The role of cyclicAmp in lac open? A-positive control,b-magnetic control, c-negetive control
cyclic AMP or cAMP is involved in the positive regulation of the lac operon. In an environment with a low glucose concentration, cAMP accumulates and binds to the allosteric site on CRP (cAMP receptor protein), a transcription activator protein. The protein assumes its active shape and binds to a specific site upstream of the lac promoter, making it easier for RNA polymerase to bind to the adjacent promoter to start transcription of the lac operon, increasing the rate of lac operon transcription. With a high glucose concentration, the cAMP concentration decreases, and the CRP disengages from the lac operon.
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
You have rated this answer /10
Browse free questions and answers by Chapters
- 1 Biomolecules
- 2 Cell : The Unit of Life
- 3 Respiration in Plants
- 4 Animal Kingdom
- 5 Evolution
- 6 Ecosystem
- 7 The Living World
- 8 Biological Classification
- 9 Reproduction in Organisms
- 10 Sexual Reproduction in Flowering Plants
- 11 Human Reproduction
- 12 Reproductive Health
- 13 Principles of Inheritance and Variation
- 14 Molecular Basis of Inheritance
- 15 Biotechnology : Principles and Processes
- 16 Biotechnology and its Applications
- 17 Human Health and Disease
- 18 Microbes in Human Welfare
- 19 Strategies for Enhancement in Food Production
- 20 Organisms and Populations
- 21 Biodiversity and Conservation
- 22 Environmental Issues
- 23 Plant Kingdom
- 24 Morphology of Flowering Plants
- 25 Anatomy of Flowering Plants
- 26 Structural Organisation in Animals
- 27 Cell Cycle and Cell Division
- 28 Mineral Nutrition
- 29 Photosynthesis in Higher Plants
- 30 Plant Growth and Development
- 31 Digestion and Absorption
- 32 Breathing and Exchange of Gases
- 33 Body Fluids and Circulation
- 34 Excretory Products and their Elimination
- 35 Locomotion and Movement
- 36 Neural Control and Coordination
- 37 Chemical Coordination and Integration
- 38 Transport in Plants