homologous chromosomes and...Ch. 14 - The Oca2 gene, which influences eye color in...Ch. 14 - PRINCIPLES A principle of biology is that cells...Ch. 14 - Why is it necessary for chromosomes to condense...
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- In the cell cycle, at which stages do two chromatids make up one chromosome? a. beginning of mitosis b. end of G1 c. beginning of S d. end of mitosis e. beginning of G2arrow_forwardWhich of the following is mismatched? M stage - mitosis and cytokinesis G 2 stage - metabolic preparation for mitosis interphase - shortest stage of the cell cycle G 1 stage - cell grows in size and cell organelles increase in number S stage - DNA synthesisarrow_forwardWhich 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 cellsarrow_forward
- Which of the following scenarios accurately describes the actions occurring during the S phase? Group of answer choices The chromosome number is halved in preparation for cell division. The cell enlarges, proteins are increased and organelles are duplicated. Cell reaches maximum size and adds more proteins. Each chromosome is duplicated; each chromosome results in two sister chromatids attached at a centromere.arrow_forwardDuring the cell cycle there are three checkpoints. Match each description with the correct checkpoint. Requires growth signals and checks there are no mutation in the DNA Checks that DNA is properly replicated and that all the organelles and proteins needed for division are present Ensures that all the chromosomes are lined up and accounted for A. G1/S B. S/G2 C. G2/M D. Metaphase/Anaphase E. Anaphase/Telophasearrow_forwardThe cell cycle results in the production of ______. four cells, each with the same amount of genetic material but with different genetic information two cells, each with the same amount of genetic material and the same genetic information four cells, each with the same amount of genetic material and the same genetic information two cells, each with the same amount of genetic material but with different genetic informationarrow_forward
- For the cell cycle to progress normally, the protein ________ must be destroyed by____. Select one: a. cyclin, a protease b. nuclear membrane, phosphorylation c. cdk, a protease d. cyclin, apoptosis e. cdk, apoptosisarrow_forwardWhat happens during the S phase of the cell cycle? The cell divides The cell undergoes its final preparation for division The cell undergoes its initial growth phase The cell replicates its DNAarrow_forwardMitosisis divided into phases. Match the phase to its characteristic. Chromosomes begin to relax, and new nuclear membranes form Sister chromatids are pulled apart by microtubules of the spindle Condensed chromosomes line up in the center of the cell Nuclear membrane breaks down, chromosomes attach to microtubules Chromosomes begin to condense Cell physically divides (cytoplasm is divided)arrow_forward
- The major stages of the cell cycle are (in order) Group of answer choices a. G, S1, M, S2 b. S1, S2, G, M c. G1, S, G2, M d. S1, M1, G, M2 e. G1, M, G2, Sarrow_forwardCheckpoints during cell cycle control are important to ensure: Tumor suppression Cell growth Protein synthesis Genome integrityarrow_forwardPhases of the cell cycle (Mitosis) Interphase DNA, in the form of chromatin, replicates. Nucleolus is present, but may not be visible. Nucleus is clearly visible.arrow_forward
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