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!
Myoglobin
We can build up the structure of haemoglobin by considering a single unit or monomeric form caned myoglobin. This consists of a single polypeptide chain the globin in which the haem group is embedded. Myoglobin is found in striated muscles of vertebrates and combines with one molecule of oxygen. The vertebrate haemoglobins are tetramers formed by the aggregation of four polypeptide chains each containing a discrete haem group. Thus each haemoglobin can combine with four molecules of oxygen forming oxyhaeomoglobin in a reversible reaction and the unoxygenated compound is called deoxyhaemoglobin.
Two monomers in human haemoglobin are of a type called s and the other two are P type. Nearly all vertebrate haemoglobins are tetramers but invertebrate haemoglobins are more diverse. The most distinctive feature is that the subunits often form large aggregates of relative high molecular weights. In mammalian blood the amount of physically dissolved oxygen is about 0.2 ml of oxygen per 100 ml of blood. The amount found bound to haemoglobin is 20 ml oxygen per 100 ml of blood. The dissolved oxygen is therefore, almost insignificant in animals without respiratory pigments. The only exception is the antarctic fish which lacks a respiratory pigment altogether. The explanation could be that at low temperature, the metabolic rate is low and oxygen like other gases has higher solubility at low temperature.
State in brief about the Macronutrients Each element is specific in its function in plant metabolism, however, the exact functions for a number of them are still not known. T
Describe the structure of pectin Its structure is presented in the figures (a) and (b). Pectin is a polygalacturonic acid ester along with rhamnose, arabinose and galactose.
Define water losses by Intestine and Lungs? Intestine : A small quantity of water (about 100-200 ml) is normally lost in faeces, but this can exceed 5 L in diarrhoeal episodes
Nitrogen Cycle The nitrogen is an essential constituent of protein - the building block of all living cells. It is also a major constituent of the atmosphere (79 per cent). Al
Spermiogenesis - Spermatogenesis At the end of the meiosis the spermatids appear as simple spherical cells with a centrally located nucleus. Their differentiation into sperm r
Explain the Conveyor (or Band) Dryers? In the conveyor (or band) dryer, the product is distributed on a moving belt, typically of a perforated plate, that passes through a tunn
Q. Explain about Climate Regulation? By giving off moisture through their leaves and providing shade, plants help keep us and other animals cool. Forests are especially good cl
Q. Where in eukaryotic cells does mRNA synthesis take place? To where do these molecules migrate? Messenger RNA molecules are synthesized within the nucleus, pass through gain
Explain the term Ferns? Ferns are plants that have vessels that conduct water, minerals, and nutrients, and reproduce through spores, rather than seeds. Ferns are therefore o
difference between the respiration occurs in lower and higher organisms
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