21 Mitochondria contain their own DNA, which encodes 13 proteins. Defects on the mitochondrial DNA can be passed down maternally, leading to a group of diseases called mitochondrial cytopathies. Explain which cell populations you think would be most affected by this disease.
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Please answer the question. It is a lab homework for the anatomy and phisology of human cell.
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- I have this same question, but the answer is supposed to involve mitochondrial uncoupling?A mutant haploid strain of Saccharomyces cerevisiae(yeast) called cox2-1 was found that was unable togrow on media containing glycerol as the sole sourceof carbon and energy. (Glycerol is a nonfermentablesubstrate for yeast.) This strain could, however, growon the fermentable substrate glucose. Researchers discovered that cox2-1 cells lack a mitochondrial proteincalled cytochrome c oxidase.a. Explain why cox2-1 cells can grow on mediumcontaining glucose but not on glycerol medium.A mutant haploid strain of Saccharomyces cerevisiae(yeast) called cox2-1 was found that was unable togrow on media containing glycerol as the sole sourceof carbon and energy. (Glycerol is a nonfermentablesubstrate for yeast.) This strain could, however, growon the fermentable substrate glucose. Researchers discovered that cox2-1 cells lack a mitochondrial proteincalled cytochrome c oxidase.a. Explain why cox2-1 cells can grow on mediumcontaining glucose but not on glycerol medium.b. When cox2-1 was crossed with a wild-type yeaststrain and the resultant diploid cells were allowedto grow mitotically, it was found that about half thediploid clones were able to grow on glycerol, whilethe other half could not. The diploid clones thatcould grow on glycerol were induced to sporulate,and they yielded tetrads with four spores that wereall able to grow on glycerol medium. In all of thesetetrads, two of the haploid progeny were of matingtype a and two of mating type α. The diploids thatcould not…
- Explain the mechanism/s through which molecules such as cyanide and rotenone can exert a cytotoxic effect on eukaryotic cells after instances of exposure. In addition describe if you would expect to observe the same phenotype in anaerobic cells or prokaryotic cells after cyanide exposure.In 2016, scientists published the genome of Monoceiconionoides, and demonstrated that this organism has no detectable mitochondrial genes. However, its genome was arranged in linear chromosomes wrapped around histones which are contained within the nucleus. Monoceiconionoides is therefore a(n). Bacteria Archea Eukaryote Endosymbiont- - da a Lenuar UVIUI IS UIE UI Ue processes that support the Cell theory. Consider Figure 1 as eukaryotic cell and to be referred in this question. Figure 1 a) Based on Figure 1, does the cell represent a gamete cell? Justify your answer. b) State the value of 2n in Figure 1. c) Using a labelled diagram, ilustrates the cell in Figure 1 after t undergoes S stage. d) If cell in Figure 1 experienced a non-disjunction event on its largest chromosomes during meiosis 2, illustrates the probable gametes it produces using a labelled diagram. e) Give the probabity percentage for each type of gamete produced in 2d). f) Does cell division in E col and in human cells serves the same purpose? Justify your answer.
- Anaphase B involves the separation of spindle poles. What forces have been proposed to drive this separation? What underlying molecular mechanisms are thought to provide these forces?4. Mitochondrial DNA (mtDNA) encodes some proteins of the ETC. Point mutations of mitochondrial genes can impair the electron transport chain and oxidative phosphorylation. One of the syndrome resulting from disorders of mtDNA-encoding protein is MELAS syndrome (mitochondrial myopathy, encephalomyopathy, lactic acidosis and stroke). The carliest manifestations are the neurological and muscular abnormalities due to the greater dependence of brain, heart and skeletal muscle on mitochondrial ATP synthesis. Explain why 252 Chapter 5. Catabolism and cellular bioenergetics the levels of lactate and pyruvate are increased in MELAS syndrome. For the answer: a) discuss the respiratory control in ETC and significance of the ratio NADH/ NAD; b) describe the reactions of oxidative decarboxylation of pyruvate; c) explain why the disorders in the structures of components of ETC leads to the activation of the reaction, which is catalyzed by lactate dehydrogenase.11:51 B +$. ← MitosisAndMeiosis.docx AD B C D E F 2. In what stage were most of the onion root tip cells? Does this make sense? 4. What would happen if mitosis were uncontrolled? 3. As a cell grows, what happens to its surface area-to-volume ratio (hint: think of a balloon being blown up)? How does this ratio change with respect to cell division? 5. How accurate were your time predictions for each stage of the cell cycle? & ON 5G A A C 6. Discuss one observation you found interesting while looking at the onion root tip cells. Cell Cycle Division: Mitosis Beads Dia ר Dronhaco EXPERIMENT 2: FOLLOWING CHROMOSOMAL DNA MOVEMENT THROUGH MITOSIS PAGE 5/... OeScience Labs, 2016
- Across 11 |15.) process in which a 2n cell does through two successive divisions resulting in four nuclei each is now 1n 3 14 17 16.) the condition of having two sets of chromosomes per nucleus 9-1 10 18.) structure consisting mainly of 11 12 13 Down 14 Eytoplasm that forms and progressively deepens during cytokinesis of animal cells 15 16 17 18 19 10,) a pair of small cylindrical organelles lying at right angles to each lother near the nucleus inn the cytoplasm of animal cells 20 nt 2.Explain a mechanism for how a nuclear-encoded protein is targeted to the inner membrane of the mitochondrion. Explain the mechanism for how a nuclear-encoded protein is targeted to the thylakoid membrane. Describe an experiment that could be conducted to show that there is a targeting system for a nuclear encoded protein that ultimately finds its way to a specific organelle.In Figure 3-20, what color is used to denote cytoplasmcontaining wild-type mitochondria?