BIOL 250 Final Exam Questions with 100% Correct Answers

What types of biological molecules replicate DNA? Correct Answer proteins What processes occur during interphase? Correct Answer DNA replication Organelle replication RNA synthesis Protein synthesis Is DNA, RNA, or both produced by DNA polymerase? Correct Answer DNA You observe that Gene X is highly expressed in neurons but is not expressed in intestinal cells. If you could assess the chromatin surrounding Gene X in both cell types, what would expect to observe? Correct Answer high levels of DNA methylation in intestinal cells Which of the following mutations would most likely disrupt the nuclear localization of a protein? Normal: Pro - Pro - Lys - Lys - Lys - Arg - Lys - Val Correct Answer pro-pro-asp-lys-lys-arg-lys-val Only _____ contains ribose Correct Answer RNA Molecules are made of ________ that are attached by chemical bonds formed by sharing, gaining, or losing _________. Correct Answer isotopes / electrons How is M-phase rapidly triggered by M-Cdks? Correct Answer M-cyclin/cdk complex is held inactive by phosphorylation and is rapidly activated by Cdc25 Protein domains are sequences of amino acids that are similar in many different proteins and lead to different proteins that are made of similar 'parts'. What is the most likely explanation for the evolution of protein domains? Correct Answer exons are shuffled to new genes Rna in cells differs from DNA in that _____________ Correct Answer it is single-stranded and can fold into a variety of structures Where would you predict a protein to be localized if it has a chain of hydrophobic amino acids at the N-terminus? Correct Answer ER Which of the following amino acids would you expect to find on the surface of a protein? Correct Answer serine What are the steps of protein transport across the ER? Correct Answer 1 - begins in cytosol 2 - ER signal binds to SRP (stalls)