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MMSC 490 Exam Questions with Verified & Updated solutions
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MMSC 490 Exam Questions with Verified & Updated solutions The feature that most clearly distinguishes eukaryotes from prokaryotes is the presence of .......... in eukaryotic cells. RNA Molecules Ribosomes Oxidative phosphorylation Nucleus - Answer️️ -Nucleus Cytoplasmic organelles are......

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  • May 1, 2024
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  • 2023/2024
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MMSC 490 Exam Questions with Verified & Updated solutions The feature that most clearly distinguishes eukaryotes from prokaryotes is the presence of .......... in eukaryotic cells. RNA Molecules Ribosomes Oxidative phosphorylation Nucleus - Answer✔️✔️-Nucleus Cytoplasmic organelles are... Present in prokaryoti c cells an absent in eukaryotic cells Absent in prokaryotic cells and present in eukaryotic cells Absent in both prokaryotes and eukaryotes Present in both prokaryotic and eukaryotic cells - Answer✔️✔️-absent in prokaryotic cells and present in eukaryotic cells The eukaryotic nucleus contains .......... DNA molecule(s). Multiple linear A single circular A single linear Multiple circular - 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 Amino acids can polymerize into polypeptides Nucleotides can form Nucleotides can polymerize into nucleic acids Amino acids can form - Answer✔️✔️-Amino acids can form Which energy producing process is thought to have come first during cellular evolution? Proteolysis Photosynthesis Oxidative phosphorylation Glycolysos - Answer✔️✔️-Glycolysis At the time life arose on Earth, Earth's atmosphere contained abundant amounts of all of the following except N2 H2 H2S O2 - Answer✔️✔️-O2 CO2 to organic compounds radically changed Earth by producing O2 Sugar H2 Cellulose - Answer✔️✔️-O2 RNA is believed to have been the initial genetic system because it can form ribosomes catalyze the polymerization of nucleotides into another RNA strand transfer amino acids to ribosomes form a stable double helix with a complementary nucleic acid strand - Answer✔️✔️-catalyze the polymerization of nucleotides into another RNA strand The initia l importance of a membrane enclosing self -replicating RNA molecules and associated proteins was that it kept other molecules out of the compartment maintained these molecules as a unit capable of reproduction and evolution transported materials in and out of the compartment provided sites for proteins to function - Answer✔️✔️-maintained these molecules as a unit capable of reproduction and evolution the bacterial genome is located in a portion of the cell called the nucleu s nucleoid nucleolus mesosome - Answer✔️✔️-nucleoid eukaryotic cell nuclei contain genes that are primarily of bacterial origin primarily of archaebacterial origin all of eukaryotic origin partly archaebacterial and partly bacterial in origin - Answer✔️✔️-partly archaebacterial and partly bacterial in origin Organelles such as mitochondria and chloroplasts are thought to have originated in eukaryotic cells via a process called phagocytosis endosymbiosis endocytosis exocytosis - Answer✔️✔️-endosymbiosis Mitochondria and chloroplasts resemble bacteria in that they reproduce the simple division into two have their own ribosomes have their own DNA all of the above - Answer✔️✔️-all of the above Which of the following is a colonial organism closely related to the evolutionary precursors of present -day plants?

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