Chapter 20: Problem 1
What do restriction endonucleases do?
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These are the key concepts you need to understand to accurately answer the question.
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Chapter 20: Problem 1
What do restriction endonucleases do?
These are the key concepts you need to understand to accurately answer the question.
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What is a plasmid? a. an organelle found in many bacteria and certain eukaryotes b. a circular DNA molecule that replicates independently of the main chromosome(s) c. a type of virus that has a DNA genome and infects certain types of human cells, including lung and respiratory tract tissue d. a type of virus that has an RNA genome, codes for reverse transcriptase, and inserts a cDNA copy of its genome into cells
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Potato blight causes potato plants to shrivel and rot. The disease is caused by the pathogen Phytophthora infestans, infamous for its role in Ireland's Great Potato Famine in the mid- 1840 s. The disease can devastate crops during wet weather, sometimes leading to total crop loss. Current research aims to transfer blight resistance genes from resistant varieties into susceptible varieties of potatoes. Why was it important to include a positive control and a negative control in the PCR analysis?
Once the gene that causes Huntington disease was found, researchers introduced the defective allele into mice to create an animal model of the disease. Why was this model valuable? a. It allowed the testing of potential drug therapies without endangering human patients. b. It allowed the sequencing of the mutant allele. c. It allowed the production of large quantities of the huntingtin protein. d. It allowed the study of how the gene was transmitted from parents to offspring.
In a genomics-based search for mutations that caused a patient's cancer, which of the following would provide the most informative comparison with the cancer cell? a. the DNA sequence of a cell from a mouse with a similar cancer b. the DNA sequence of a noncancerous cell from another person c. the DNA sequence of a noncancerous cell from the patient d. the DNA sequence of another cancer cell from the patient
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