Chromosomes are a DNA molecule, that cannot be seen underneath a microscope. However, the DNA in chromosomes become pushed together during cell division, which then allows scientists to see its material under a microscope.
Answer:
(E) None of the above
Explanation:
All of the answers contribute to the high fidelity of DNA synthesis.
Accuracy of the DNA replication is achieved thanks to various mechanisms such as:
- DNA polymerase activity (high processivity)-ability of the enzyme to copy long stretches of DNA
- DNA polymerase proofreading-ability to recognize its own mistakes and fix them
- Cell's surveillance-cell monitors its DNA status, checks for the damage
- Mismatch Repair-cell contain repair machinery which recognizes DNA helix deformities, removes and replaces the portion containing the mismatch etc.
Answer:
Almost all of the cells in your body share the same DNA as was found in that first cell*. For a cell to work, 1000's of these proteins must be made, each doing its particular job. Eyes and lungs are so different because different sets of proteins are made in the various eye and lung cells.
