Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 21, Problem 4TY
Why is Taq polymerase used in PCR rather than other DNA polymerases?
- a. Taq polymerase is a synthetic enzyme that produces DNA strands at a faster rate than natural polymerases.
- b. Taq polymerase is a heat-stable form of DNA polymerase that can function after exposure to the high temperatures necessary for PCR.
- c. Taq polymerase is easier to isolate than other DNA polymerases.
- d. Taq polymerase is the DNA polymerase commonly produced by most eukaryotic cells.
- e. All of the above are correct.
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Choose the one answer that fits best. Which statement regarding PCR is NOT correct (videos)?
a.
PCR requires a copy of RNA that serves as a template
b.
Taq polymerase adds nucleotides to the primers and creates a complementary strand of DNA
c.
Annealing requires cooler temperatures than denaturation
d.
Repeated cycles of denaturation, annealing and extending DNA strands creates many identical copies of DNA
e.
PCR is a quick way of using minute quantities of DNA to create millions of copies
Which of the following describes an advantage of using a recombinant plasmid for DNA cloning over PCR?
A. PCR is more likely to have errors introduced in the copying process.
B. Recombinant DNA plasmids are able to create large amounts of copies more quickly than PCR.
C. PCR can only be conducted in eukaryotic cells.
D. PCR requires prior knowledge of the sequence in question, while a recombinant plasmid does not.
PCR is a technique used to synthesize DNA fragments. Select all the reagents needed for PCR to occur.
A. DNA template
B. Thermo stable DNA polymerase
C. Two primers
D. Type I endonucleases
Chapter 21 Solutions
Biology
Ch. 21.1 - Prob. 1CSCh. 21.1 - Prob. 1CCCh. 21.1 - Prob. 2CCCh. 21.1 - Prob. 3CCCh. 21.2 - Prob. 1CCCh. 21.2 - Prob. 2CCCh. 21.2 - Prob. 3CCCh. 21.3 - Prob. 1EQCh. 21.3 - Prob. 2EQCh. 21.3 - Prob. 3EQ
Ch. 21.4 - Prob. 1CCCh. 21.4 - Prob. 1CSCh. 21.5 - Prob. 1CSCh. 21.5 - Repetitive Sequences and Transposable Elements...Ch. 21 - Prob. 1TYCh. 21 - DNA ligase is needed in a cloning experiment a. to...Ch. 21 - Prob. 3TYCh. 21 - Why is Taq polymerase used in PCR rather than...Ch. 21 - Lets suppose you want to clone a gene that has...Ch. 21 - In the CRISPR-Cas technology for editing genes,...Ch. 21 - Prob. 7TYCh. 21 - The enzyme that helps short segments of DNA move...Ch. 21 - Prob. 9TYCh. 21 - Which of the following was not a goal of the Human...Ch. 21 - Prob. 1CQCh. 21 - Briefly describe whether or not each of the...Ch. 21 - Prob. 3CQCh. 21 - Identify and discuss three important advances that...Ch. 21 - Prob. 2COQ
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- Which of the following is not essential to carry out the polymerasechain reaction?a. primers b. DNA polymerase c. gel electrophoresis d. high temperaturearrow_forwardThe diagram illustrating the polymerase chain reaction (PCR) technique is provided below. How does the number of copies of the DNA region being amplified change at the end of each cycle of the polymerase chain reaction? Group of answer choices a. The number of copies triples (or triplicates). b. The number of copies does not change. c. The number of copies quadruples (or quadruplicates). d. The number of copies doubles (or duplicates). e. The number of copies halves.arrow_forwardWhat is the purpose of the low temperature step in the PCR reaction? a. To allow DNA polymerase to synthesize new DNA in the 3' to 5' direction b. To permanently deactivate DNA polymerase c. To allow primers to anneal to DNA templates d. To allow DNA polymerase to synthesize new DNA in the 5' to 3' directionarrow_forward
- Match the following terms with their definitions and label each component of the PCR mixture in the diagram (use the letters A-D):I. DNA polymeraseII. PrimersIII. NucleotidesIV. Genomic DNA template A. DNA that contains the target sequence that will be replicated using PCR.B. An enzyme that copies the DNA sequence.C. A mixture of 4 nucleotides (A,G,C, and T) that will be polymerized into the replicated DNA sequence.D. A short DNA sequence that allows the enzyme to bind and initiate polymerization.arrow_forwardFor DNA amplification using PCR to occur, which of the following are needed? A. DNA primers B. thermo stable DNA polymerase C. Helicase D. Choices A and Barrow_forwardWhat would be the outcome if the primers used in a polymerase chain reaction have lower GC content (<40 %), shorter, and more variable than the intended oligonucleotide sequence? a.The PCR reaction will cease after the first cycle b.The reaction will yield a mixture of non-specific products. c.All of these d.The PCR reaction will not start. e.The reaction will yield a single short PCR product.arrow_forward
- What would be the effect of performing a RT-PCR with the following ingredients: an mRNA template, appropriate primers, dNTPs, heat-stable reverse transcriptase and human DNA polymerase? Select one: a. The PCR would occur, but with a high mutation rate b. The PCR reaction will not commence c. Non-specific PCR of random templates will occur d. The RNA template would be converted to DNA, but the DNA segment would not be amplified PCR would proceed normally е.arrow_forwardWhich of the following is FALSE about current Sanger dideoxy DNA sequencing procedures? a. Chain termination occurs during synthesis of a new DNA strand. b. Many steps can be automated. c. No DNA is synthesized in the procedure. d. Fluorescent molecules can be used to detect the DNA.arrow_forwardPredict 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.arrow_forward
- Which of the following is involved in recombinant DNA technology? Explain. MULTIPLE CHOICE. Choose only one: a. DNA polymerase b. DNA probes c. Restrition enzymes d. Reverse transcriptasearrow_forwardWhich of the following best describes the process of DNA seqencing. a. DNA is seperated on a gel and the different bands are labled with flouroscent nucleotides and scanned with a laser. b. A laser is used to flurorescently label the nucleotides present with in the DNA , the DNA is run on a gel and then the DNA is droken into fragments c. Nucleotides are scanned with a laser and incrprorated into the DNA that has been seperated on a gel and then DNA is amplified with PCR. d. fragments of DNA are produced in a reaction that lables them with any of four different fluroscent dyes and the fragmented then are run on a gel and scanned with laser e. DNA is broken down into its constituents nucleotides and the nucleotides are then run on a gel and purified with a laserarrow_forwardA double stranded DNA molecule is shown below. The same DNA is shown below with the two strands separated. A series of potential PCR primers (labeled 1, 2, 3 and 4) that are complementary to the template DNA are shown. Which set(s) of PCR primers would allow a researcher to amplify the sequences beginning around position 10 and ending around 40? A. Primer 2 and Primer 3 B. Primer 2 and Primer 4 C. Primer 1 and Primer 4 D. Primer 1 and Primer 3arrow_forward
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