Microbial Genetics

RNA polymerase binds to the

• start codon

• promoter sequence

• regulation sequence

• termination sequence

A sequence of bases within a gene that will be transcribed, but removed from the transcript prior to translation is a/an

• promotor

• exon

• intron

• operon

Helicase

• winds RNA

• unwinds DNA

• supercoils DNA

• unwinds RNA

Genes that jump from one location to another in the genome are

• repressors

• transformers

• operons

• transposons

The non-transcribed region of DNA to which RNA polymerase binds to initiate transcription is called the

• operator

• exon

• promotor

• operon

What molecule is synthesized as a copy of a gene from the DNA template strand?

• primer RNA

• transfer RNA

• ribosomal RNA

• messenger RNA

A screening system called the _____ test is used for detecting chemicals with carcinogenic potential.

• mutation

• Ames

• Iowa

• Koch

Which of the following antibiotics affect protein synthesis?

• chloramphenicol

• tetracycline

• penicillin

• both chloramphenicol and tetracycline

A nucleosome is a linear chromosome wound around the

• mRNA

• rRNA

• histone

• nucleolus

Which of the following is not a type of bacterial DNA recombination?

• transformation

• transduction

• mitosis

• conjugation