CSIR-NET Dec-2015 q3

The oxidizing power of [CrO4]^2- , [MnO4]^2- , and [FeO4]^2- follows the order
(1.) [CrO4]^2- < [MnO4]^2- < [FeO4]^2-
(2.) [FeO4]^2- < [MnO4]^2- < [CrO4]^2-
(3.) [MnO4]^2- < [FeO4]^2- < [CrO4]^2-
(4.) [CrO4]^2- < [FeO4]^2- < [MnO4]^2-

Soln (1) 

The more an element is electronegative, the higher will be is oxidizing power. More electronegative is Fe (26), followed by Mn (25) and then Cr (24), so the order for the oxidizing power of those elements : Fe>Mn>Cr. 
Since oxidation number is same (VI) in all three metals.
[CrO4]^2- < [MnO4]^2- < [FeO4]^2-
Reference https://www.physicsforums.com/threads/a-problem-about-oxdizing-power.827918/

CSIR-NET Dec-2015 q2

Deoxy – Hemocyanin is
(1.) heme protein and paramagnetic
(2.) Colorless and diamagnetic
(3.) O2 transport and paramagnetic
(4.) Blue colored and diamagnetic

Soln (2)
colorless Cu(I) deoxygenated form = d¹⁰ configuration (diamagnetic)

the blue Cu(II) oxygenated form.

Reference-
Hemocyanins (also spelled haemocyanins and abbreviated Hc) are proteins that transport oxygen throughout the bodies of some invertebrate animals. These metalloproteins contain two copper atoms that reversibly bind a single oxygen molecule (O2). They are second only to hemoglobin in frequency of use as an oxygen transport molecule. Unlike the hemoglobin in red blood cells found in vertebrates, hemocyanins are not bound to blood cells but are instead suspended directly in the hemolymph. Oxygenation causes a color change between the colorless Cu(I) deoxygenated form and the blue Cu(II) oxygenated form.
Coates CJ, Nairn J (July 2014). "Diverse immune functions of hemocyanins". Dev. Comp. Immunol. 45 (1): 43–55.doi:10.1016/j.dci.2014.01.021. PMID 24486681.

CSIR-NET Dec-2015 q1

The biological functions of the cytochrome P₄₅₀ and myoglobin are, respectively 
(1.) Oxidation of alkene and O₂ storage 
(2.) O₂ transport and O₂ storage 
(3.) O2 storage and electron carrier 
(4.) Electron carrier and O₂ transport 

Soln 
(1) Oxidation of alkene (aliphatic)
The most common reaction catalyzed by cytochromes P₄₅₀ is a monooxygenase reaction, e.g., insertion of one atom of oxygen into the aliphatic position of an organic substrate (RH) while the other oxygen atom is reduced to water:

RH + O₂ + NADPH + H+ → ROH + H2O + NADP+

(Retrieved from https://en.wikipedia.org/wiki/Cytochrome_P450)

(2) O_{2 storage}
Myoglobin (symbol Mb or MB) is an iron- and oxygen-binding protein found in the muscle tissue of vertebrates in general and in almost all mammals. It is related to hemoglobin, which is the iron- and oxygen-binding protein in blood, specifically in the red blood cells.
Nelson DL, Cox MM (2000). Lehninger Principles of Biochemistry (3rd ed.). New York: Worth Publishers. p. 206.ISBN 0-7167-6203-X. (Google books link is the 2008 edition)

CSIR NET – 2012 Q: 143

CSIR NET – 12

Q: 143 – The osazone A could be obtained from –

                 A)    Glucose and mannose                      B)           Mannose and galactose

                 C)     Gulose and fructose                        D)     Galactose and fructose

Answer : A) Glucose and mannose