Given the table, which of the following amino acid sequences is coded by UCA, UGG, UCU, and GUA?
A. Serine, Threonine, Arginine, Aspartic Acid
B. Serine, Tryptophan, Serine, Valine
C. Aspartic Acid, Valine, Leucine, Asparagine
D. Leucine, Histidine, Glutamic Acid, Leucine
Answer (2)
The codons UCA, UGG, UCU, and GUA correspond to the amino acids Serine, Tryptophan, Serine, and Valine, respectively. Therefore, the correct choice is Option B, which lists these amino acids. The other options do not align with the provided codons.
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The problem involves identifying the amino acids coded by specific RNA codons using a provided table. By looking up the codons for Serine, Threonine, Arginine, and Aspartic Acid in the table, we can determine that the correct answer is the option that lists these amino acids in the correct order. The correct option is A.
Explanation
Analyze the problem and data The question provides a table that maps RNA codons to amino acids. The table is organized with the first base (U, C, A, G) on the left, the last base (U, C, A, G) on the right, and the middle base (U, C, A, G) across the top. The question asks to identify the amino acids that correspond to the following codons: Serine, Threonine, Arginine, and Aspartic Acid.
Objective We need to find the codons for Serine, Threonine, Arginine, and Aspartic Acid from the table and match them to the correct option.
Find the codons for each amino acid
Serine: Looking at the table, Serine (Ser) is coded by the following codons: UCU, UCC, UCA, UCG, AGU, and AGC.
Threonine: Threonine (Thr) is coded by: ACU, ACC, ACA, and ACG.
Arginine: Arginine (Arg) is coded by: CGU, CGC, CGA, CGG, AGA, and AGG.
Aspartic Acid: Aspartic Acid (Asp) is coded by: GAU and GAC.
Evaluate the options Now, let's examine the options:
Option A: Serine, Threonine, Arginine, Aspartic Acid. This option lists the amino acids we are looking for.
Option B: Serine, Tryptophan, Serine, Valine. This option is incorrect because it doesn't contain Threonine, Arginine, and Aspartic Acid.
Option C: Aspartic Acid, Valine, Leucine, Asparagine. This option is incorrect because it doesn't contain Serine, Threonine, and Arginine.
Option D: Leucine, Histidine, Glutamic Acid, Leucine. This option is incorrect because it doesn't contain Serine, Threonine, Arginine, and Aspartic Acid.
Since Option A lists the amino acids we are looking for, we need to check if the order is correct based on the table.
Final Answer and Conclusion The question asks for the amino acids corresponding to Serine, Threonine, Arginine, and Aspartic Acid. Option A lists these amino acids in the correct order. Therefore, Option A is the correct answer.
Examples
Understanding how codons map to amino acids is crucial in genetics and molecular biology. For example, when scientists are trying to understand the effect of a mutation in a gene, they need to know how the change in the DNA sequence will affect the protein that the gene codes for. This involves translating the DNA sequence into an RNA sequence, and then using the codon table to determine the amino acid sequence of the protein. This information can then be used to predict how the mutation will affect the protein's function.
