Retired NBME Answer Explanations

Second Aid\biochemistry\molecular

\Chromatin structure
\Nucleotides
\De novo pyrimidine and purine synthesis
\Orotic aciduria
\Purine salvage deficiencies
\Genetic code features
\Mutations in DNA
\DNA replication
\DNA repair
\DNA/RNA/protein synthesis direction
\Types of RNA
\Start and stop codons
\Functional organization of the gene
\Regulation of gene expression
\RNA polymerases
\RNA processing (eukaryotes)
\Splicing of pre-mRNA
\Lac operon
\Introns vs. exons
\tRNA
\tRNA wobble
\Protein synthesis
\Posttranslational modifications