Human Biology: Concepts and Current Issues (8th Edition)
8th Edition
ISBN: 9780134312729
Author: Johnson
Publisher: PEARSON
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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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Students have asked these similar questions
What do genetic engineers use to create the “sticky ends” needed to splice two fragments of DNA together?
a.) an amino acid sequence
b.) DNA ligase
c.) restriction enzymes
d.) mRNA
The function of a restriction enzyme is to
a. prevent the movement of DNA outside the nucleus
b. separate the DNA double helix
c. cut the nucleotide sequence at a specific location in DNA
d. proofread DNA for accidental damages and corrects these errors
Choose the combination of answers that most accurately completes the statement. Which gene is incorporated into plasmids to detect recombinant cells? a. restriction endonuclease c. a gene for antibiotic resistance b. virus receptors d. reverse transcriptase
Chapter 20 Solutions
Human Biology: Concepts and Current Issues (8th Edition)
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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- Which type of cells were used to extract the DNA that was sequenced? a. red blood cells c. white blood cells b. intestinal epithelium d. cheek swab What type of mutation caused Nicholas’s disease? a. frameshift c. nonsense b. missense d. insertionarrow_forwardWhy must a genetically engineered plasmid contain a genetic marker? a.) to prevent the construction of an artificial chromosome b.) to separate cells that contain recombinant DNA from those that do not c.) to produce multiple copies of the recombined plasmid after heat treatment d.) to break apart the circular plasmid and introduce another DNA fragmentarrow_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
- Base analogs are mutagenic because of which characteristic? a. They produce changes in DNA polymerase that cause it to malfunction. b. They distort the structure of DNA. c. They are similar in structure to the normal bases. d. They chemically modify the normal bases.arrow_forwardWhy is DNA ligase so important in recombinant DNA technology? a.) It causes DNA to make multiple copies of itself. b.) It joins two DNA fragments together. c.) It shapes bacterial DNA into a circular plasmid. d.) It cuts DNA into restriction fragments.arrow_forward_____ cut(s) DNA molecules at specific sites. a. DNA polymerase c. Restriction enzymes b. DNA probes d. Reverse transcriptasearrow_forward
- What 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_forwardFrom where do we get primers for sequencing DNA? A) they are synthesized by reverse transcriptase B) they are cut out of plasmids using restriction endonucleases C) DNA primase is added to the sequencing reaction and synthesizes the primers D) biotechnology companies synthesize them using organic chemistryarrow_forwardFor what purpose is DNA fingerprinting used A) to sequence DNA from bacteria B) to separate DNA fragments C) to identify individuals who have committed crimes D) to identify single nucleotide polymerasearrow_forward
- What is the enzymatic function of restriction enzymes? Group of answer choices a. to cut nucleic acids at specific sites b. to join nucleotides during transcription c. to add new nucleotides to the growing strand of DNA d. to repair breaks in sugar - phosphate backbonesarrow_forwardRestriction enzymes found in bacterial cells are ordinarily useda. during DNA replication.b. to degrade the bacterial cell’s DNA.c. to degrade viral DNA that enters the cell.d. to attach pieces of DNA together.arrow_forwardChoose the one answer that fits best. Which statement regarding Molecular Biology is NOT correct (videos)? a. Taq Polymerase was isolated from an organism found in Yellowstone Park b. Restriction enzymes leave sticky ends c. DNA sequencing allows us to read DNA sequences d. Restriction enzymes cut DNA at specific sites e. EcoRI and HindII are commonly used polymerasesarrow_forward
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