lac Operon MCQ with Answer Key (Molecular Biology MCQ-04)

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Molecular Biology MCQ on lac Operon – Part 2 (Catabolite Repression)
(Molecular Biology MCQ-04)

(Biology / Life Sciences MCQ: Multiple Choice Questions in Molecular Biology)

(Sample/Model/Practice Questions for CSIR JRF/NET Life Science Examination, ICMR JRF Exam, DBT BET JRF Exam, GATE BT and XL Exam, ICAR JRF NE Exam, PG Entrance Exam, JAM Exam, GS Biology Exam and Medical Entrance Exam)

Welcome to Molecular Biology MCQ-04

This question set on Molecular Biology: lac Operon (Part 2 - Advanced - Catabolite Repression) consists of 15 questions in MCQ format. Please select the correct answer and at the end test, you have to click on 'SUBMIT' button to see your Score and the Correct Answers. 


A network of operons with a common regulator is called:


Allolactose is a disaccharide of D-galactose and D-glucose linked through:


Among the following, which statement is correct about the promoter of a gene?


Lactose permease, the membrane protein which facilitates the transport of lactose from the external medium into the bacterial cell is a:


Isopropyl β-D-1-thiogalactopyranoside (IPTG) used to induce lac operon in molecular biology experiments is:


In a negatively regulated operon the bound repressor will:


The functional lac repressor is a:


The transcription of lac repressor from the lacI gene is:


The number of secondary binding site(s) for the lac repressor in the lac operon is:


The fundamental characteristic of the CRP-cAMP complex and lac repressor in lac operon is:


In the absence of glucose, the binding of CRP-cAMP complex to the region near to the lac promoter will:


The strong induction of lac operon is favoured by:


What will happen when E. coli cells are grown in a medium containing both glucose and lactose?


The lac repressor has which of the following DNA-binding motif?


The absence of which of the following component will deduce the expression of lac structural gene?

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|   lac Operon MCQ Part 1   |   trp Operon MCQ   |

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Biology / Life Sciences MCQ: Molecular Biology MCQ02 on Cell Signaling (Signal Transduction): (Multiple Choice Questions / Model Questions / Sample Questions in Molecular Biology with detailed answer key, explanations and references for preparing CSIR JRF NET Life Science Examination and also for other competitive examinations in Life Science / Biological Science such as ICMR JRF Entrance Exam, DBT BET JRF Exam, GATE (XL) Life Science Exam, GATE (BT) Biotechnology Exam, ICAR JRF Exam, University PG Entrance Exam, JAM Exam, GS Biology Exam, GRE, Medical Entrance Examination etc. This set of practice questions will help to build your confidence in Molecular Biology to face the real examination.

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