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Ch. 14 - Translation and Proteins
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All textbooksKlug 12th EditionCh. 14 - Translation and ProteinsProblem 1

Chapter 14, Problem 1

In this chapter, we focused on the genetic code and the transcription of genetic information stored in DNA into complementary RNA molecules. Along the way, we found many opportunities to consider the methods and reasoning by which much of this information was acquired. From the explanations given in the chapter, what answers would you propose to the following fundamental questions: Why did geneticists believe, even before direct experimental evidence was obtained, that the genetic code would turn out to be composed of triplet sequences and be nonoverlapping? Experimentally, how were these suppositions shown to be correct?

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Welcome back everyone. Let's look at our next question. It says A genetic code is a combination of three nucleotides. What is the total number of genetic codes that will specify the 20 amino acids? Well, we can calculate how many we've got by the little simple equation. The number of code owns is equal to the number of bases raised to the power of the number of base pairs per code on. So we have Four bases total and we have three base pairs per code on. So four to the third power four cubed, which is equal to 64. So we have 64 possible code ons. However, 64 is not going to be our answer because our question says, what is the total number that was specified 20 amino acids. And if we look at a chart of our code owns it up very quickly. Not every single code on specifies an amino acid. The exception being those stop codes are stop code ons. And if we look at our chart here, we've got two here And one here. So there's a total of three stop code ons that do not specify an amino acid. So we need to say 64 total. Co Din's -3. Stop code ons. So that's going to give us 61 that specify amino acids. So our answer choice will not be 64. It's not gonna be one or three either. It's going to be choice C 61. When we're talking about the number that specified amino acid. See you in the next video
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Textbook Question

In this chapter, we focused on the translation of mRNA into proteins as well as on protein structure and function. Along the way, we found many opportunities to consider the methods and reasoning by which much of this information was acquired. From the explanations in the chapter, what answers would you propose to the following fundamental questions:

What experimentally derived information led to Holley's proposal of the two-dimensional cloverleaf model of tRNA?

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Textbook Question
In this chapter, we focused on the translation of mRNA into proteins as well as on protein structure and function. Along the way, we found many opportunities to consider the methods and reasoning by which much of this information was acquired. From the explanations in the chapter, what answers would you propose to the following fundamental questions: How do we know that the structure of a protein is intimately related to the function of that protein?
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Textbook Question
In this chapter, we focused on the genetic code and the transcription of genetic information stored in DNA into complementary RNA molecules. Along the way, we found many opportunities to consider the methods and reasoning by which much of this information was acquired. From the explanations given in the chapter, what answers would you propose to the following fundamental questions: What experimental evidence provided the initial insights into the compositions of codons encoding specific amino acids?
372
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Textbook Question
In this chapter, we focused on the genetic code and the transcription of genetic information stored in DNA into complementary RNA molecules. Along the way, we found many opportunities to consider the methods and reasoning by which much of this information was acquired. From the explanations given in the chapter, what answers would you propose to the following fundamental questions: How were the specific sequences of triplet codes determined experimentally?
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Textbook Question
In this chapter, we focused on the genetic code and the transcription of genetic information stored in DNA into complementary RNA molecules. Along the way, we found many opportunities to consider the methods and reasoning by which much of this information was acquired. From the explanations given in the chapter, what answers would you propose to the following fundamental questions: How were the experimentally derived triplet codon assignments verified in studies using bacteriophage MS2?
268
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