BIO152H5 Final: Final Exam: Key Definitions
Document Summary
These were taken from previous bio152 midterms/exams and from the final exam review! Antiparallel dna strands one strand runs 5" to 3" and the other strand runs 3" to 5" Dna polymerase catalyze elongation of new dna by adding nucleotides at the end of the 3" chain. Dna polymerase iii synthesizes leading strand (first) Dna polymerase i replaces rna with dna (second) Helicase untwists dna"s double helix at replication forks and separates strands. Ligase catalyzes bonding of 2 large molecules (3" end of okazaki fragments to 5" end of growing dna chain) Primase joins rna nucleotides to make a primer during dna replication, using parental dna strand as a template. Topoisomerase breaks down, swivels, and rejoins dna strands during replication, relieves strain on double helix. Ribosome a complex of rna and protein molecules, the site of protein synthesis in the cytoplasm, two subunits. Exons sequence that remains in rna transcript after processing, region of dna from which sequence transcribed.
