Suppose the DNA synthesis that occurs in PCR is less accurate than cellular DNA synthesis (as in, PCR has a higher error rate than normal DNA synthesis). This difference in error would most likely be because the polymerase used in PCR: a) has a low level of 5' to 3' exonuclease activity b)has a low level of 3' to 5' exonuclease activity c) has a low temp at which it denatures d) adds to the 5' end of the growing DNA chain e) does not use template

Suppose the DNA synthesis that occurs in PCR is less accurate than cellular DNA synthesis (as in, PCR has a higher error rate than normal DNA synthesis). This difference in error would most likely be because the polymerase used in PCR: a) has a low level of 5' to 3' exonuclease activity b)has a low level of 3' to 5' exonuclease activity c) has a low temp at which it denatures d) adds to the 5' end of the growing DNA chain e) does not use template

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter13: An Introduction To Genetic Technology

Section: Chapter Questions

Problem 17QP

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To amplify a section of DNA using the polymerase chain reaction (PCR), all you need to load into the tube is 1) a buffer solution, 2) the DNA you want to amplify, 3) some DNA nucleotides, 4) a polymerase (like Taq polymerase), and O an RNA polymerase a set of forward and reverse primers some phospholipids for a cell membrane some ribosomes
You are working in a molecular biology laboratory and are having challenges with your PCR. You decide to double-check the PCR protocol programmed into the thermal cycler and discover that the annealing temperature was programmed to be 65 °C instead of 50 °C, as you had intended. What effects would this mistake have on the PCR reaction? Suggest potential solution(s).
The exponential nature of PCR allows spectacular increases in the abundance of a DNA sequence being amplified. Consider a 10-kbp DNA sequence in a genome of 1010 base pairs. What fraction of the genome is represented by this sequence; i.e., what is the fractional abundance of this sequence in this genome? Calculate the fractional abundance of this target sequence after 10, 15, and 20 cycles of PCR, starting with DNA representing the whole genome and assuming that no other sequences in the genome undergo amplification in the process.
Suppose that you want to clone a gene that has never been analyzed before by DNA sequencing. Which of the following is the most accurate? O Perform a PCR to clone the gene because it is much faster. Perform a PCR to clone the gene because it is very specific and gives a high yield. O PCR cannot be performed because the DNA sequence is not known yet so the forward and reverse primers cannot be designed. O PCR can be performed because although the DNA sequence of the sample is not known yet, an available primer can still be used.
Describe the possible outcome of a PCR experiment in which (a) one of the primers is inadvertently omitted from the reaction mixture and (b) one of the primers is complementary to several sites in the starting DNA sample.
Predict the effect on the PCR reaction if any of the following circumstances arose: i) there are no primers in the reaction, i) there are no dNTPs in the reaction, iii) there is no Taq polymerase in the reaction, A PCR would not commence. B. PCR would proceed normally. C. PCR would cease after a few cycles. D. Non-specific DNA amplification will occur.
PCR is a powerful technique to screen and amplify segments of DNA for use in recombinant protein technologies. Describe in detail, the components of a PCR reaction and why they are required
Polymerase Chain Reaction (PCR) was invented by Kary Mullis in 1983. This technique had indeed facilitated research in various areas of molecular biology and genetics. You would like to amplify a particular gene fragment from the yeast genome using Polymerase Chain Reaction (PCR). What are the THREE (3) main cycles in PCR? Discuss the processes at each PCR cycle mentioned.
PCR is quick, efficient and easy to perform. However, there are some situations when cell-based cloning is preferred over PCR to amplify a DNA sequence. Mention two of them.
In pcr: How do you know if it works? If you have more than one band in a lane, why what would be the reason?
a) (iii) (iv) Polymerase chain reaction (PCR) is a technique that enables multiplication of specific DNA sample at minute amount to millions or billions of copies at a short time span. (i) Figure 1 indicates the chemicals added into the PCR reaction tube prior to the addition of thermostable DNA polymerase. Do you agree with the list? Justify your answer. DNA template Buffer (containing Tris-HCI, KCI, Mg2+) ddNTP Forward primer Reverse primer Figure 1 If TA cloning is planned to be carried out after amplification of the gene, which thermostable DNA polymerase will you select and the reason for your selection? Why is the optimal annealing temperature vital in this technique? Explain how this temperature (too high or too low) will affect the efficiency of this reaction. If the primers you purchased possessed the following information: Number of Guanine: 4 Number of Adenine: 3 Number of Thymine: 4 Number of Cytosine: 5 Calculate the melting temperature of this primer and estimate the…
(i) (ii) What is the major difference between the conventional PCR and real time PCR (qPCR) in terms of function? SyBR green and Taqman dyes are usually utilized in real time PCR. Which dye is more sensitive and accurate? Explain your answer.