oplication is described as being semi-conservative. What does this mean? (your a

Question

oplication is described as being semi-conservative. What does this mean? (your answer should include the meaning of the term "conserved") DNA Conformations The structure of DNA is a double stranded helix. DNA has protein clusters called associated with it. The DNA winds around a cluster of histones to form a structure called a--weeoma - _ which can make the DNA strand appear segmented or resemble "beads on a string.(examine parts 2-4 in figure 44) DNA and its associated histones can exist in one of two different conformations (structures) depending on whether or not a cell is undergoing mitosis (cell division). When a cell is not undergoing mitosis (cell division), the DNA is in the conformation known as on string" appearance, and cannot be seen with the light microscope. However, as a cell prepares to divide, the DNA becomes compacted into the conformation called a which is loosely organized, often described as a "bead and can be seen with the light microscope. (examine part 6in figure 4.4) In preparation for mitosis (cell division) the DNA must replicate. When the DNA in a chromosome has been replicated, it resembles an"X" like structure (examine figure 4.5 and the figure on the next page of this handout). The for the center region of a chromosome. There is a specific protein region on each side is the term which aids in separating the chromosomes in mitosis (cell division)

Explanation / Answer

Ans.

1. Histones

2. Nucleosome

3. Elongated conformation

4. Compact conformation

5. Centromere

6. Kinetochore

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