BIOL 101 Lecture Notes - Lecture 7: Francis Crick, Dna Replication, Pyrimidine
Document Summary
Dna = universal code for all life on earth. Dna: instructions for an organism: body, growth, passed parent offspring, 23 human chromosome pairs. Molecular biology: investigation of life at the level of individual molecules, dna. James watson and francis crick: discovered chemical structure of dna in 1953, new era in biology, elucidate fundamental processes in genetics. Nucleotide: 3 parts: sugar - backbone, phosphate - backbone, nitrogenous base base. Genome = complete set of dna in an organism. Chromosome = unique linear nucleic acids (dna) [humans have 23 pairs] Genes are sections of dna base code. This code is translated into a protein. Alleles = alternate versions of a gene: code for same trait. Genotype (alleles organism has) & phenotype (physical manifestations of allelic interactions) Dna replication each strand is template for synthesis of a new, complementary strand: semi-conservative (one new strand, one old strand)
