EBK BROCK BIOLOGY OF MICROORGANISMS
15th Edition
ISBN: 8220103633352
Author: Stahl
Publisher: PEARSON
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Chapter 4, Problem 2AQ
Compare and contrast the activity of DNA and RNA polymerases. What is the function of each? What are the substrates of each? What is the main difference in the behavior of the two polymerases?
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Chapter 4 Solutions
EBK BROCK BIOLOGY OF MICROORGANISMS
Ch. 4.1 - What is a genome and what is it composed of? What...Ch. 4.1 - Define the terms complementary and antiparallel as...Ch. 4.1 - Why is supercoiling essential to a bacterial cell?...Ch. 4.1 - Describe the central dogma of molecular biology....Ch. 4.2 - Approximately how large is the Escherichia coli...Ch. 4.2 - Prob. 2MQCh. 4.2 - Prob. 3MQCh. 4.2 - Prob. 1CRCh. 4.3 - Prob. 1MQCh. 4.3 - To which end (5 or 3) of a newly synthesized...
Ch. 4.3 - Prob. 3MQCh. 4.3 - What are the functions of DNA Pol I and III and...Ch. 4.3 - What is meant by the term semiconservative...Ch. 4.4 - Prob. 1MQCh. 4.4 - Prob. 2MQCh. 4.4 - Prob. 3MQCh. 4.4 - Prob. 1CRCh. 4.5 - What enzyme catalyzes transcription? What is a...Ch. 4.5 - Prob. 2MQCh. 4.5 - Prob. 3MQCh. 4.5 - Prob. 4MQCh. 4.5 - Prob. 1CRCh. 4.6 - What three major components make up an archaeal...Ch. 4.6 - Prob. 2MQCh. 4.6 - Prob. 3MQCh. 4.6 - How does the archaeal RNA polymerase differ from...Ch. 4.7 - Prob. 1MQCh. 4.7 - Differentiate between the different classes of...Ch. 4.7 - Prob. 3MQCh. 4.7 - Describe the two types of secondary structure a...Ch. 4.8 - Prob. 1MQCh. 4.8 - What is the function of the acceptor stem of a...Ch. 4.8 - Prob. 3MQCh. 4.8 - Prob. 1CRCh. 4.9 - Prob. 1MQCh. 4.9 - Prob. 2MQCh. 4.9 - Prob. 3MQCh. 4.9 - Why is the genetic code a degenerate code? What is...Ch. 4.10 - What are the components of a ribosome? What...Ch. 4.10 - How is a completed polypeptide chain released from...Ch. 4.10 - How does tmRNA free stalled ribosomes?Ch. 4.10 - Where on the ribosome do tRNAs bind, and what is...Ch. 4.11 - What are molecular chaperones and why are they...Ch. 4.11 - What macromolecules are protected by heat shock...Ch. 4.11 - How do chaperones assist the Escherichia coli cell...Ch. 4.11 - What proteins are involved in refolding misfolded...Ch. 4.12 - Prob. 1MQCh. 4.12 - Prob. 2MQCh. 4.12 - Prob. 3MQCh. 4.12 - Prob. 1CRCh. 4.13 - Prob. 1MQCh. 4.13 - Prob. 2MQCh. 4.13 - Prob. 3MQCh. 4.13 - Prob. 1CRCh. 4 - The genome of the bacterium Neisseria gonorrhoeae...Ch. 4 - Compare and contrast the activity of DNA and RNA...Ch. 4 - What would be the result (in terms of protein...
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- During high stress environments, it has been found that some bacteria activate a genetic mechanism that allows them to incorporate more mutations into the DNA during replication. Would the following two enzymes be impacted by such a mechanism? In each case, provide a reason for your answer. i) DNA polymerase III ii) Helicasearrow_forwardDraw the reaction between a growing strand of RNA and the next nucleotide added. Clearly show the interaction between the template DNA and the rNTP and draw arrows to indicate the reaction that occurs. How does this compare to what occurs in DNA polymerization?arrow_forwardWhich of the following statements regarding Nucleotide Excision Repair (NER) and Base Excision Repair (BER) is true? Only NER involves the action of DNA ligase to seal nicks in the DNA backbone. Both NER and BER involve DNA strand cleavage by an endonuclease. Both NER and BER can be activated by exposure to visible light. Only BER requires DNA polymerase. Both NER and BER involve the creation of an apyrimidinic (AP) site.arrow_forward
- Use the first picture for to answer the following questions.arrow_forwardWhat is the difference between DNA polymerase and RNA polymerase?arrow_forwardWhich of the following statements regarding Nucleotide Excision Repair (NER) and Base Excision Repair (BER) is true? Only NER involves the action of DNA ligase to seal nicks in the DNA backbone. Both NER and BER involve the creation of an apyrimidinic (AP) site. Both NER and BER involve a single DNA strand cleavage by an endonuclease. Only BER requires DNA polymerase. Both NER and BER can be activated by exposure to visible light.arrow_forward
- What enzymatic features of DNA polymerase prevent it from replicating one of the DNA strands at the ends of linear chromosomes? Compared with DNA polymerase, how is telomerase different in its ability to synthesize a DNA strand? What does telomerase use as its template for the synthesis of a DNA strand? How does the use of this template result in a telomere sequence that is tandemly repetitive?arrow_forwardWhat is generated from the replication of DNA ? what method is used ? Describe the process. What are Okazaki fragments? What enzymes are used ?arrow_forwardIt was once thought that the DNA polymerase machinery moves along DNA in a manner analogous to a train on a track. Current evidence indicates that the polymerizing machinery is instead stationary and that the DNA strands are pumped through the complex. What advantages does this stationary mechanism have?arrow_forward
- Which of the followings statements are true about DNA polymerase? 1.) It can only go in one direction, meaning the lagging strand can't be synthesized continuously. 2.) It cannot start a DNA strand from scratch, so another enzyme is needed to create "primers" as a starting point. 3.) It cannot copy epigenetic marks (such as methyl groups) on its own; these must be "copied" onto the daughter DNA strand by other enzymes after DNA replication. 4.) All of the abovearrow_forwardIntroduction: The enzyme deoxyribonuclease I (DNase I) is an endonuclease that hydrolyzes the phosphodiester bonds of the double-stranded DNA backbone to yield small oligonucleotide fragments. DNase I is used therapeutically to treat patients with cystic fibrosis (CF). The DNase I enzyme is inhaled into the lungs where it then acts upon the DNA contained in the viscous sputum secreted by the lungs in these patients. Hydrolysis of high molecular weight DNA to low molecular weight DNA in the sputum decreases its viscosity and improves lung function. Animal studies have shown that DNase I is also effective in treating the autoimmune disease systemic lupus erythematosus (SLE). In this disease, the DNA secreted into the serum provokes an immune response. DNase I prevents the immune response by degrading the DNA to smaller fragments that are not recognized by the immune system. Genentech, Inc., the company that produces the recombinant DNase I, was interested in improving the efficiency of…arrow_forwardIntroduction: The enzyme deoxyribonuclease I (DNase I) is an endonuclease that hydrolyzes the phosphodiester bonds of the double-stranded DNA backbone to yield small oligonucleotide fragments. DNase I is used therapeutically to treat patients with cystic fibrosis (CF). The DNase I enzyme is inhaled into the lungs where it then acts upon the DNA contained in the viscous sputum secreted by the lungs in these patients. Hydrolysis of high molecular weight DNA to low molecular weight DNA in the sputum decreases its viscosity and improves lung function. Animal studies have shown that DNase I is also effective in treating the autoimmune disease systemic lupus erythematosus (SLE). In this disease, the DNA secreted into the serum provokes an immune response. DNase I prevents the immune response by degrading the DNA to smaller fragments that are not recognized by the immune system. Genentech, Inc., the company that produces the recombinant DNase I, was interested in improving the efficiency of…arrow_forward
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