lilcet anu study guide. Throw away the test. 1. Life forms on early Earth as com
ID: 210173 • Letter: L
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lilcet anu study guide. Throw away the test. 1. Life forms on early Earth as compared to these days: a. Couldn't use oxygen b. Used oxygen about the same as today c. Used more oxygen as compared to today d. None of the above 2. Which is NOT one of the four hypothetical stages for cell creation? a. Formation of organic molecules b. Invention of DNA c. Organic molecules forming polymers d. Genetic material was surrounded inside a membrane . Stanley Miller performed an experiment trying to find out if a. RNA came before DNA b. Prokaryotes are older than Eukaryotes c. Viruses are alive or not d. Whether the atmosphere of the early Earth could've generated organic mExplanation / Answer
1. Option a is the correct answer. Early earth had no oxygen. Photoynthetic bacteria first produced the oxygen as a waste product.
2. Option B is the correct answer. First of all formation of organic molecule was occured which later on polymerized to give macromolecule (like DNA, RNA and protein) and then enclosure of self reolicating RNA in phospholipid membrane occured.
3. Option D is the correct answer. Stanley Miller performed anexperiment in which they passed an electrical charge through a flask of a chemical solution of methane, ammonia, hydrogen and water. This resulted in formation of organic compounds.
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