2 multiple choice dna genetics questions

Which statement(s) about the trp operon in E. coli is correct?
   
A) It is an example of transcriptional regulation   
B) An inducer binds to a repressor molecule and activates transcription   
C) A corepressor binds to a repressor molecule and stops transcription   
D) Lactose binds directly to the operator and activates it   
E) Both a) and b) are correct    
F) Both c) and d) are incorrect

Which of the following statements concerning protein synthesis is NOT true?
   
A) proteins are assembled with the help of ribosomes
B) tRNAs carry amino acids to the ribosome-mRNA complex
C) ribosomes attach to the mRNA
D) the mRNA contains the anticodons
E) a part of the information on the DNA is transcribed into mRNA