Evaluate the following statements related to the synthesis of nucleic acids. Select True or False for each statement.
T/F Ribonucleotides are added to the 3′ end of a DNA strand.
T/F Polymerization of nucleic acids occurs by the formation of phosphodiester bonds.
T/F Complementary pairing between sugars is required for copying nucleic acids.
T/F Strands in a double helix are synthesized in an antiparallel orientation.

Question

Evaluate the following statements related to the synthesis of nucleic acids. Select True or False for each statement.

T/F Ribonucleotides are added to the 3′ end of a DNA strand.

T/F Polymerization of nucleic acids occurs by the formation of phosphodiester bonds.

T/F Complementary pairing between sugars is required for copying nucleic acids.

T/F Strands in a double helix are synthesized in an antiparallel orientation.

Accepted Answer

Hello everyone. And in today's video we have the following problem. We need to identify the incorrect statement regarding DNA replication, Remember that? We're looking for the incorrect statement as we solve this problem. Now DNA replication and one should recall is the process of replicating a DNA strand. So we have A D N. A strand as the starting point and we finish with another D N. A strand, which is a replicate of the original one. Now that we know this, let's jump over as a choices so that we can start solving the problem. So we have the answer choice A is deoxyribonucleic types are added to the three prime end of the D N. A strand. Well, there is this enzyme called DNA preliminaries whose job is to add DNA nucleotides or die oxy rival nucleotides to the three prime end of the growing DNA strand. So it is actually going to be a correct statement. Since we're looking for the incorrect one, we're going to cancel this out, then we have DNA replication occurs through the formation of phosphoric ester bonds. Remember that phosphate forms the backbone of D. N. A. So if we want to join these new DNA nucleotides that are joining the strands together, we're going to add these forceful di ester bonds. These are going to be the ones that are responsible for these linkage or these phosphate ester linkage to occur and join together the new nucleotides. So it's actually going to be correct as well and we're going to cancel this out, then we have see DNA replication is semi conservative. This is a very important point that you need to understand. So when we have a DNA strand form of two double helix is they become separated and each strand is replicated on its own. So each new strand that is formed is going to have one of the original strength and one of a newly replicated strength. This process is called semi conservative replication and this is how D. N. A. Is actually replicated in ourselves. So we're going to cancel this out as well because it is a correct statement. Now, we have D both strands of DNA are synthesized in the same manner. So we already saw here that we actually just separate the D. N. A strands into just individual strands in order to replicate them since one strand runs five prime 23 prime, And the other strand runs three prime to five prime. We're going to be adding nucleotides to this side of the strand for the strand and we're going to add nucleotides to this side of the strand on this trend because nucleotides are always added to the growing three prime end of the strands. So they're not going to the new D. N. A strands are not going to be synthesized in the same manner. So this is what the question means. And this is actually an incorrect statement. So we're going to highlight this as being the final answer to our question. So I really hope this video helped you and I hope to see you on the next one.

Verified video answer for a similar problem:

Key Concepts

Nucleic Acid Synthesis

Phosphodiester Bonds

Antiparallel Orientation