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 manufacturing company sells its products directly to customers and operates 5 days a week, 52 weeks a year. The production department of this company can produce at the rate of 6
Characteristics of Batch Production Short Runs: Batch production is characterized by short production runs and frequent changes in set ups. Investment : Needs high in
1. Define productivity both as a mathematical ratio and as a systems diagram? 2. Outline how the productivity of an organisation may be improved. 3. Discuss the factors aff
Briefly explain the situational influences on organizational design
A manager just received a new price list from a supplier. It will now cost $1.00 a box for order quantities of 801 or more boxes, $1.10 a box for 200 to 800 boxes, and $1.20 a box
Why is exporting the most popular initial entry method?
The Cardinal Electronics Company must project the sales of cellular phones for the next year (called year 2). The number of cell phones sold by Cardinal Electronics in each of the
Operations Mgmt. 10th edition Hiezer/Render Heather Adams, production manager for a Colorado exercise equipment manufacturer, needs to schedule an order for 50 UltimaSteppers, whic
A college professor told her students, "The purpose of a management course is to teach students about management, not to teach them to be managers." Do you agree or disagree with t
Fitzgerald Model - Performance Measures The Fitzgerald model is a performance measurement system specifically for service industry. Fitzgerald (1991) describes a feedback/feed
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