Meselson and Stahl performed thedensity-gradient centrifugation of DNA in a solution of calciumchloride.
a. True
b. False
BIOL 110 Study Guide - Midterm Guide: Point Mutation, Heterochromatin, Euchromatin
Document Summary
Components of nucleotide structure: phosphate group, deoxyribose sugar, nitrogenous base i. ii. iii. iv. Complementary base pairing: a t, g c. Can only add to an existing nucleotide strand. Date: / / : ssbp prevents strands from reattaching, topoisomerase stabilizes molecule, primase makes short rna primer (3-6 nucleotides, dna polymerase begins adding to 3" end. Same as leading strand: primase makes primers, dna polymerase adds to 3" end (pairing in opposite direction, Nucleosomes, or beads on a string (10-nm fiber) Chromatin that remains highly compacted during interphase and is not transcribed. Central dogma of gene expression: dna rna protein. Sequence of 3 nucleotides in mrna that corresponds to an amino acid. Synthesis of an rna molecule from a gene (nucleotide sequence) within. Enzyme responsible for the synthesis of rna. Messenger rna; transcribed from dna; directs assembly of amino acids. Transfer rna; responsible for matching the appropriate amino trna acid with the correct mrna sequence.
