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Where in a eukaryotic cell would you find the DNA?
nucleus
The nucleus is particularly important among eukaryotic organelles because it is the location of a cell’s DNA.
What happens to the structure of DNA during mitosis?
During mitosis, a eukaryotic cell undergoes a carefully coordinated nuclear division that results in the formation of two genetically identical daughter cells. Then, at a critical point during interphase (called the S phase), the cell duplicates its chromosomes and ensures its systems are ready for cell division.
How do eukaryotic cells reproduce?
Unicellular eukaryotes reproduce sexually or asexually. Asexual reproduction in single-celled eukaryotes involves mitosis, i.e., duplication of chromosomes and cytoplasm to produce “twin cells” in the process of cell division (Figure 2.16). Mitosis divides the chromosomes in a cell nucleus.
What is the state of DNA when it is scattered throughout the nucleus?
Euchromatin and Heterochromatin. The DNA in the nucleus exists in two forms that reflect the level of activity of the cell. Heterochromatin appears as small, darkly staining, irregular particles scattered throughout the nucleus or accumulated adjacent to the nuclear envelope.
Where and in what form is eukaryotic DNA found?
Eukaryotic chromosomes are found in the cell’s nucleus. The DNA inside the nucleus is organized into chromosomes. At the most basic level, a chromosome is a molecule of DNA that is tightly coiled around proteins called histones. Eukaryotic cells have multiple chromosomes that are linear in shape.
When eukaryotic cells divide what happens next after the DNA replicates?
When eukaryotic cells divide, after DNA replication is over, the cell enters into the G2 phase where it starts to prepare for the mitotic phase. Explanation: Mitosis is the process of cell division. This is initiated by the dissolution of the nuclear membrane and the formation of spindle fibres.
How does the DNA change during meiosis?
Recombination in meiosis. One of the most notable examples of recombination takes place during meiosis (specifically, during prophase I), when homologous chromosomes line up in pairs and swap segments of DNA. …
What structure distinguishes eukaryotes from prokaryotes?
The primary distinction between these two types of organisms is that eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not. The nucleus is where eukaryotes store their genetic information.
How does DNA get into new cells?
During DNA replication, DNA unwinds so it can be copied. At other times in the cell cycle, DNA also unwinds so that its instructions can be used to make proteins and for other biological processes. But during cell division, DNA is in its compact chromosome form to enable transfer to new cells.
Which two of the following phases make up the entire eukaryotic cell cycle?
In eukaryotic cells, or cells with a nucleus, the stages of the cell cycle are divided into two major phases: interphase and the mitotic (M) phase.
What are the specialized DNA sequences that are at the ends of most eukaryotic chromosomes called?
To prevent the loss of genes as chromosome ends wear down, the tips of eukaryotic chromosomes have specialized DNA “caps” called telomeres. Telomeres consist of hundreds or thousands of repeats of the same short DNA sequence, which varies between organisms but is 5′-TTAGGG-3′ in humans and other mammals.