Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Molecular Response to Thyroid Hormones during Metamorphosis
Thyroid hormones can cause obtainable tissues to break down or can remold the tissues to their adult function. The liver cells of the tadpole for instance are not destroyed and replaced during metamorphosis. In place of their structure is remodeled. This change is accompanied by dramatic raise in ribosomal and messenger RNA synthesis. The rate of protein synthesis also increases nearly 100 folds in four hours of thyroid hormone stimulation. Many of the new mRNAs are those that code for new functions of the liver. The main increase in protein synthesis appears to come from the transcription of new m-RNAs.
Carbamoylphosphate synthase (a urea cycle enzyme) is synthesized after the burst of RNA synthesis. Experiments have illustrated three types of molecular response to thyroid hormone. One set of genes increases its low level of transcription in reply to either natural or thyroxine induced metamorphosis. Another set of genes decreases its rate of transcription, whereas a third set of genes remains unaffected by thyroid hormones. Mori and Coworkers (1979) have illustrated that much of the increase in Carbamoylphosphate synthase can be attributed to increased transcription from the gene. So metamorphosis appears to some extent to be controlled at the transcriptional level. Other evidences also indicate the capability of thyroid glands to regulate gene activity at the level of transcription. This does not mean that transcription is the only level of gene regulation, operative during metamorphosis, but it is obviously an important one.
A company is to make a decision on whether or not to purchase a machine to package its product and has asked you to review the information and provide them with answers to some que
In an overview of the major operations planning activities in a typical logistics organization, which of the following activities follows aggregate sales and operations planning? a
A two year sales history by quarter for a seasonal product is given below. Sales Quarter First Year Second Year 1 30 42 2 48 58 3 60 74 4 35 44 a) Using Winter's
When are the holding costs raised? Holding cost rises while the size of order rises. It is since a higher level of average stock will be kept during the year. Thus holding cost
Prepare Paul Jordan''s report to John Smithers using regression analysis. Provide a summary of the cell phone industry outlook as part of Paul''s response.n..
What are the major options for appraisal of employees? Discuss each option, identifying the one that you think is best and why you chose that option
Again, another point I would like to add are the ratings given to each game. During the purchasing process, CanGo has the ability to ask for I.D information to verify age. Sales mi
You are consulting with a company that is failing. It seems the CEO (recently fired) paid no attention to the board of directors. He was also heard to say, "I don't serve stockhold
Your firm designs PowerPoint slides for computer training classes, and you have just received a request to bid on a contract to produce the slides for an 8 session class. From prev
Differentiate between a WorkCentre and a manufacturing cell
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd