1. Sections of DNA within a gene that do not encode part of the protein that the gene produces are called :   intein   Transposons   Exons   Introns   Hint Half-n-half Clue   2. An RNA molecule that can catalyze either its own cleavage (self-splicing) or the cleavage of other RNA molecules is :   An inducer   A spliceosome   A chaperone enzyme.   A ribozyme   Half-n-half Clue   3. A collection of genes including one which acts as a switch that governs the expression of the structural genes in the collection is called :   An Operon   lac operon   A regulon   Does everything have to have a name ? ? ! !   Half-n-half Clue   4. Proteins that bind between the promotor region and the section of the gene which is transcribed thus blocking transcription (preventing gene expression) are called :   inducer   Activators   Repressors   Operator   Half-n-half Clue   5. A guanine triphosphate nucleotide that binds to the 5' end of the mRNA thus increasing the stability of the synthesized RNA and enhancing translation efficiency is called a :   poly-A-tail   Cap   trailer   leader   Half-n-half Clue   6. The bacterial promotor sequence usually found at the -10 position (ten base pairs upstream of the transcription start site) is :   TATTAT   TAGACA   TTGACA   TATAAT   Half-n-half Clue   7. A base sequence that is part of the DNA of an organism and appears to have once coded a gene product, such as a protein or transcription factor but no longer does so is called :   A jumping gene   An Oncogene   A selfish gene   A pseudogene   Half-n-half Clue