Tetrahedron generally known as triangular pyramid consists of 4 triangular faces, 6 edges and 4 vertices. The base of the tetrahedron is a triangle. All the vertices have the same atom that is bonded to the central metal atom which lies in the centre of the tetrahedron. We take as an example to see how the atoms actually bond in tetrahedron. It is quite visible from the image that 4 O-atoms lies on all the 4 vertices and 1 Si-atom lie in the centre.
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Your cuticle is the outer coating of hair composed of overlapping scales.
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Answer:
Moles:
Molar mass:
Explanation:
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In this case, we can use the ideal gas equation to compute the moles of the gas sample as shown below:
Thus, we should use the pressure in atm as follows:
Moreover, the molar mass is obtained by dividing the given mass by the obtained moles:
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Answer:
D. increasing protonation of β-chains His 146 with decreasing pH (i.e., higher H concentration) which stabilizes the T state conformation of Hemoglobin.
Explanation:
Human Hemoglobin is a tetrameric protein: consists of two α- and two β-subunits, and is organized as a dimer of two identical αβ dimers to form an (αβ)2 tetramer. Each subunit contains one heme group to which one O2 molecule binds reversibly. Hemoglobin principally has T low oxygen affinity state and R high oxygen affinity state, deoxyHb and fully liganded Hb respectively.
The binding of ligands such as H+, Cl- or BPG lowers the O2 affinity, in such way that affinity of hemoglobin towards oxygen O2 is decreased, when acidity of the environmental solution increases. So, when pH decrease acidity increases, there are more H+ available who bind to His 146 in β1 and β2 respectively. After that, O2 is released.