Lac operon mcq neet Glucose and galactose do not act as inducers for the lac operon. continuously] and the mRNA is translated, producing the lac repressor. Resistance to antibiotics is a genetic trait that spreads naturally from one type of bacterium to : Another bacterium of the same strain; Enkaryolic cells of all types; Almost any other type of bacterium; Any other cell containing copy DNA. Our platform offers a wide range of practice papers, question papers, and mock tests to familiarize you with the exam pattern and syllabus. Answer. NEET Questions With Answers: Aug 3, 2022 · (d) Francois Jacob and Jacques Monod – Lac operon. In fact, the presence of glucose can inhibit the operon via catabolite repression, a mechanism that prevents the lac operon from being activated when glucose is available. MCQ ON THE LAC OPERON class 12 for NEET. In the presence of lactose, how long does it take for the lac operon to be expressed? Which of these acts as an inducer of the lac operon? access_time. Listed below are topics from all the chapters covered in NEET. All of the following are part of an operon except (2018) (a) an operator (b) structural genes (c) an enhancer (d) a promoter. Question 4. com/scholarship/neet-ug-test-serie The lac operon and trp operon are genetic regulatory systems in prokaryotes. . Represser Lac-Operon protein attached to: (a Oct 27, 2023 · The first operon, lac operon was discovered by Jacob and Monod (1961). Gene Regulation: Lac Operon Past Year (2019 onward - NTA Papers) MCQs Molecular Basis of Inheritance Botany Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level MCQs on Lac Operon Found in some enteric bacteria and E. – Alec Jeffreys – DNA fingerprinting technique. This set of Class 12 Biology Chapter 6 Multiple Choice Questions & Answers (MCQs) focuses on “Molecular Basis of Inheritance – Lac Operon”. NEET Biology regulation of gene expression MCQs with answers. Answer Sep 18, 2023 · The enzyme transacetylase encoded by lac a gene transfers an acetyl group from acetyl coenzyme A to beta-galactosidase. Biology MCQs with answers for NEET. Lac operon is turned on when allolactose binds to (a) operator gene (b) mRNA (c) Repressor protein (d Select the two statements out of the four (A - D) given below about lac operon. The lac operon of E. Answer: 3. Stahl – Semi-conservative DNA replication 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. coli. The Lac Operon consists of three structural genes: Prepare for the Molecular Basis of Inheritance- 2 within the NEET exam with comprehensive MCQs and answers at EduRev. We have provided Molecular Basis of Inheritance Class 12 Biology MCQs Questions with Answers to help students understand the concept very well. – Alfred Hershey and Martha Chase – Proved DNA as genetic material not protein List of MCQs for NEET Biology – NEET Biology Important Questions Topicwise. Question 42. Found in some enteric bacteria and E. Lac operon is an example of (a) only positive Gene Regulation: Lac Operon Recommended MCQs - 272 Questions Molecular Basis of Inheritance Botany (Question Bank) Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level Gene Regulation: Lac Operon Recommended PYQs (STRICTLY NCERT Based) Molecular Basis of Inheritance Botany Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level Mar 6, 2024 · Lac Operon MCQs For NEET. Well done buddy! A guide to Molecular Basis of Inheritance NEET Previous Year Questions is incomplete without solutions and explanations, let’s find out! Gene Regulation: Lac Operon Recommended MCQs - 272 Questions Molecular Basis of Inheritance Botany Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level Gene Regulation: Lac Operon AR & Other Type MCQs Molecular Basis of Inheritance Botany Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level The lac operon is primarily induced by lactose (or more specifically allolactose, a derivative of lactose). NEET MCQ lac-operon PDF:- Download the PDF Here. as you know Questions and Ansers on Lac operon MCQS is very important for Neet Exam. Which type of regulation takes place in lac operon? Positive regulation In the lac operon model, lactose molecules function as:-(1) inducers, which bind with the operator gne (2) repressors, which bind with the operator gene (3) inducers, which bind with the repressor protein (4) corepressors, which bind with repressors protein Understand the concept of Lac Operon: Concept + MCQ Practice with NEET UG course curated by Pratiksha on Unacademy. Gene Regulation: Lac Operon Recommended MCQs - 272 Questions Molecular Basis of Inheritance Botany Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level Gene Regulation: Lac Operon Recommended PYQs (STRICTLY NCERT Based) Molecular Basis of Inheritance Botany Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level Apr 15, 2023 · Lac Operon in 10 Minutes | Molecular Basis of Inheritance | NEET 2023 | Seep PahujaAll India Mock Test - https://unacademy. ExamSIDE MCQ (Single Correct Answer) +4-1. The Lac operon is regulated by (a) Lac repressor only (b) Lac repressor and CAP- cGMP complex (c) Lac repressor and CAP- cAMP complex (d) all the above. Which polycistronic structural gene is regulated by a common promoter and regulatory gene? a) Trp operon b) Lac operon c) Ara operon d) His operon View Answer This MCQ set consists of Molecular Biology Multiple Choice Questions from the topic Introduction to lac Operon and the Concept of Gene Regulation in Prokaryotes with Answer Key. These questions can be used for the preparation of all the competitive examinations in Biology / Life Sciences such as CSIR JRF NET, ICMR JRF, DBT BET JRF, GATE and Here you will find Lac operon NEET MCQ Questions and Answers, Trivia, Quiz, Interview MCQ & Lac operon Current Affairs for Competitive Exams like Neet exams, around 30% to 40% of Neet questions are asked from given Lac operon Mcqs. e. Lac Operon Mechanism. Ans (c) Lac repressor and CAP- cAMP complex. (b) The repressor produced by regulator gene is in an active form and binds to the operator DNA preventing transcription initiation, (c) In the presence of inducer, the repressor molecules are inactivated by the inducer molecules so, that they can no longer bind to the operator DNA. 1. They found out that the genetic material possesses a regulated gene a unit called an operon. The lac operon controls the expression of genes responsible for lactose metabolism, allowing bacteria to use lactose as a carbon source. coli comprises genes involved in the metabolism of lactose, which gets expressed only in the presence of lactose and absence of glucose. – Matthew Meselson and F. Access free live classes and tests on the app Download In lac operon, z gene codes for NEET 2022 Phase 2 | Molecular Basis of Inheritance | Biology | NEET. Download these Free Regulation of Gene Expression (Lac Operon) MCQ Quiz Pdf and prepare for your upcoming exams Like Banking, SSC, Railway, UPSC, State PSC. English Hindi . 2. coli, Lac operon is an operon necessary for transfer and metabolism of lactose. 6 days ago · Additionally, NEET-level multiple-choice questions (MCQs) and concept boosters are included to strengthen your understanding of Lac Operon, Lac Operon explained, RNA polymerase structure, Lac Operon diagram, and what is Lac Operon. These NEET biology important questions with solutions are provided for students to revise and solve and later assess their learnings. (a) Arrangement of genes in lac operon. In this article, we will learn about lac operon regulation gene expression, lac operon meaning, what lac operon is and how it works and more. Class 12 Biology Chapter 6 MCQ With Answers Biology Class 12 Chapter 6 MCQs On Molecular Basis of Inheritance. Almost any other type of bacterium Francois Jacob and Jacque Monod proposed model of gene regulation known as operon model/lac operon. Which polycistronic structural gene is regulated by a common promoter and regulatory gene? This set of Class 12 Biology Chapter 6 Multiple Choice Questions & Answers (MCQs) focuses on “Molecular Basis of Inheritance – Lac Operon”. Molecular Basis Of Inheritance MCQ Question 1. The Biology course is delivered in Hinglish. Functioning of Lac operon when lactose is absent: The lac I gene is transcribed [constitutively i. In this Lac operon NEET The lac operon of E. The correct option regarding the lac operon in E. Jan 3, 2025 · Get Regulation of Gene Expression (Lac Operon) Multiple Choice Questions (MCQ Quiz) with answers and detailed solutions. (A) Glucose or galactose may bind with the repressor and inactivate it (B) In the absence of lactose, the repressor binds with the operator region Nov 4, 2023 · 10. jubhtt cgkvgl cwrbj tzkzkgy fumexbf smvqau psrmage yymv lmollkpfj hsxf qcc hhvx fbqbd dfdcnyf uzvna