Guanotelism - excretion, Biology

Assignment Help:

Guanotelism - Excretion

Arachnids (spiders and scorpions) excrete mostly guanine and hence are said to be guanotelic. Guanine, like uric acid, is relatively non-toxic and insoluble and is excreted in solid form. It is an adaptation to life in arid habitats. It is also a purine and has the same atoms in its ring structure as in uric acid.

In fact, guanine is formed as an intermediate during uric acid synthesis in uricotelic animals. In spiders and scorpions, the inosinic acid pathway terminates in guanine formation. The origin of the four nitrogen atoms of guanine is similar to that of uric acid.


Related Discussions:- Guanotelism - excretion

Carrier protein in a plasma membrane, What is a characteristic feature of a...

What is a characteristic feature of a carrier protein in a plasma membrane? Carrier proteins are globular proteins which are particular it their action and therefore regulate t

Explain dose-scaling, Dose-scaling Toxicological equivalent doses in a...

Dose-scaling Toxicological equivalent doses in animals and humans are a debatable issue. The Joint FAOIWHO Expert Committee on Food Additives (JECFA) and Joint FA01 WHO Meetin

Define body composition - geriatric nutrition, Define Body Composition - Ge...

Define Body Composition - Geriatric Nutrition? After 30 years of age 1-2% decline in lean body mass annually is observed. The total body water, bone mass and lean body mass

Create a standard curve, Explain how you would create a standard curve to d...

Explain how you would create a standard curve to determine the amount of orange dye that had been added to a can of orange soda

Eye drops, Eye Drops Medication is instilled in the form of drops or ...

Eye Drops Medication is instilled in the form of drops or ointment.   Purpose To dilate pupil e.g. Atropine 1 per cent, drosyn 5 per cent or 10 per cent  To c

Hemerythrins - respiratory pigments, Hemerythrins - Respiratory Pigments ...

Hemerythrins - Respiratory Pigments The Hemerythrins are rather rare. They take place in some animals belonging to the minor phyla like the sipunculid worms, some brachiopods,

Explain retrograde peri-implantitis, What is retrograde peri-implantitis? ...

What is retrograde peri-implantitis? Retrograde peri-implantitis has been described by Misch as implant failure probably due to bone microfractures caused by premature implant

How are a hypothesis and an experiment related, How are a hypothesis, a pre...

How are a hypothesis, a prediction, and an experiment related? A prediction is a statement made in advance that declares the results that will be get from testing a hypothesis

Define viscosity - function of proteins, Explain Viscosity of proteins ...

Explain Viscosity of proteins Viscosity reflects resistance to flow. The  main  single factor influencing the viscosity  behavior  of protein  fluids  is   the  apparent  diame

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