MMSC 490 Exam Questions and Correct Answers

MMSC 490 Exam Questions and Correct Answers The feature that most clearly distinguishes eukaryotes from prokaryotes is the presence of .......... in eukaryotic cells. - Answer-a nucleus Cytoplasmic organelles are - Answer-absent in prokaryotic cells and present in eukaryotic cells The eukaryotic nucleus contains .......... DNA molecule(s). - Answer-multiple linear Stanley Miller applied electric sparks to a reducing atmosphere of methane, ammonia, water, and hydrogen, and the resulting products showed that under these conditions, - Answer-amino acids can form Which energy-producing process is thought to have come first during cellular evolution? - Answer-glycolysis At the time life arose on Earth, Earth's atmosphere contained abundant amounts of all of the following except - Answer-O2 CO2 to organic compounds radically changed Earth by producing - Answer-O2 RNA is believed to have been the initial genetic system because it can - Answercatalyze the polymerization of nucleotides into another RNA strand. The initial importance of a membrane enclosing self-replicating RNA molecules and associated proteins was that it - Answer-maintained these molecules as a unit capable of reproduction and evolution.