A reference solution is to be prepared with 5 PPM parabenzopyrene (molecular weight = 252). The quantity of parabenzopyrene required for preparing one litre 5 PPM solution is
The amino acid arginine (R) has how many ionizable protons?
The amino acid R has how many ionizable protons?
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What is a tissue-specific knockout mouse and an inducible knockout mouse?
The time required for the completion of 99.9% of a first order reaction is equal to how many times that of its half life? (A)2 (B)3 (C)5 (D)10
The line spectra of two elements are not identical because- (A)The element do not have the same number of neutrons (B)They have different mass numbers (C)Their outermost electrons are at different energy levels (D)They have different valencies