HUMAN BIOLOGY: CONCEPTS - 9780134312729
8th Edition
ISBN: 2819260095972
Author: Johnson
Publisher: PERUSALL
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Chapter 20, Problem 1TY
Summary Introduction
Introduction:
Plasmids are small self-replicating extra-chromosomal DNA (deoxyribonucleic acid) molecules. Plasmids play important roles in molecular biology, for example, gene cloning, recombinant protein production, and gene therapy. Plasmids are mostly found as circular, small, and double-stranded molecules of DNA in the bacteria.
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Which of the following enzymes is responsible for "exposing" or "unwinding" the DNA template (taking it out of its double helix) for DNA Replication?
a.
Topoisomerase
b.
Telomerase
c.
DNA Ligase
d.
Primase
e.
Helicase
Choose the combination of answers that most accurately completes the statement.The function of ligase is to a. rejoin segments of DNA c. synthesize cDNA b. make longitudinal cuts in DNA d. break down ligaments
DNA polymerases make errors in matching as DNA is synthesized. These errors can be detected and repaired by:
A.
Ligase
B.
DNA polymerase
C.
Primase
D.
Helicase
Chapter 20 Solutions
HUMAN BIOLOGY: CONCEPTS - 9780134312729
Ch. 20 - Prob. 1QCCh. 20 - GM foods are created for a variety of reasons,...Ch. 20 - Should foods that contain genetically modified...Ch. 20 - Explain how DNA is sequenced.Ch. 20 -
2. Describe the enzymes used in recombinant DNA...Ch. 20 - Prob. 3CRCh. 20 - Discuss the polymerase chain reaction technique,...Ch. 20 - Prob. 5CRCh. 20 - Prob. 6CRCh. 20 - Prob. 7CR
Ch. 20 - Prob. 8CRCh. 20 - Prob. 9CRCh. 20 -
10. List the diseases that gene therapy may be...Ch. 20 - Prob. 1TYCh. 20 - Prob. 2TYCh. 20 - Which of the following is used to separate...Ch. 20 - Genetically engineered human insulin, human growth...Ch. 20 - Prob. 5TYCh. 20 - All of the following statements about transgenic...Ch. 20 -
7. "Gene pharming” refers to:
a. using transgenic...Ch. 20 - Prob. 8TYCh. 20 - Prob. 9TYCh. 20 - Prob. 10TYCh. 20 - Which of the following is needed for sequencing...Ch. 20 - A tiny amount of blood was recovered from a crime...Ch. 20 - Which technique will allow amplification of the...Ch. 20 - A gene for a bacterial protein with insecticide...Ch. 20 - Prob. 15TYCh. 20 -
1. What do you think are the chances that someone...Ch. 20 - Imagine a future in which the respiratory effects...Ch. 20 - Prob. 3AWKCh. 20 - Prob. 4AWKCh. 20 - Prob. 5AWKCh. 20 - There is interest in producing vaccines in foods....Ch. 20 - Transgenic plants have the potential to improve...
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- A DNA probe with sequence TCAGGCTTCAG would bind most strongly to which of the following DNA fragments? a. AGTCCGAAGTC c. GACTTCGGACT b. TCAGGCTTCAG d. UGAGGCUUGAGarrow_forwardWhich DNA polymerase in prokaryotes is involved in the replacement of primers with deoxynucleotides? a.DNA-Pol I b.DNA-Pol II c.DNA-Pol Ill d.DNA-Pol IVarrow_forwardChoose the combination of answers that most accurately completes the statement.Which of the following is not essential to carry out the polymerase chain reaction? a. primers c. gel electrophoresis b. DNA polymerase d. high temperaturearrow_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_forwardWhich of the following enzymes is responsible for ensuring that genetic material at the end of the chromosome is not lost during DNA replication? a. Helicase b. DNA Polymerase c. Telomerase d. DNA Ligase e. Primasearrow_forwardA scientist randomly mutates the DNA of a bacterium. She then sequences the bacterium’s daughter cells, and finds that the daughters have many errors in their replicated DNA. The parent bacterium likely acquired a mutation in which enzyme? a. DNA ligase b. DNA pol II c. Primase d. DNA pol Iarrow_forward
- Which of the following enzymes is NOT involved in DNA replication? a. DNA Polymerase b. Primase c. Helicase d. Phosphatase e. DNA Ligasearrow_forwardWhy is an RNA primer necessary for DNA replication a. The RNA primer is necessary for the activity of DNA ligase b. The RNA primer creates the 3’ end for DNA polymerase to add nucleotides c. DNA polymerase can only add nucleotides to RNA d. RNA primer is not necessary for DNA replicationarrow_forwardWhich of the following is not a part of the Sanger method tosequence DNA?a. dideoxynucleotides b. DNA polymerase c. electrophoresis d. reverse transcriptasearrow_forward
- Which type of mechanism best repairs thymidine dimers caused by exposure to UV light? a. Nucleotide excision repair b. Base excision repair c. Mismatch repair d. NHEJarrow_forwardWhich of the following one is liable for the conversion of covalently closed circular DNA to super coiled DNA of the plasmid? a.Exonuclease b. DNA Gyras c. Endonuclease d. Topoisomerasearrow_forwardA protein that can cut DNA at specific DNA base sequences is called a a. DNase. c. restriction enzyme. b. DNA ligase. d. DNA polymerase.arrow_forward
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