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Multiple choice questions for Quiz 8 lac operon 1. Question 1 . ____ 1. 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. Sample Multiple-Choice Questions 1BSU " %JSFDUJPOT Each of the questions or incomplete statements below is followed by four suggested answers or completions. Answer: (d) The inclusion of an activator (CRP) in Questions 3-6 . Free PDF Download of CBSE Biology Multiple Choice Questions for Class 12 with Answers Chapter 6 Molecular Basis of Inheritance. In this example, glucose is a “first choice” food source while lactose is a “second choice” food source. Question: Regulation Of The Lac Operon Which Of The Following Best Describes Regulation Of The Lac Operon? The LOCI underwent item analysis and was assessed for reliability with a sample of undergraduate genetics students ( n = 115). 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 is unique because it is not subject to catabolite repression. Gene regulation in prokaryotes can be explained with the help of the Lac Operon model. Department. Which is not true about the lac repressor? Lac repressor is constitutively bound to the operator in these cells. She has two plasmids. 60 seconds . BIOL 261. For each mutation, indicate whether β-galactosidase would be made ... a question is false unless it is completely true! THE EXPERIMENT Two mutant E. coli strains were compared in this study. operator. 19 terms. 1. 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. 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. The structural genes are free to be transcribed when the inducer binds to the repressor. Multiple choice questions for Quiz 8 lac operon 1. 1) The genetic code is a triple nucleotide sequence in the mRNA that determines the amino acid sequence of the protein. There are three genes encode by the lac operon: lac Z gene, lac Y gene, and lac A gene. 10. Multiple choice questions. Biology MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. Which of the following statements is false: Answer: e a) SWI-SNF activates transcription by moving nucleosomes from the promoter. SECTION A – Multiple-choice questions Instructions for Section A Answer all questions in pencil on the answer sheet provided for multiple-choice questions. Malcolm Whiteway. 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. Biology. Concordia University. gene. The lac operon being transcribed when lactose is present. Questions #7-8 refer to the following experiment: Start studying Chapter 16 : Gene Regulation in Bacteria ( multiple choice). Professor. 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. shayme08. OC2415952. This exam consists of 40 multiple choice questions worth 2.5 points each, for a total of 100 points. answer choices . Select the answer that is best in each case. Course. They can use only lactose as carbon source. Try this amazing The Regulation Of Gene Expression! 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 … Q. what does a promoter do? Chapter 9 Review Questions. cAMP Regulation of the Lactose Operon ... catabolite activator protein (CAP), expression plasmid, lac operator, lac repressor, lactose, glucose, promoter, cis- and trans-acting factors. When you have completed part A, you should continue on to part B. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. ... solve the following multiple-choice questions! repressor. School. Protein Synthesis and Regulations . Name_____ SS#_____ 1. BIOL 261 Study Guide - Quiz Guide: Lac Operon, Lac Repressor, Multiple Choice. (1) The lac Y gene translate into lactose permease. The structural genes are continually being transcribed d. The structural genes are free to be transcribed when the inducer binds to the promoter site. They do not survive if their only source of carbon is lactose. A scientist is using an ampicillin-sensitive strain of bacteria that cannot use lactose because it has a nonfunctional gene in the lac operation. Gene Expression questions If you're seeing this message, it means we're having trouble loading external resources on our website. B) When it binds to DNA, it forms a loop-type structure. In a medium containing glucose, CAP binds to their lactose operon promoter. e) lacZ, lacY and lacA gene products are synthesized at low levels in the uninduced state. Q. Multiple Choice Identify the choice that best completes the statement or answers the question. Trivia Quiz quiz which has been attempted 1782 times by avid quiz takers. annecarrasco. The lac Operon: An Inducer Operon. Chapter 9-Textbook. (1 ) The lac Z gene translate into B-galactosidase. 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. SURVEY . The lac operon is an example of an inducible operon that is also subject to activation in the absence of glucose (Figure \(\PageIndex{3}\)). FOUR-CHOICE ASSOCIATION 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. promoter. 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. Gene is part of the lac Z gene, lac repressor, Multiple choice Identify the choice that completes... By four suggested Answers or completions the metabolism of lactose only from BrainMass.com - View the original, get... And was assessed for reliability with a sample of undergraduate genetics students ( n = 115 ) is along. Transcription by moving nucleosomes from the promoter element is not subject to catabolite repression operon the. Questions or incomplete statements below is followed by four suggested Answers or.! 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