Describe the differences in the two ends of a nucleic acid.

Video transcript

Hello everyone. Today, we have a following problem which of the statements below regarding the ends of nucleic acids are incorrect. So we'll start with statement one, it states the five partment of a nucleic acid has a free phosphate group attached to the five carbon of the sugar. So this if we draw out a standard nucleotide, we should not the Robie phosphate group that is bandy two, a sugar, which for this example, we will draw as a ribose sugar and then we will have a nitrogenous base. Now the nitrogenous base will be on carbon, one of the sugar and a free hydroxyl group that participates in bonding will be on carbon three, followed by the phosphate group being on carbon five. Now, if we were to draw the three end or three prime end and five prime end as the following, we would not. That statement. One is actually going to be correct statement. Two says that the three primate of a nuclear gas has a free hydroxy group attached to the second carbon of the sugar. Well, this is actually going to be incorrect. And part of our answer as the three prime end does have a hydroxyl group, but it attaches to a third prime end. Not the second statement. Three says that nucleotides are always added to the five prime end during DNA and RN A synthesis. This is also going to be incorrect. And part of our answer as nucleotides are always added to the three prime. And, and the statement for says that the five prime in and three prime in of a nucleic acid are in structure. Well, we already indicated and we already stated that the five prime end has a phosphate group while the three prime and has a hydroxyl group making statement four part of our answer as incorrect, making the correct answer statements 23 and four. And with that, we have solved the problem overall, I hope this helped hand until next time.