BIOC 385 exam 4 (100% Correct Answers)

An experiment with bacteria that has been exposed to an antibiotic reveals that the translocation step has been inhibited. Which antibiotic was likely used? correct answers none of these answers are correct. The correct mRNA secondary structure of transcriptional termination is __________ stem-loop structure. correct answers 3-4 In negative autoregulation, correct answers proteins repress their own gene expression. Which sequence is MOST likely to be prenylated in the ER? (The ... represents additional amino acids N-terminal to those shown.) correct answers ...Leu-Phe-Leu-Cys-Ile-Phe What kind of control mechanism is ligand-induced binding of an activator protein? correct answers positive Producing an iPS cell is remarkable because the pathway correct answers for conversion is general, not specific. Which of the following best describes how trans- and cis-acting factors operate? correct answers Trans-acting factors can bind to specific DNA sequences whereas cis-acting sites are DNA sequences. When trp operon is attenuated, what does that mean for the trp operon? correct answers disruption of transcriptional elongation by RNA polymerase When lactose levels in the environment are low, transcription of the lac operon correct answers decreases. What function do HAT and HDAC perform in the chromatin-modifying process? correct answers HAT activates the gene and HDAC represses the gene. An experimental prep is able to separate the following membrane fractions: nuclear membrane, Golgi apparatus membrane, transport vesicle membrane, and mitochondrial membrane. The membrane fractions can then be analyzed via Western blotting for the presence of specific proteins. Which fraction would indicate the presence of t-SNAREs? correct answers Golgi apparatus membrane What explains the observation that a single eukaryotic protein coding gene can give rise to multiple different proteins, i.e., why are there only ~25,000 human genes in the genome, but ~150,000 different proteins in the human "proteome?" Choose the TWO best correct answers. correct answers - mRNA transcripts from the same gene can be deferentially spliced to include/exclude exons. -Genes can contain more than one polyadenylation site, which alters the 3' of the mRNA transcript and the inclusion/exclusion of exons.