BMS 300 Final (Exam questions with 100% correct answers)

C correct answers Between the time when pre mRNA is generated and when introns are removed from it, a type of RNA called SnoRNA adds a methyl group to some bases in the pre mRNA. From what you know about RNA Processing, you would expect these enzymes to function in the: a. smooth ER b. rough ER c. nucleus d. cytoplasm e. a and b are correct A correct answers The name for cadherins is derived from the observation that extracellular Ca2+ is needed for cells to adhere tightly to one another. This protein is an essential part of: a. desmosomes b. gap junctions c. tight junctions d. hemidesmosomes e. a and d are correct B correct answers In the lipid mosaic model of the membrane, _____ normally form the ion channels. a. amphipathic phosphate head groups b. alpha helices c. beta-sheets d. phospholipids e. triglycerides D correct answers Which of the following would you expect to find in eukaryotes and not in prokaryotes? a. DNA polymerase b. ribosomes c. RNA polymerase d. a membrane bound compartment for oxidative phosphorylation e. tRNA E correct answers An experiment is performed where a sequence of bases that encodes for a signal peptide is added to an mRNA than normally encodes for keratin. You would expect the protein synthesized from the modified mRNA to be found in: a. the nucleus b. Golgi apparatus