Some of the common acronyms used in Molecular Biology which you need to be familiar from the examination point of view

AP - apurinic or apyrimidinic condition

BER - base excision repair

EES - ethyl ethane sulfonate 

EMS - ethyl methane sulfonate

MMS - methyl methane sulfonate

NER - nucleotide excision repair 

ORF - Open reading frame

PIC - Transcription (Pre) initiation complex 

rRNA - ribosomal RNA

tRNA - transfer RNA

SSBP - Single strand binding protein 

URE - Upstream Regulatory Elements