[HSCI 100] - Final Exam Guide - Everything you need to know! (34 pages long)

• School: Simon Fraser University
• Department: Health Sciences
• Course: HSCI 100
• Professor: Nienke Van Houten

Document Summary

An enzyme unwinds the 2 strands (break the h bonds) Replication is semiconservative (two parent strands, make new strands) Result with two strands from the original one. Step two: both parental strands serve as templates for new strands. Step three: nucleotides link to complementary bases on each dna strand. Step four: two identical molecules of dna result, each composed of one parental strand and one new strand. 3 bases= one amino acid called a codon". Translation- involves ribosomes (ex)ons are (ex)pressed into proteins and introns are removed. Rna polymerase synthesizes mrna using dna as template. Mrna nucleotides are being joined by the enzyme rna polymerase so that their sequence is complementary to a strand of dna. Mrna is processed before leaving the nucleus. Enzymes splice together exons to make modified mrna molecule. Termination- protein synthesis stops initiation - major players in protein synthesis come together (mrna, trna, and ribosomal subunits)