Match the following statements with rRNA, mRNA, or tRNA:

Question

b. brings amino acids to the ribosomes for protein synthesis

Accepted Answer

All right. Hello everyone. So this question is asking us which of the following statements correctly describe the function and structure of TRN A and select all that apply. So here we have four different statements which we'll discuss later on and four different answer options proposing different combinations of these statements that could be true. So before we talk about each statement individually, I briefly just want to give an overview of TRN A and the role of TRN A now for starters, right? Trn A stands for transfer RN A. And so the name implies that it's involved in the maybe the transport of something, right, the transfer of something and that's true, right? Because the role of transfer RN A because here it's important to recall the role of TRN A in translation. So first, just to very quickly summarize, right, recall that translation is the conversion of an MRN A molecule into a protein or more specifically, it's converted into a sequence of amino acids that then forms a functional protein after folding. So during this process, right, when we're looking at the MRN A template, we see what are called coons, right? And codons are groups of three nucleotides within the MRN A, that code for one amino acid as a unit. So for example, I could have the code on GA A and this codon represents one amino acid. And so the role of tr A has to do with transferring the amino acids necessary to build the growing protein depending on what coons it encounters. So, as mentioned before, right, we have an example, code on and on every TNA is an anti codon. And so the anticodon is the compliment, right? It contains a sequence that is complementary to the coon. So if the example coon is ga A, the anti codon would be cu because this is RN A. So here, right, the idea is that once the anticodon of the TRN A binds to the coon of the MRN A, the amino acid that the TRN A is carrying is then added to the growing polypeptide. So now that we have this context in mind, let's talk about the answer options or excuse me, the statements here starting off with statement one which says that TRN A carries amino acids to the ribosome during translation. This is true, right? Because as mentioned before, the role of a TRN A is to bring a specific amino acid to the ribosome, which if you recall is responsible for assembling the polypeptide chain that eventually becomes a protein. Moving on to statement too. It says that Trna has an anticodon that pairs with the codon on Mrna. This is also true because the TRN A as mentioned before has an anticodon that is the complement of a given coon on the MRN A strand. This specificity, right. This requirement of the complementary binding ensures that the right amino acid is being added where it should be depending on the MRN A template. From here, we have statement three which says that Trna directly synthesizes proteins by linking amino acids together. This is not true, right? Because recall that when talking about statement number one, we established that the ribosome is responsible for assembling the polypeptide chain that eventually becomes a protein. The role of TRN A is crucial because it brings amino acids to the ribosome assembling the polypeptide, but it itself is not assembling anything. And last but not least we have statement four that says that each trn A molecule can carry any amino acid depending on the cells needs. This is not true, right? Because MRN A sequences are precise, they code for certain proteins depending on what code on you have at a given point. So each trn A is specific to a particular amino acid. And so it is that specific amino acid that's brought to the growing polypeptide chain, once the anticodon of the TRN A binds to the coon of the MRN A and the attachment of an amino acid is facilitated by an enzyme known as amino AO trn A synthesis or synthese. Excuse me, So this enzyme, the amino azole trn A synthese, makes sure that only the correct amino acid for that TRN A is attached to it. So there you have it, right? Just to go ahead and summarize only the first two statements are correct, which means that option A is our answer. And so with that being said, thank you so very much for watching. And I hope you found this helpful.

Match the following statements with rRNA, mRNA, or tRNA:
b. brings amino acids to the ribosomes for protein synthesis

Key Concepts

tRNA (Transfer RNA)

rRNA (Ribosomal RNA)

mRNA (Messenger RNA)

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