Transfer RNA (tRNA)                   . a. carries monosaccharides to the ribosome for synthesis; b. is made of messenger RNA; c. has an anticodon region that is complementary to the mRNA codon; d. is the site of protein synthesis

Video transcript

Hi everyone. Let's look at our next problem. It says the molecule that carries amino acids to the ribosomes during translation is and we have four choices of different types of R N. A. T E R N A. R R N A. M R N. A. And S. I R N. A. So let's walk through these Choice A. Is T. R N. A. All the T. There stands for transfer oops. And as we might guess from the name, this is the carrier that we're looking for. It brings a specific amino acid over to the ribosomes where the anti code on on it um finds its complementary code on on the messenger RNA. And that will allow the amino acid it carries to be added on to the growing peptide strand. So choice A. T. E R N. A is what we're looking for here. But let's talk through the remaining answers. Choice B. Says R R N. A. R. There stands for ribosomes. Oops, there there. Izumo R. N. A. And the R. R. N. A. Combines with protein to form the ribosomes. That's its name. And so it's makes up ribosomes. It has different binding sites on its part of this process of building up the new protein. Um So it has binding sites for the T. R. N. A. And it's their aiding the whole process but it's not actually bringing amino acids to ribosomes. It's there as making up part of the ribosomes, a large portion of them. So it's not our answer choice. So we can cross out Choice B. Choice C. Is M. RNA. And that's of course our most famous we might say RNA. The messenger R. N. A. And that's of course our intermediate in that D. N. A. To protein process. Getting transcribed from its D. N. A. Template and then forming the strand of code owns that codes for the amino acids to make up a new protein. So that is not our answer. So we're gonna eliminate that. And finally we've got S. I. R. N. A. Some obscure little guy that stands for silent interfering oops interfering or just silent RNA. And these are small double stranded RNA molecules that actually interfere. Oops it's your sponsor here today. They interfere with the expression of certain genes and they do that by binding they have a nucleotide sequence. They bind to the commentary sequence on the M. R. N. A. And when they do that they actually degrade that portion of the M. RNA, preventing the translation of a specific gene. So, silent interfering RNA. Very interesting but not what we're looking for. So we eliminate choice at the and again the molecule that carries amino acids to the ribosomes is choice A TR. N. A. Transfer RNA. Thanks for watching