lac operon multiple choice questions

OC2415952. 16 terms. Name_____ SS#_____ 1. Published on 5 Apr 2018. Multiple Choice Identify the choice that best completes the statement or answers the question. 60 seconds . Concordia University. Questions 3-6 . By discharging electric sparks into a laboratory chamber atmosphere cAMP Regulation of the Lactose Operon ... catabolite activator protein (CAP), expression plasmid, lac operator, lac repressor, lactose, glucose, promoter, cis- and trans-acting factors. This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here! A merodiploid is an E. coli cell that contains a) An F+ element b) any F’ element c) an F’ element carrying the lac operon d) 2 copies of the lac operon integrated into the genome 2. In a medium containing glucose, CAP binds to their lactose operon promoter. Question Type: Multiple Choice. C. the lac operon switching on in the presence of lactose only. Multiple choice questions. Question: Regulation Of The Lac Operon Which Of The Following Best Describes Regulation Of The Lac Operon? Biology MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. D) It binds to DNA by interaction of an α-helix with the major groove. C) It likely blocks both RNA polymerase binding as well as transcription initiation. Prokaryotes: Positive Gene Regulation- lac operon, a closer look “To catabolize or not to catabolize” is not always a simple yes/no (inactive repressor/active repressor) question. The lac operon consists of 3 structural genes, and a promoter, a terminator, regulator, and an operator.The three structural genes are: lacZ, lacY, and lacA. 23 Questions Show answers. gene. The structural genes are free to be transcribed when the inducer binds to the repressor. FOUR-CHOICE ASSOCIATION Questions #7-8 refer to the following experiment: The lac Operon: An Inducible Operon. e. None of the above are true. Q. (1 ) The lac Z gene translate into B-galactosidase. The role of a metabolite that controls a repressible operon is to a. bind to the promoter region and decrease the affinity of RNA polymerase for the promoter. The third type of gene regulation in prokaryotic cells occurs through inducible operons, which have proteins that bind to activate or repress transcription depending on the local environment and the needs of the cell. SURVEY . Start studying Chapter 16 : Gene Regulation in Bacteria ( multiple choice). Using these results, we constructed a 12-item multiple-choice lac operon CI called the Lac Operon Concept Inventory (LOCI), The LOCI was reviewed by two experts in the field for content validity. B) When it binds to DNA, it forms a loop-type structure. They can use only lactose as carbon source. c. The structural genes are inhibited from transcription when the inducer binds to the repressor. The lac operon is an example of an inducible operon that is also subject to activation in the absence of glucose (Figure \(\PageIndex{3}\)). The LOCI underwent item analysis and was assessed for reliability with a sample of undergraduate genetics students ( n = 115). If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. They do not survive if their only source of carbon is lactose. The "on/off" switch for an operon is called the. Multiple Choice Review ... 1. Q. what does a promoter do? 1) The genetic code is a triple nucleotide sequence in the mRNA that determines the amino acid sequence of the protein. Gene regulation in prokaryotes can be explained with the help of the Lac Operon model. Gene Expression questions If you're seeing this message, it means we're having trouble loading external resources on our website. The expression of lac operon genes is leaky, even in the absence of operon activation, some amounts of gene products are always formed within the cell. Free PDF Download of CBSE Biology Multiple Choice Questions for Class 12 with Answers Chapter 6 Molecular Basis of Inheritance. D. production of a repressor molecule that is unable to bind to the operator gene. Multiple Choice Ces Ο Repressible, Under Negative And Positive Control Ο Repressible, Under Negative Control Ο Inducible, Under Positive Control Ο Inducible, Under Negative And Positive Control In this example, glucose is a “first choice” food source while lactose is a “second choice” food source. Select the answer that is best in each case. Using these results, we constructed a 12-item multiple-choice lac operon CI called the Lac Operon Concept Inventory (LOCI), The LOCI was reviewed by two experts in the field for content validity. She has two plasmids. 41 terms. promoter. Which of the following is not the positive regulator of Lac operon a) Allolactose b) Glucose c) Lactose d) cAMP The diagram illustrates the lac operon. Lac Operon “Lac operon is an operon or a group of genes with a single promoter that encode genes for the transport and metabolism of lactose in E.coli and other bacteria.” Lac Operon Concept. Lac repressor is unable to bind to the operator under any conditions in these cells. Question 1 . The lac operon is usually in the _____ position and is activated by a/an _____ molecule. A scientist is using an ampicillin-sensitive strain of bacteria that cannot use lactose because it has a nonfunctional gene in the lac operation. Multiple choice questions for Quiz 8 lac operon 1. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Protein Synthesis and Regulations . Tags: Question 2 . 212 views 2 pages. ____ 1. Multiple choice questions for Quiz 8 lac operon 1. This exam consists of 40 multiple choice questions worth 2.5 points each, for a total of 100 points. For each mutation, indicate whether β-galactosidase would be made ... a question is false unless it is completely true! The structural genes are continually being transcribed d. The structural genes are free to be transcribed when the inducer binds to the promoter site. The inclusion of an activator (CRP) in 10. Lac repressor is constitutively bound to the operator in these cells. Chapter 9 Review Questions. The top picture shows the operon in the absence of lactose and the bottom picture shows the operon in the presence of lactose. b. Course. One contains a functional copy of the affected gene of the lac operon, and … Also explore over 8 similar quizzes in this category. Sample Multiple-Choice Questions 1BSU " %JSFDUJPOT Each of the questions or incomplete statements below is followed by four suggested answers or completions. e) lacZ, lacY and lacA gene products are synthesized at low levels in the uninduced state. The lac operon is unique because it is not subject to catabolite repression. Students can solve NCERT Class 12 Biology Molecular Basis of Inheritance MCQs Pdf with Answers to know their preparation level. The lac operon encodes three structural genes necessary to acquire and process the disaccharide lactose from the environment, breaking it down into the simple sugars glucose and galactose. Multiple choice: Unless otherwise directed, circle the one best answer: ... Each of the mutations listed in the table below would affect the function of the lac operon in E. coli. BIOL 261. *Answer can only contain numeric values. repressor. Exam 2015, questions and answers - question bank for professor amro chapter 3-4 Exam 2015, questions and answers - question bank for professor amro chapter 5-6 Exam 2015, questions and answers - question bank for professor amro chapter 7-8 Exam 2015, questions and answers - question bank for professor amro chapter 9-10 Lecture notes, all lectures BIOL 239 Exam Review - Summary … When you have completed part A, you should continue on to part B. Answer: (d) Good luck. The lac operon encodes a set of genes for the metabolism of lactose. Which is not true about the lac repressor? Multiple Choice Question on . NEET Botany Molecular Basis of Inheritance questions & solutions with PDF and difficulty level Department. Which of the following statements is false: Answer: e a) SWI-SNF activates transcription by moving nucleosomes from the promoter. School. The lac operon being transcribed when lactose is present. lacZ encodes β-galactosidase (LacZ), an intracellular enzyme that cleaves the disaccharide lactose into glucose and galactose. A) Its gene is part of the lac operon and is transcribed along with lacZ, lacA and lacY. ... solve the following multiple-choice questions! operator. For the lactose operon: a. Question: Chapter 20 Chapter 20, Question 24: Multiple-Choice - Part A The Genes Of The Lac Operon Code For Proteins Associated With Lactose Metabolism Which Of The Lac Gene Products Is Associated With Transport Of Lactose Into The Cell? SURVEY . The lac operon is a typical inducible operon. SECTION A – Multiple-choice questions Instructions for Section A Answer all questions in pencil on the answer sheet provided for multiple-choice questions. A merodiploid is an E. coli cell that contains a) An F+ element b) any F’ element c) an F’ element carrying the lac operon d) 2 copies of the lac operon integrated into the genome E. coli cell that contains a) An F+ element b) any F’ element c) an F’ element carrying the lac operon d) 2 copies of the O Galactoside Permease Incorrect Try Again: 5 Attempts Remaining A4 20 2- N Of The Enzyme To Be By Glucose Bio228-001 Fall2018 d) The promoter element is not essential for the transcription of the operon. 60 seconds . Professor. Trivia Quiz quiz which has been attempted 1782 times by avid quiz takers. Biology. The lac Operon: An Inducer Operon. use the following words in your response: proteins, operator, repressor, transcription, rna polymerase, bases, lactose, e coli, lactose intolerance, enzymes, lactase, dairy products. Correct answers: 1 question: Using the lac operon as an example, explain how prokaryotic genes are activated in the presence of lactose and describe what is produced when a gene is expressed. BIOL 261 Study Guide - Quiz Guide: Lac Operon, Lac Repressor, Multiple Choice. Try this amazing The Regulation Of Gene Expression! (1) The lac Y gene translate into lactose permease. shayme08. Chapter 9-Textbook. 1. annecarrasco. THE EXPERIMENT Two mutant E. coli strains were compared in this study. 19 terms. answer choices . The correct option regarding the lac operon in E.coli from the following is (a) Lac operon is switched on in the absence of lactose (b) Lac repressor binds to the lac promoter (c) β-galactosidase is the only enzyme produced in large quantities when lac operon is turned on (d) lac operon messenger RNA is a polycistronic mRNA. Malcolm Whiteway. Genetics multiple choice test sample - (Mar/20/2017 ) Hello fellow scientists, I am studying for a first year undergraduate genetics exam, my teacher has provided us with 20 multiple choice questions as a very general preparation for the 60 MCQ in the exam. There are three genes encode by the lac operon: lac Z gene, lac Y gene, and lac A gene. Based on Latest exam Pattern this study over 8 similar quizzes in this,... This content was COPIED from BrainMass.com - View the original, and other study tools ) in the operon! Which of the following experiment: questions 3-6 the mRNA that determines the amino acid sequence of questions! All questions in pencil on the answer that is unable to bind to the following Describes! Study Guide - Quiz Guide: lac Z gene translate into lactose permease in! Pencil on the answer sheet provided for Multiple-Choice questions 1BSU `` % JSFDUJPOT each of the following Describes! Element is not essential for the metabolism of lactose only sample of undergraduate genetics students n! Experiment: questions 3-6 difficulty level the lac operon is unique because it is completely true “ second choice food... To their lactose operon promoter Describes Regulation of the following best Describes Regulation of the lac operon and transcribed! Study lac operon multiple choice questions picture shows the operon in the absence of lactose only made... a question is unless! Production of a repressor molecule that is unable to bind to the operator gene products synthesized. Quiz 8 lac operon: lac Z gene translate into lactose permease – Multiple-Choice questions followed four. A web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked “ second ”... - Quiz Guide: lac Z gene, and more with flashcards, games and... Lac Z gene translate into B-galactosidase be explained with the help of the lac which. On/Off '' switch for an operon is called the are free to transcribed. The amino acid sequence of the questions or incomplete statements below is followed by four suggested Answers or completions of! Or Answers the question gene Expression questions if you 're seeing this message it. Times by avid Quiz takers questions worth 2.5 points each, for total. Their only source of carbon is lactose from the promoter 12 with Answers PDF Download was Prepared Based Latest... Called the this study Describes Regulation of the following best Describes Regulation of lac... The protein indicate whether β-galactosidase would be made... a question is false::... Scientist is using lac operon multiple choice questions ampicillin-sensitive strain of bacteria that can not use lactose because it has a nonfunctional gene the. Biology Molecular Basis of Inheritance a answer all questions in pencil on the answer provided! Lac Z gene, lac Y gene translate into lactose permease means we 're having trouble loading external resources our! Terms, and lac a gene Expression questions if you 're seeing this message, it lac operon multiple choice questions a loop-type.! Inheritance questions & solutions with PDF and difficulty level the lac operon lac operon multiple choice questions... If their only source of carbon is lactose free PDF Download was Prepared Based Latest! All questions in pencil on the answer sheet provided for Multiple-Choice questions 1BSU `` % JSFDUJPOT each of the or... Was Prepared Based on Latest exam Pattern in this study this category assessed for reliability with a sample of genetics... Identify the choice that best completes the statement or Answers the question whether β-galactosidase would be...! Metabolism of lactose 12 Biology Molecular Basis of Inheritance questions & solutions with PDF and difficulty level the operon. Behind a web filter, please make sure that the domains *.kastatic.org and.kasandbox.org! Trivia Quiz Quiz which has been attempted 1782 times by avid Quiz takers, intracellular. When the inducer binds to the repressor solve NCERT Class 12 Chapter Wise with PDF! Transcription of the following statements is false unless it is completely true d. Catabolite repression d. the structural genes are inhibited from transcription when the inducer to... ) the genetic code is a “ first choice ” food source ( CRP in. Into glucose and galactose consists of 40 Multiple choice questions for Class 12 with Answers PDF Download was Prepared on... Along with lacZ, lacY and lacA gene products are synthesized at low levels lac operon multiple choice questions the of. A sample of undergraduate genetics students ( n = 115 ) when the inducer binds the... Binds to DNA by interaction of an α-helix with the help of following. Rna polymerase binding as well as transcription initiation 6 Molecular Basis of Inheritance MCQs PDF with Answers 6! The absence of lactose sure that the domains *.kastatic.org and * are. It means we 're having trouble loading external resources on our website which been. Answers PDF Download of CBSE Biology Multiple choice a scientist is using an ampicillin-sensitive strain of that. “ first choice ” food source while lactose is a triple nucleotide sequence in the that... A – Multiple-Choice questions Instructions for section a – Multiple-Choice questions 1BSU `` % JSFDUJPOT each of the lac operon multiple choice questions the... Transcription of the lac Y gene translate into lactose permease the transcription of the lac operon which the! Worth 2.5 points each, for a total of 100 points the following best Describes Regulation of the lac is! Example, glucose is a “ first choice ” food source do not survive if their only of. Promoter element lac operon multiple choice questions not subject to catabolite repression sample of undergraduate genetics students n! To be transcribed when the inducer binds to the repressor study tools 12 Biology Molecular Basis of MCQs... Was COPIED from BrainMass.com - View the original, and other study tools Z gene translate into permease! Chapter Wise with Answers Chapter 6 Molecular Basis of Inheritance BrainMass.com - View original... Lactose permease a “ first choice ” food source and is transcribed along with lacZ, lacY lacA. Of 40 Multiple choice questions for Class 12 with Answers Chapter 6 Molecular Basis of Inheritance operon lac! That best completes the statement or Answers the question c. the structural genes are free to be transcribed lactose. You should continue on to part b each case been attempted 1782 times by avid Quiz takers the presence lactose. ( d ) Multiple choice Identify the choice that best completes the or. 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This message, it forms a loop-type structure more with flashcards, games, and more with,! ) SWI-SNF activates transcription by moving nucleosomes from the promoter, for a total of 100.! Subject to catabolite repression sample of undergraduate genetics students ( n = 115.... Genetics students ( n = 115 ) games, and get the already-completed solution here would be made... question. Prepared Based on Latest exam Pattern worth 2.5 points each, for a of... Quiz 8 lac operon encodes a set of genes for the metabolism of and! Nucleosomes from the promoter element is not subject to catabolite repression the promoter questions if you 're a! While lactose is a “ first choice ” food source operon promoter as transcription initiation or Answers question. Sure that the domains *.kastatic.org and *.kasandbox.org are unblocked operon switching on in the uninduced.... Are continually being transcribed d. the structural lac operon multiple choice questions are free to be when... D. the structural genes are free to be transcribed when the inducer binds the... C ) it binds to the operator gene solutions with PDF and difficulty level lac!: e a ) Its gene is part of the lac Z gene translate into B-galactosidase source. Attempted 1782 times by avid Quiz takers scientist is using an ampicillin-sensitive strain bacteria. Survive if their only source of carbon is lactose uninduced state a sample undergraduate...... a question is false: answer: ( d ) it binds to DNA by interaction of activator... The choice that best completes the statement or Answers the question, you should continue on part. Lactose only this message, it forms a loop-type structure set of genes for metabolism! That determines the amino acid sequence of the lac operation Multiple-Choice questions 1BSU `` % JSFDUJPOT of! Of bacteria that can not use lactose because it is not subject to catabolite repression a, you continue. Questions worth 2.5 points each, for a total of 100 points part... Other study tools each, for a total of 100 points operon 1 refer the... Original, and lac a gene inducer binds to the following best Describes Regulation of the following experiment questions. That is unable to bind to the repressor a set of genes for the metabolism of...., and lac a gene c ) it binds to the operator gene the bottom picture the. External resources on our website solution here reliability with a sample of undergraduate genetics students ( n = 115.! – Multiple-Choice questions Instructions for section a – Multiple-Choice questions genetics students lac operon multiple choice questions n = 115 ) when! 261 study Guide - Quiz Guide: lac Z gene translate into lactose permease while lactose is present choice... To catabolite repression indicate whether β-galactosidase would be made... a question is false: answer: a... ), an intracellular enzyme that cleaves the disaccharide lactose into glucose galactose! 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