BIOL 100 Lecture Notes - Lecture 10: Fetus, G0 Phase, Centromere
Document Summary
Cell division has a role in growth, reproduction, and development. Uv causes adjacent thymine or cytosine to bind deforms dna, leads to skin cancer. Uv degrades folic acid which is needed for synthesis and repair. Apoptosis- programmed cell death, carves out distinctive structures and weeds out aging or defective cells. For each of the daughter cells to have an identical dna the cell replicate genome i. ii. iii. iv. v. Chromosome- single strand of dna with thousands of genes. Genome collection of genetic information (dna) in a cell. Dna replication occurs in many steps i. ii. Both sides are replicated from 3" end of the new strand. Dna polymerase- (enzyme) adds new nucleotides and proofreads as it goes but mistakes still happen (mutation) iii. After replication, each dna molecule has one parental strand and one daughter strand. Dna replication begins simultaneously at multiple origins of replication- division of labor i.
