CLASS DNA replication video
DNA Youtube video claymation
DNA Replication (Inquiry and Research)
1. One of the analogies that represents the process of DNA replication is the paper cutting activity. When we cut the paper in half and paired it with another half of the same thing, this created a replication. This is similar to when an enzyme runs down the DNA strand and copies it into another DNA.
2. The complementary base pairing rule in DNA makes replication possible because the enzyme can only copy half of the DNA. It is easy to determine the other side because if you look at the nitrogen bases: adenine and thymine always half to be pair together, so do Guanine and Cytosine. So if one side strand is ATTGCCGTAAT, we know that the other is TAACGGCATTA.
3. Enzymes are substances that are produced by living organisms and they help with biochemical reactions. Three enzymes that are used in DNA replication are: helicase, RNA primase, and DNA polymerase. Helicase unzips the DNA strands so that it can be copied, RNA primase lays down RNA primers on the lagging strand, and DNA polymerase reads the DNA, and adds nucleotides.
4. DNA replication starts when a helicase unzips the double-stranded structure of the DNA. This turns the DNA into the shape of a fork in the road. One is the leading strand, while the other way is the lagging strand of the DNA. The leading strand goes from 3’ to 5’ (this shows the position of the molecule, compared to the amount of carbon atoms it contains. On this strand, Pol III reads the DNA and adds nucleotides to it continuously. On the other side, the lagging strand moves from 5’ to 3’. Pol III cannot read in the 5’ to 3’ direction. Instead, primase reads the DNA and adds RNA to it in small intervals. Pol III lengthens the intervals with deoxyribonucleotides. Pol I then reads the fragments, removes the RNA, and adds its own nucleotides.
5. Junk DNA is DNA in cells that has no purpose. The DNA does not have any function or purpose. Scientist speculate that this DNA once had a purpose or it is for future use, but in organisms there is no observable way this DNA does anything in cells. The DNA is called junk DNA because there is no purpose for it. It only takes up space in the DNA molecule and is a dead-weight. This DNA is junk, as it has no use just as real junk.
2. The complementary base pairing rule in DNA makes replication possible because the enzyme can only copy half of the DNA. It is easy to determine the other side because if you look at the nitrogen bases: adenine and thymine always half to be pair together, so do Guanine and Cytosine. So if one side strand is ATTGCCGTAAT, we know that the other is TAACGGCATTA.
3. Enzymes are substances that are produced by living organisms and they help with biochemical reactions. Three enzymes that are used in DNA replication are: helicase, RNA primase, and DNA polymerase. Helicase unzips the DNA strands so that it can be copied, RNA primase lays down RNA primers on the lagging strand, and DNA polymerase reads the DNA, and adds nucleotides.
4. DNA replication starts when a helicase unzips the double-stranded structure of the DNA. This turns the DNA into the shape of a fork in the road. One is the leading strand, while the other way is the lagging strand of the DNA. The leading strand goes from 3’ to 5’ (this shows the position of the molecule, compared to the amount of carbon atoms it contains. On this strand, Pol III reads the DNA and adds nucleotides to it continuously. On the other side, the lagging strand moves from 5’ to 3’. Pol III cannot read in the 5’ to 3’ direction. Instead, primase reads the DNA and adds RNA to it in small intervals. Pol III lengthens the intervals with deoxyribonucleotides. Pol I then reads the fragments, removes the RNA, and adds its own nucleotides.
5. Junk DNA is DNA in cells that has no purpose. The DNA does not have any function or purpose. Scientist speculate that this DNA once had a purpose or it is for future use, but in organisms there is no observable way this DNA does anything in cells. The DNA is called junk DNA because there is no purpose for it. It only takes up space in the DNA molecule and is a dead-weight. This DNA is junk, as it has no use just as real junk.