Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 9.1, Problem 1COMQ
In the experiment of Avery, McLeod, and McCarty, the addition of RNase or protease to a DNA extract
a. prevented the conversion of type S bacteria into type R bacteria.
b. allowed the conversion of type S bacteria into type R bacteria.
c. prevented the conversion of type R bacteria into type S bacteria.
d. allowed the conversion of type R bacteria into type S bacteria.
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In the experiment of Avery, McLeod, and McCarty, the additionof RNase or protease to a DNA extracta. prevented the conversion of type S bacteria into type R bacteria.b. allowed the conversion of type S bacteria into type R bacteria.c. prevented the conversion of type R bacteria into type S bacteria.d. allowed the conversion of type R bacteria into type S bacteria.
Griffith discovered a “transforming factor” in bacteria that conveyed infectiousness in 1928. In 1944, Avery, MacLeod and McCarty showed that the transforming factor is DNA
A. Both statements are correct
B. Both statements are incorrect
C. First statements is correct. Second statement is incorrect
D. First statements is incorrect. Second statement is correct
What was the key discovery of the experiments of Avery, MacLeod, and McCarty?
A. DNA degrading enzymes destroyed the ability of an extract to genetically transform bacteria.
B. Lipid degrading enzymes destroyed the ability of an extract to genetically transform bacteria.
C. Protein degrading enzymes destroyed the ability of an extract to genetically transform bacteria.
D. RNA degrading enzymes destroyed the ability of an extract to genetically transform bacteria.
Chapter 9 Solutions
Genetics: Analysis and Principles
Ch. 9.1 - In the experiment of Avery, McLeod, and McCarty,...Ch. 9.1 - In the Hershey and Chase experiment involving T2...Ch. 9.2 - Going from simple to complex, which of the...Ch. 9.3 - Which of the following could be the components of...Ch. 9.3 - Prob. 2COMQCh. 9.4 - Prob. 1COMQCh. 9.5 - Prob. 1COMQCh. 9.5 - Prob. 2COMQCh. 9.6 - 1. Which of the following is not a feature of the...Ch. 9.6 - 2. A groove in the DNA refers to
a. the...
Ch. 9.6 - Prob. 3COMQCh. 9.7 - 1. A double-stranded region of RNA
a. forms a...Ch. 9 - 1. What is the meaning of the term genetic...Ch. 9 - Prob. 2CONQCh. 9 - 3. Look up the meaning of the word transformation...Ch. 9 - Prob. 4CONQCh. 9 - 5. Draw the structures of guanine, guanosine, and...Ch. 9 - Prob. 6CONQCh. 9 - 7. Describe how bases interact with each other in...Ch. 9 - Prob. 8CONQCh. 9 - 9. What is meant by the term DNA sequence?
Ch. 9 - Make a side-by-side drawing of two DNA helices:...Ch. 9 - 11. Discuss the differences in the structural...Ch. 9 - What part(s) of a nucleotide (namely, phosphate,...Ch. 9 - List the structural differences between DNA and...Ch. 9 - Draw the structure of deoxyribose and number the...Ch. 9 - Write a sequence of an RNA molecule that could...Ch. 9 - Compare the structural features of a...Ch. 9 - Which of the following DNA double helices would be...Ch. 9 - What structural feature allows DNA to store...Ch. 9 - Prob. 19CONQCh. 9 - Prob. 20CONQCh. 9 - Prob. 21CONQCh. 9 - 22. On further analysis of the DNA described in...Ch. 9 - Prob. 23CONQCh. 9 - Prob. 24CONQCh. 9 - In what ways are the structures of an helix in a...Ch. 9 - Prob. 26CONQCh. 9 - Prob. 27CONQCh. 9 - 28. What chemical group (phosphate group, hydroxyl...Ch. 9 - The base composition of an RNA virus was analyzed...Ch. 9 - Prob. 30CONQCh. 9 - Prob. 31CONQCh. 9 - Prob. 32CONQCh. 9 - Prob. 33CONQCh. 9 - As described in Chapter 15, the methylation of...Ch. 9 - 35. An RNA molecule has the following sequence:...Ch. 9 - 1. Genetic material acts as a blueprint for an...Ch. 9 - 2. With regard to the experiment described in...Ch. 9 - Prob. 3EQCh. 9 - Prob. 4EQCh. 9 - 5. With regard to Chargaff’s experiment described...Ch. 9 - 6. Gierer and Schramm exposed plant tissue to...Ch. 9 - 1. Try to propose structures for a genetic...Ch. 9 - Prob. 2QSDC
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- In another experiment, Griffith mixed heat killed S strain with live R strain bacteria and injected the mixture into mice. A. What strain of the bacteria was found in the blood samples of the mice? B. What were the results of this experiment? C. What conclusion did he reach based on these results?arrow_forwardWhich of the following is not one of the ways that Avery’s transforming principle resembles DNA?a. It migrates like DNA in a centrifuge.b. It is not destroyed by DNA-digesting enzymes.c. It migrates like DNA in an electric field.d. It is not destroyed by protein-digesting enzymes.arrow_forwardArrange the following steps in the sequence they would happen in a DNA cloning experiment. a. sealing DNA fragments into vectors with DNA ligase; b. utilizing a probe to detect a clone in the library; c. sequencing the clone's DNA; d. creating a DNA library of clones; e. cutting genomic DNA with restriction enzymes. A. e,a,d,b,c B. a,d,b,c,e C. c,b,e,a,d D. e,d,a,c,barrow_forward
- Why is it important to use a hyperthermophilic DNA polymerase in PCR? a) Because only hyperthermophiles have DNA polymerases. b) Because hyperthermophilic DNA polymerase is able to resist the saline reaction conditions. c) Because hyperthermophilic DNA polymerase is faster than other polymerases. d) Because hyperthermophilic DNA polymerase is able to resist denaturation at 95℃.arrow_forwardWhich statement is true? a. There is no danger involved in recombinant DNA research in humans. b. Stringent safety rules make the use of recombinant DNA research impossible. c. There is no danger in releasing recombinant organisms into the environment. d. Stringent safety rules make the use of recombinant DNA research possible. e. There is no danger involved in recombinant DNA research in bacteria.arrow_forwardOne experiment that showed the DNA carried genetic information was the "Transformation" experiment by Avery, McCarty, and MacLeod where they injected mice with non-pathogenetic bacteria that had been incubated in the remains of pathogenic bacteria. What did they find when they incubated non-pathogenic bacteria in just the protein from the pathogenic bacteria? In this case there was no transformation They found that the non-pathogenic bacteria were transformed into pathogenic bacteria In this case the mice were sickened but did not die They found that some of the protein could cause transformation but other proteins could notarrow_forward
- a) what are restriction enzymes? b) What is the main function of restriction enzymes in nature? c) Compare and contrast the these enzymes in nature and in scientific research.arrow_forwardWhat 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_forwardWhat is a genetically modified organism (GMO)? a. a plant with certain genes removed b. an organism with an artificially altered genome c. a hybrid organism d. any agricultural organism produced by breeding or biotechnologyarrow_forward
- What would happen in the experiment illustrated in Figure if the DNA and RNA that are mixed together came from very different organisms, for example a worm and a pig?arrow_forwardWhat is a cloning vector? A. The DNA probe used to locate a particular gene in the genome. B. An agent such as plasmid, used to transfer DNA from an in vitro solution into a living cell. C. The laboratory apparatus used to clone genes. D. An enzyme that cuts DNA into restriction fragments.arrow_forwardfrederic griffith used the word transformation to describe the changes in bacteria that he observed. which is the most useful definition of transformation?arrow_forward
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