Browse by Stream
-
Engineering and Architecture
Exams
Colleges
Predictors
Resources
-
Computer Application and IT
Quick Links
Colleges
-
Pharmacy
Colleges
Resources
-
Hospitality and Tourism
Colleges
Resources
Diploma Colleges
-
Competition
Other Exams
Resources
-
School
Exams
Top Schools
Products & Resources
-
Study Abroad
Top Countries
Student Visas
-
Arts, Commerce & Sciences
Exams
Colleges
Upcoming Events
Resources
-
Management and Business Administration
Exams
Colleges & Courses
Predictors
-
Learn
Online Courses
Engineering Preparation
Medical Preparation
-
Online Courses and Certifications
Top Streams
Specializations
- Digital Marketing Certification Courses
- Cyber Security Certification Courses
- Artificial Intelligence Certification Courses
- Business Analytics Certification Courses
- Data Science Certification Courses
- Cloud Computing Certification Courses
- Machine Learning Certification Courses
- View All Certification Courses
Resources
-
Medicine and Allied Sciences
Colleges
Predictors
Resources
-
Law
Resources
Colleges
-
Animation and Design
Predictors & Articles
Colleges
Resources
-
Media, Mass Communication and Journalism
Exams
Colleges
Resources
-
Finance & Accounts
Top Courses & Careers
Colleges
Get Answers to all your Questions
Below are two statements:
Statement I: In an E. coli cell, lac operon activity must be low.
Statement II: Lactose is transported into bacteria by the permease enzyme.
Based on the above statements, select the most appropriate answer.
Option: 1
Statements I and II are both correct
Option: 2
Statements I and II are both incorrect
Option: 3
Statement I is correct but Statement II is incorrect
Option: 4
Statement I is incorrect but Statement II is correct
Answers (1)
- Without glucose, Lactose serves as an alternate Carbon source. Hence, Statement I is correct.
- However, Lactose transport into the E. coli cell requires a permease enzyme, which is controlled by the lac operon.
- Therefore, a low level of lac operon activity is necessary for E.coli cells at all times making Statement II a correct statement.
- Three genes make up the lac operon, a polycistronic structural gene:
- The 'z' code represents β-galactosidase
- The 'y' code represents Permease
- The 'a' code represents a Transacetylase
- Lactose can enter E. coli cells with the Permease enzyme, which increases permeability.
- Hence, option 1 is the correct answer.
View full answer
NEET 2024 Most scoring concepts
- Just Study 32% of the NEET syllabus and Score up to 100% marks
Similar Questions
Trending Articles/News
Latest Question
- A sum of money under compound interest doubles itself in 4 years. In how many years will it become 16 times itself? Option: 1 1
- A certain loan amounts, under compound interest, compounded annually earns an interest of Rs.1980 in the second year and Rs.2178 in the third year. How much interest did it earn in the first year?
