BIO 202 Arizona State University -uncw bio 202 exam 1 questions with complete solutions

BIO 202 Arizona State University -uncw bio 202 exam 1 questions with complete solutionsWhat are the stages of how life got started? - correct answer 1. Nucleotides & amino acids were produced prior to the existence of cells. 2. Organic polymers may have formed on the surface of clay 3. Cell-like structures may have originated when polymers were enclosed by a boundary 4. Polymers enclosed in membranes acquired cellular properties What are the 3 hypotheses on how nucleotides and amino acids were produced prior to the existence of cells? - correct answer 1. Reducing Atmosphere Hypothesis 2. Extraterrestrial Hypothesis 3. Deep-sea Vent Hypothesis What is a protobiont? - correct answer A self organized, spherical collection of lipids (natural oils, waxes, and steroids) What are the 4 characteristics of a protobiont? - correct answer 1. Membrane separating internal contents from environment 2. Internal polymers contain info (RNA) 3. Polymers with some kind of metabolism 4. Ability to self replicate RNA: 1st macromolecule in protobionts characteristics - correct answer -can store info in nucleotides -self replicate -catalyze chemical reactions -combines properties otherwise found in DNA and proteins Precambrian Eons: - correct answer Hadean, Archaean, Proterozoic