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Ch.3 - Protein Structure and Function

Chapter 3, Problem 7

Why are proteins not considered to be a good candidate for the first living molecule? a. Their catalytic capability is not sufficient for most biological reactions. b. Their amino acid monomers were not likely present in the prebiotic soup. c. They cannot serve as a template for replication. d. They could not have polymerized from amino acid monomers under early Earth conditions.

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Hello everyone and welcome to today's video. So which of the following statements about proteins is incorrect as we go over answer choices. Remember that we're looking for the answer choice. That represents an incorrect statement regarding proteins. Let's begin by answer choice. They're made up of amino acid monomers. Well, as it turns out, several amino assets that are joined together are going to form a protein. These amino assets are considered to be monomers while the protein itself is considered to be a polymer. Since it is made up of these amino assets because of this, this is a correct statement and we're going to cancel it out because we're looking for the incorrect one. Moving on, we have answer choice C peptide bonds linked to amino acids together in a poly peptide chain. While this link that we're seeing here linking these two amino acids together is actually called a peptide bond. Because of this. This answer choice is also correct and we're going to cancel it out. Then we have answer choice. Each protein has a unique sequence of amino assets. Well, as it turns out, each protein has a specific function that is usually different from other proteins. And in order to specify the function of each protein. A protein is going to differ from others in their sequence of the amino assets which is going to affect its structure because of this answer choice D. Is also correct and we're going to cancel it out. Moving on, we have be finally they have the ability to replicate. Well in order to make proteins. We need many things. We need D. N. A. We need R. N. A. And many other things that are going to code for these proteins. Proteins themselves really don't have the ability to replicate because of this. This is an incorrect answer choice, and we're going to highlight it as the final answer to our question. I really hope this video helped you and I really hope to see you on the next one.