BIOLOGY-TEXT
5th Edition
ISBN: 9781260169621
Author: BROOKER
Publisher: MCG
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Textbook Question
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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Check out a sample textbook solutionStudents have asked these similar questions
Would it be possible to use human polymerase for the PCR reaction?
a.
No, because human polymerase does not have the ability to withstand the high temperatures required for the PCR reaction to occur.
b.
No, because human polymerase cannot be extracted from cells to use in a lab setting.
c.
Yes, because we are using human DNA as the template DNA.
d.
Yes, because human polymerase can add bases to a template strand without a primer.
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.
Chapter 21 Solutions
BIOLOGY-TEXT
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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- 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 endonucleasesarrow_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
- Place the following steps in order to outline how enzymes are involved with proofreading newly formed DNA molecules. 1. DNA polymerase does not detect damaged DNA. 2. Ligase connects the free end of the new DNA with the old DNA. 3. DNA polymerase replaces the damaged DNA with the correct nucleotide. 4. Exonuclease cuts the damaged DNA strand in order to remove the damaged section.arrow_forwardMatch 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_forward
- Which of the following correctly matches the step of polymerase chain reaction (PCR) with its events? A. Extension - reaction is cooled and primers bind to complementary sequences on template DNA. B. Denaturation - high temperature separates the DNA C. Annealing - Taq polymerase extends the primers, synthesizing DNAarrow_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_forwardWhat is DNA polymerase? a.An enzyme that carries out DNA replication b.Short, single strand of DNA that base-pairs with a specific DNA sequence c.An enzyme that corrects mutations that arise during the replication of DNA d.An enzyme that seals any gaps that remain between bases of replicating strands of DNAarrow_forward
- What 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_forwardWhat 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_forwardMatch the terms associated with the polymerase chain reaction with their correct descriptions. Refers to the fact that DNA molecules get longer the more of them there are in the reaction. A. В. Heat the sample to a high temperature (usually 94°C) to separate all DNA strands from each other. Denaturation C. Incubate the reaction at the optimal temperature for the primers to base-pair with each other. Annealing. D. Incubate at a low enough temperature (usually-55°C) so that primers base-pair with their complementary sequence. Extension. Add a chaotropic agent that destabilizes hydrogen bonding. E. Amplification. F. Incubate the sample at a temperature that is optimal for thermostable Taq DNA polymerase (usually -72°C). G. Happens after repeated cycles of the temperature change regimen. Refers to the quadrupling of the target DNA sequence in every cycle of the temperature regimen. Н.arrow_forward
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