Why are the two strands of nucleotides in a DNA molcule required to be separated during PCR?
Question
Why are the two strands of nucleotides in a DNA molcule required to be separated during PCR?
Solution
The two strands of nucleotides in a DNA molecule need to be separated during Polymerase Chain Reaction (PCR) for several reasons:
-
Denaturation: The first step in PCR is denaturation. This is where the double-stranded DNA molecule is heated to break the hydrogen bonds between the base pairs. This separation results in two single strands of DNA.
-
Annealing: The next step is annealing. Here, short pieces of DNA called primers attach themselves to each of the single strands. The primers are designed to bind at the start and end of the section of DNA to be copied. However, they can only bind if the two strands of the DNA molecule have been separated.
-
Extension: The final step is extension. Here, an enzyme called DNA polymerase attaches itself to the primers and adds nucleotides to extend the sequence. This can only occur if the DNA strands are separated, as the enzyme needs to be able to read the sequence of nucleotides on the single strand in order to create a complementary strand.
In summary, the two strands of nucleotides in a DNA molecule need to be separated during PCR to allow the primers and DNA polymerase to bind and create new copies of the desired DNA sequence.
Similar Questions
Organize the following steps of a PCR cycle in the correct sequence.The mixture is cooled to allow the binding of primers to the end of target DNA sequences.Free nucleotides are added in the 5’ to 3’ direction by the Taq DNA polymerase.The reaction mixture is heated to separate the double-stranded DNA.Group of answer choices1, 2, 31, 3, 22, 1, 32, 3, 13, 1, 23, 2, 1
The pairing of complementary bases in DNA (through hydrogen bonding) means that the information contained within each strand is redundant. Phosphodiester (intra-strand) bonds are stronger than hydrogen (inter-strand) bonds. The actual job of the phosphodiester bonds is where in DNA polymers connect the 5' carbon atom of one nucleotide to the 3' carbon atom of another nucleotide, while the hydrogen bonds stabilize DNA double helices across the helix axis but not in the direction of the axis.[19] This makes it possible to separate the strands from one another. The nucleotides on a single strand can therefore be used to reconstruct nucleotides on a newly synthesized partner strand.[20]
1. QuestionPolymerase chain reaction (PCR) is a DNA manipulation technique used to: Cut DNA molecules at specific sequences of nucleotides Separate DNA molecules according to size Join molecules of DNA together Copy specific regions of DNA2. QuestionWhat occurs in the first step of PCR? DNA strands are separated by heating them Primers bind to target DNA strands Taq DNA polymerase builds a new DNA molecule using the target strand as a template3. QuestionWhat occurs in the second step of PCR? DNA strands are separated by heating them Primers bind to target DNA strands Taq DNA polymerase builds a new DNA molecule using the target strand as a template4. QuestionWhat occurs in the final step of PCR? DNA strands are separated by heating them Primers bind to target DNA strands Taq DNA polymerase builds a new DNA molecule using the target strand as a template5. QuestionWhy are the two strands of nucleotides in a DNA molcule required to be separated during PCR?6. QuestionReferring to the image below, which primer will bind to the sequence of nucleotides? Primer 1 Primer 2 Neither primer will bind7. QuestionHow does Taq DNA polymerase extend a new strand of nucleotides? By adding nucleotides that are identical to the original strand By adding nucleotides that are complementary to the original strand By joining primers together
What is different from one DNA nucleotide to the next?
What are the three common parts of a nucleotide?
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.