CH 14 MCAT

CH 14 MCAT - CH. 14 In eukaryotic cells, transcription and...

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CH. 14 In eukaryotic cells, transcription and translation are separated: Translation occurs in the cytoplasm, and transcription occurs in the nucleus. If it were stretched out, the DNA from a human cell would be 2 m in length. Human cells have approximately 1,000 times the DNA found in prokaryotic cells. The phrase “beads on a string” describes the structural appearance of nucleosomes. Cancer cells are often found to have abnormally high amounts of telomerase. Telomerase is important to eukaryotic cells because telomeres tend to get shortened with each cell division. Each human chromosome must have a centromeric sequence, telomeric sequences, and an origin of replication. RNA synthesis in eukaryotes occurs primarily in the nucleus. RNA translation in eukaryotes occurs solely in the cytoplasm. Genomics is the study involved with assigning functions to DNA sequences. DNA sequences found in introns provide no known useful info. A gene family is a set of genes that over time has changed slightly, extensively, or not at
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CH 14 MCAT - CH. 14 In eukaryotic cells, transcription and...

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