Positive and negative regulation, Biology

Assignment Help:

The lac operon is an brilliant example of negative control or negative regulation of gene expression in which they bound repressor stops transcription of the structural genes. The Positive control or positive regulation of gene expression is when the regulatory protein binds to enhances and DNA the rate of transcription.  In that case the regulatory protein is called as an activator.  The CAP or CRP included in regulating the lac operon is a good instance of an activator. Thus the lac operon is subject to both positive and negative control.

 

 


Related Discussions:- Positive and negative regulation

Quick transient responses - behaviour of plants, Quick transient responses ...

Quick transient responses - Behaviour of Plants Such responses are stimulated by factors showing significant variations over relatively small time period e.g., those showing w

Difference between the concepts of food chain and food web, What is the dif...

What is the difference between the concepts of food chain and food web? The chain theory is a theoretical model to study the energy flux in ecosystems. In fact, in an ecosystem

Nutrition - different feeding habits, Different Feeding Habits Feeding ...

Different Feeding Habits Feeding habits of animals depend on the nature of the food consumed. Herbivorous : When plants are eaten. Examples - Horse, cow, rabbit, apes.

What is the importance of vitamin B2, What is the Importance of vitamin b2 ...

What is the Importance of vitamin b2 As a prosthetic group of the flavin enzymes, vitamin B 2 is involved in the reactions of almost all nutrients of plants and animals. They

fat digestion requires two steps, Fat digestion requires two steps? What a...

Fat digestion requires two steps? What are the steps and what enzymes are used to accomplish each step?

Meiosis different from mitosis, All of the following make meiosis different...

All of the following make meiosis different from mitosis, EXCEPT A. Meiosis comprises two separate divisions. B. Meiosis only occurs during embryonic development. C. Chromosome num

Giant nerve fibres, Giant Nerve Fibres We now know that giant nerve f...

Giant Nerve Fibres We now know that giant nerve fibres take place in the central nervous system of many polychaetes, oligochaetes, insects cephalopod etc. They are broader an

Explain dual energy x-ray absorptiometry (dexa), Explain Dual Energy X-ray...

Explain Dual Energy X-ray Absorptiometry (DEXA)? Dual energy X-ray absorptiometry (DEXA) is a relatively new technology that is being identified as a reference method for bo

Illustrate the plant taxonomy, Q. Illustrate the Plant taxonomy? Plant ...

Q. Illustrate the Plant taxonomy? Plant taxonomy has a long history. It gave birth to several phases of botany but remains exciting, interesting and important because there is

Excretory system, extensive note on the excretory system of amphibian

extensive note on the excretory system of amphibian

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd