How does DNA replication IB Biology?
DNA replication is the production of two DNA molecules from one original DNA molecule. In DNA replication the first step is to unwind the double helix and separate the two strands. Helicase is the enzyme that does this. DNA polymerase is the enzyme that builds these new strands.
What is a similarity between DNA and RNA IB?
Both DNA and RNA have four nitrogenous bases each—three of which they share (Cytosine, Adenine, and Guanine) and one that differs between the two (RNA has Uracil while DNA has Thymine).
What is DNA Bioninja?
• DNA is a double helix molecule made of two antiparallel strands of nucleotides linked by hydrogen bonding. between complementary base pairs.
What are Okazaki fragments IB Biology?
The leading strand only needs one primer while the lagging strand needs quite a few as it is formed in fragments. These fragments are called Okazaki fragments. DNA polymerase I will remove the RNA primers and replace these with DNA.
What is PCR Bioninja?
The polymerase chain reaction (PCR) is an artificial method of replicating DNA under laboratory conditions. The PCR technique is used to amplify large quantities of a specific sequence of DNA from an initial minute sample.
What is the genetic code IB?
The genetic code is the codons within DNA and RNA, composed of triplets of bases which eventually lead to protein synthesis.
Is HL biology hard IB?
There are many reasons that make each class hard in its own way, but IB Biology is by far the most challenging class, and students taking it to face many challenges and hardships.
Is topoisomerase the same as DNA gyrase?
Gyrase is involved primarily in supporting nascent chain elongation during replication of the chromosome, whereas topoisomerase IV separates the topologically linked daughter chromosomes during the terminal stage of DNA replication.
Which is the lagging strand of DNA?
The lagging strand is a single DNA strand that, during DNA replication, is replicated in the 5′ – 3′ direction (opposite direction to the replication fork). DNA is added to the lagging strand in discontinuous chunks called ‘okazaki fragments’.
What is PCR used for IB Biology?
The main learning point is that PCR can be used to amplify very small amounts of DNA into large numbers of molecules for analysis.
What is PCR Biology IB?