about chromosomes...match each item to the correct description or definition. Al
ID: 182933 • Letter: A
Question
about chromosomes...match each item to the correct description or definition. All A. DNA in the middle of a . telomere chromosome, where the spindle attaches in mitosis B. chromatin C. D. switches DNA back and forth - centromere kinetochore of the eukaryotic cell regulatory DNA cycle when chromosomes pack tightly enough to visualize under the microscope between euchromatin and heterochromatin E proteins that bind DNA in the middle of chromosomes DNA never exists in this F G naked DNA H. heterochromatin euchromatin form inside a cell DNA that is packaged too tightly for gene expression to take place the process of winding chromatin into chromosomes DNA that controls gene expression but is never J interphase transcribed into RNA K. DNA at the end of chromosomes L. mitosis QUESTION 43 2 points Save Ans Complementary strands of DNA are held together through Phosphodiester bonds O Nonpolar bonds Hydrogen bonds HistonesExplanation / Answer
Telomere - K - A telomere is a DNA with repetitive nucleotide sequences at each end of a chromosome. It protects the end of the chromosome from deterioration and from fusing with the neighboring chromosomes. Centromere - A - A centromere is the DNA in the middle region of a chromosome to which the microtubules of the spindle attach. It is the part of a that links a pair of sister chromatids. Kinetochore - E - The microtubules of the spindle attach to the centromere via the kinetochore. It is a protein structure that helps hold the sister chromatids together and also play a role in chromosome editing. Part of the eukaryotic cell cycle when chromosomes pack tightly enough to visualize under the microscope - L - During prophase of mitosis, the chromosomes inside the nucleus of a cell condenses and forms tight structures. They appear as curvy, dark lines when viewed under a microscope . DNA never exists in this form inside a cell - G - Naked DNA is a DNA that is not associated with proteins, lipids, or any other molecule. In transformation, gene transfer is accomplished by the uptake of naked DNA. DNA that is tightly packaged too tightly for gene expression to take place - H - Heterochromatin is a form of chromatin that is found in the nucleus of eukaryotic cells, which is densely packed whereas the euchromatin is lightly packed. In heterochromatin the activity of the genes is modified or suppressed. DNA that controls gene expression but is never transcribed into RNA - C - A regulatory DNA is capable of increasing or decreasing the expression of specific genes within an organism and it is never transcribed to RNA.
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