The codon and anticodon are base-paired together during the process of translation. Which of the following is correct regarding the relationship between anticodon and codon?
A.
The tRNA anticodon UCU pairs with the AGA mRNA codon.
B.
The tRNA anticodon is read from the 5’ to the 3’ end.
C.
A tRNA anticodon can pair with only one mRNA codon.
D.
The mRNA codon ACG base pairs with the tRNA anticodon TGC.
C. A tRNA anticodon can pair with only one mRNA codon.
To determine the correct answer, we need to understand the relationship between the anticodon and codon during translation.
During translation, tRNA molecules bring the corresponding amino acids to the ribosome, where the amino acids are linked together to form a protein. Each tRNA molecule has an anticodon, which is a sequence of three nucleotides that is complementary to the codon on the mRNA.
Now, let's go through each statement to determine the correct answer:
A. The statement suggests that the tRNA anticodon UCU pairs with the mRNA codon AGA. To determine if this is correct, we need to use the rules of base pairing. In DNA and RNA, adenine (A) pairs with thymine (T) in DNA or uracil (U) in RNA, and cytosine (C) pairs with guanine (G). If we apply these rules, we can see that UCU and AGA are not complementary to each other. Therefore, statement A is incorrect.
B. The statement states that the tRNA anticodon is read from the 5’ to the 3’ end. This statement is true. During translation, the mRNA is read in the 5' to 3' direction, and the tRNA anticodon is complementary to the codon on the mRNA. Therefore, statement B is correct.
C. The statement suggests that a tRNA anticodon can pair with only one mRNA codon. This statement is also true. Each anticodon is specific to a particular amino acid, and a tRNA molecule carries only one type of amino acid. Therefore, it pairs with only one specific codon that codes for that amino acid. Therefore, statement C is correct.
D. The statement suggests that the mRNA codon ACG base pairs with the tRNA anticodon TGC. To determine if this is correct, let's apply the rules of base pairing. In this case, A in the codon pairs with U in the anticodon, C in the codon pairs with G in the anticodon, and G in the codon pairs with C in the anticodon. Therefore, statement D is incorrect.
Based on our analysis, the correct answer is C. A tRNA anticodon can pair with only one mRNA codon.
Since this is not my area, I looked it up on the Internet:
The anticodon is located in the Anticodon arm of the molecule of tRNA, while the codons are located in the molecule of DNA and mRNA. The anticodon is complementary to the respective codon, and the codon in the mRNA is complementary to a nucleotide triplet from a certain gene in the DNA.
I hope this helps. If not, make further use of the Internet.