Zinc (zn) - micronutrients, Biology

Assignment Help:

Zinc (Zn) - Micronutrients

In its function in some enzyme systems, zn2+ resembles Mn2+ in that it brings about substrate binding and conformational changes in enzymes. A number of enzymes are thus activated in more or less the same way by Mn2+, Mg2+, or zn2+. Zn is actively involved in the N metabolism of the plant.

In Zn deficient plants, protein synthesis and protein levels are markedly lowered, and amino acids and amides accumulate. Zn deficiency affects protein metabolism through the inactivation of RNA polymerase. It affects structural integrity of ribosomes, and enhances RNA degradation by increasing RNase activity. Zn is also required for the synthesis of indole acetic acid from tryptophan.


Related Discussions:- Zinc (zn) - micronutrients

Thalopyta, cherector and economic imoprtance of fungi snd algae

cherector and economic imoprtance of fungi snd algae

Fungal diseases - aspergillosis, F u n g a l diseases A spergill...

F u n g a l diseases A spergillosis Aspergillosis is mycotic disease of poultry and all other species of birds caused by a fungus known as Aspergillus fumigatus . F

Selection of coal, Better coal should have following characteristics (1)...

Better coal should have following characteristics (1)   It should have high calorific value. (2)   It should have low moisture content. (3)   It should have low ash  conte

Determine how nutrition used to prevent dehydration, Determine How Nutritio...

Determine How Nutrition used to Prevent Dehydration? Maintaining optimal hydration status along with sufficient muscle glycogen stores delays the onset of fatigue and enables

Explain pregnancy and diabetes mellitus, Explain Pregnancy and Diabetes Mel...

Explain Pregnancy and Diabetes Mellitus? During pregnancy, a woman who has pre-existing chronic disease requires special care, especially in case of mother's suffering from dia

Define the effect of niacin deficiency on nervous system, Define the effect...

Define the effect of niacin deficiency on Nervous System? Delirium is the most common -mental disturbance in acute pellagra. Dementia is more frequently seen in the chronic cas

Explain nutrient needs and recommended dietary allowances, Explain Nutrient...

Explain Nutrient needs and Recommended Dietary Allowances? For infants and preschoolers, satisfactory growth is a sensitive criterion of whether needs are met. 50 th percentil

What is the external rigid carapace of arthropods called, What is the exter...

What is the external rigid carapace of arthropods called? Of which substance is it made? Which type of organic molecule is that substance? The external carapace of arthropods i

Illustrate nernst equilibrium potential for potassium ions, Illustrate Nern...

Illustrate Nernst equilibrium potential for potassium ions A complete motor neuron is removed from a frog and placed in normal physiological saline at 1 AM.  The neuron is hea

Gonial apospory and somatic apospory, Gonial Apospory and Somatic Apospory ...

Gonial Apospory and Somatic Apospory Gonial Apospory There is no meiosis. The megaspore mother cell enlarges; a small vacuole appears above and below the nucleus. The c

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