Domanda del libro di testo
What major events occur during anaphase of mitosis?
1516
views
Ch. 12 - The Cell Cycle
Freeman8th EditionBiological ScienceISBN: 9780138276263
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
TOC.tableOfContents
- Ch. 1 - Biology: The Study of Life13
- Ch. 2 - Water and Carbon: The Chemical Basis of Life14
- Ch.3 - Protein Structure and Function10
- Ch.4 - Nucleic Acids and the RNA World10
- Ch. 5 - An Introduction to Carbohydrates10
- Ch. 6 - Lipids, Membranes, and the First Cells11
- Ch. 7 - Inside the Cell10
- Ch. 8 - Energy and Enzymes: An Introduction to Metabolism10
- Ch. 9 - Cellular Respiration and Fermentation11
- Ch. 10 - Photosynthesis12
- Ch. 11 - Cell-Cell Interactions12
- Ch. 12 - The Cell Cycle8
- Ch. 13 - Meiosis12
- Ch. 14 - Mendel and the Gene23
- Ch. 15 - DNA and the Gene: Synthesis and Repair15
- Ch. 16 - How Genes Work16
- Ch. 17 - Transcription, RNA Processing, and Translation16
- Ch. 18 - Control of Gene Expression in Bacteria16
- Ch. 19 - Control of Gene Expression in Eukaryotes12
- Ch. 20 - The Molecular Revolution: Biotechnology, Genomics, and New Frontiers15
- Ch. 21 - Genes, Development, and Evolution12
- Ch. 22 - Evolution by Natural Selection16
- Ch. 23 - Evolutionary Processes13
- Ch. 24 - Speciation15
- Ch. 25 - Phylogenies and the History of Life13
- Ch. 26 - Bacteria and Archaea15
- Ch. 27 - Diversification of Eukaryotes16
- Ch. 28 - Green Algae and Land Plants16
- Ch. 29 - Fungi18
- Ch. 30 - An Introduction to Animals9
- Ch. 31 - Protostome Animals15
- Ch. 32 - Deuterostome Animals17
- Ch. 33 - Viruses16
- Ch. 34 - Plant Form and Function16
- Ch. 35 - Water and Sugar Transport in Plants16
- Ch. 36 - Plant Nutrition13
- Ch. 37 - Plant Sensory Systems, Signals, and Responses16
- Ch. 38 - Flowering Plant Reproduction and Development16
- Ch. 39 - Animal Form and Function17
- Ch. 40 - Water and Electrolyte Balance in Animals16
- Ch. 41 - Animal Nutrition16
- Ch. 42 - Gas Exchange and Circulation16
- Ch. 43 - Animal Nervous Systems16
- Ch. 44 - Animal Sensory Systems16
- Ch. 45 - Animal Movement11
- Ch. 46 - Chemical Signals in Animals16
- Ch. 47 - Animal Reproduction and Development16
- Ch. 48 - The Immune System in Animals16
- Ch. 49 - An Introduction to Ecology15
- Ch. 50 - Behavioral Ecology16
- Ch. 51 - Population Ecology16
- Ch. 52 - Community Ecology20
- Ch. 53 - Ecosystems and Global Ecology17
- Ch. 54 - Biodiversity and Conservation Ecology18
Freeman8th EditionBiological ScienceISBN: 9780138276263Non è quello che usi tu?Cambia libro di testo
Capitolo 12, Problema 6
What evidence suggests that during anaphase, kinetochore microtubules shorten at the kinetochore?
Guida verificata passo dopo passo1
Step 1: Understand the question. The question is asking for evidence that suggests that during anaphase, kinetochore microtubules shorten at the kinetochore. Anaphase is a stage in mitosis and meiosis where the chromosomes separate. Kinetochore microtubules are structures that help in this separation process.
Step 2: Recall what happens during anaphase. During anaphase, the sister chromatids separate and move towards opposite poles of the cell. This movement is facilitated by the kinetochore microtubules.
Step 3: Consider the evidence. One piece of evidence is the observation that during anaphase, the kinetochores remain stationary relative to the poles of the cell, even as the chromosomes move towards the poles. This suggests that the microtubules are shortening at the kinetochore, pulling the chromosomes along.
Step 4: Consider additional evidence. Another piece of evidence comes from experiments where fluorescent markers are used to label the ends of the microtubules. These experiments show that the ends of the microtubules at the kinetochore become less fluorescent over time, indicating that they are shortening.
Step 5: Summarize the evidence. The stationary position of the kinetochores relative to the poles of the cell and the decrease in fluorescence at the ends of the microtubules both suggest that during anaphase, kinetochore microtubules shorten at the kinetochore.
Risposta video verificata per un problema simile:
Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
2mConcetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Anaphase
Anaphase is a stage in mitosis where sister chromatids are pulled apart toward opposite poles of the cell. This process is crucial for ensuring that each daughter cell receives an identical set of chromosomes. During anaphase, the cohesin proteins that hold the sister chromatids together are cleaved, allowing the microtubules to exert force and facilitate their movement.
Video consigliato:
02:39
Anaphase
Kinetochore Microtubules
Kinetochore microtubules are specialized structures that connect the spindle apparatus to the kinetochore, a protein complex assembled on the centromere of each chromosome. These microtubules play a vital role in chromosome movement during cell division by attaching to the kinetochores and pulling the chromatids apart. Their dynamic nature allows them to grow and shorten, which is essential for the proper segregation of chromosomes.
Video consigliato:
03:20Prometaphase
Microtubule Dynamics
Microtubule dynamics refer to the continuous process of growth and shrinkage of microtubules, driven by the addition and loss of tubulin subunits. During anaphase, evidence suggests that kinetochore microtubules shorten as they pull chromatids toward the poles. This shortening is thought to be facilitated by depolymerization at the kinetochore end, which generates the force necessary for chromatid movement.
Video consigliato:
03:37Disturbances Make Communities Dynamic
Pratica correlata
Domanda del libro di testo
When a fruit fly embryo first begins to develop, a large cell is generated that contains over 8000 genetically identical nuclei. What is most likely responsible for this result?
2382
views
Domanda del libro di testo
Progression through the cell cycle is regulated by oscillations in the concentration of which type of molecule?
a. p53, Rb, and other tumor suppressors
b. Receptor tyrosine kinases
c. Cyclins
d. Cyclin-dependent kinases
2942
views
Domanda del libro di testo
Compare and contrast the effects of removing growth factors from asynchronous cultures of human cells that are normal and those that are cancerous.
1560
views
Domanda del libro di testo
A particular cell type spends 4 hours in G1 phase, 2 hours in S-phase, 2 hours in G2 phase, and 30 minutes in M-phase. If a pulse-chase experiment were performed with radioactive thymidine on an asynchronous culture of such cells, what percentage of mitotic cells would be radiolabeled 9 hours after the pulse?
a. 0 percent
b. 50 percent
c. 75 percent
d. 100 percent
2328
views
Domanda del libro di testo
Identify at least two events in the cell cycle that must be completed successfully for daughter cells to share an identical complement of chromosomes.
2066
views