JMU Bio 140 Final Review Questions and Answers

JMU Bio 140 Final Review Questions and Answers (Verified Answers) 1.The negatively charged components of atoms are referred to as✅✅ electrons 2.A young girl is staring at the raindrops running down her window. She notices that the raindrops remain more or less intact, even as they cascade down the windowpane. This is a result of✅✅ hydrogen bonds between water molecules 3.With 4 distinct nucleotides, how many combinations are possible in a sequence of 6 nucleotides✅✅ 4096 4.Amino acids can be spontaneously generated in vitro (in a laboratory), but only✅✅ under anaerobic conditions 5.Central Dogma✅✅ DNA -> RNA -> Protein 1 / 2

6.Frederick Griffith✅✅ He demonstrated that some unknown substance can trans- form a nonvirulent strain of bacteria to a virulent one 7.Promoters of many genes have mostly adenines and thymines. What is the most likely reason for this high proportion of adenines and thymines?✅✅ This is the region where template and nontemplate strands separate, and A-T base pairs require less energy to separate than G-C base pairs 8.The interior region of a phospholipid bilayer is characterized as✅✅ hydropho- bic 9.Which part of a cholesterol molecule is polar?✅✅ OH group (hydroxyl) 10.The movement of water across a cell plasma membrane into or out of a cell is an example of✅✅ both osmosis and diffusion 11.In which eukaryotic organelle are various macromolecules broken down and destroyed?✅✅ lysosome