What establish linkages between the replicated DNAmolecules, which are essential for their accurate segregationlater in the cell cycle. This linking mechanism is coupled toDNA replication.
Q: the role of DNA ligase I.
A: Answer. DNA ligases are the enzymes that are required by all organisms to sustain the structural…
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A:
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Q: Describe how this type of DNA repair works
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Q: how can the chromosome packaging inside the nucleolus
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What establish linkages between the
molecules, which are essential for their accurate segregation
later in the cell cycle. This linking mechanism is coupled to
DNA replication.
Step by step
Solved in 2 steps
- how continuous replication proceeds. Describe how discontinuous replicatioproceeds.True or False? Chromatin remodeling involves addition or removal of chemical groups to histones, which alters its binding affinity to DNA and influences whether the promoter region is available for RNApol to bind.Histones and DNA polymerase subunits are both synthesized in the cytosol but they function in the nucleus: histones in packaging DNA and the polymerase in replicating DNA. How are they imported into the nucleus? Compare the import process for histones to that for DNA polymerase subunits.
- Chromosomal Basis of Heredity Eukaryotic chromosomes are thousands of times longer than a typical cell. Explain how chromosomes can fit inside a eukaryotic nucleus. How are chromosomes in eukaryotic cells packaged? Chromosome abnormalities can be structural or numerical. Enumerate at least 3 examples of each, giving the numerical or structural changes in the chromosomes.DNA replication is fast, virtually error-free, and coordinated with celldivision. Discuss which of these three features you think is the mostimportant.why Most somatic cells do not express telomerase
- Replication and segregation of eukaryotic chromosomesrequire three functional elements: replication origins, a centromere, and telomeres. How would a chromosome be affected ifit lacked (a) replication origins or (b) a centromere?Assume that a certain bacterial chromosome has one origin of replication. Under some conditions of rapid celldivision, replication could start from the origin before thepreceding replication cycle is complete. How many replication forks would be present under these conditions?Cells lacking telomerase can grow for several cell divisions without obvious defects. However, after more cell divisions, such cells tend to show chromosomes that have fused together. Propose an explanation for the formation of the chromosomes.
- Part 2 Cytosine can be deaminated to form Uracil When U is replicated in two rounds of synthesis, what substitution does this result in? Before Uracil alters the DNA during replication, what repair system can be used to correct this error? Describe how this type of DNA repair worksRecombination of tole players and their involvement in various cancersBecause DNA polymerase cannot copy the 5′ ends oflinear DNA molecules, chromosomes will shorten everytime they are replicated, leading to_______ loss and celldeath.?