Protein amino acid side chains can hydrogen bond in the major groove of DNA, and discriminate between each of the four possible base pairs.  In which one of the following groups of amino acids can all three members potentially be used in such DNA-protein recognition?

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#Question id: 19949

#XL - P Chemistry

The positron is as heavy as

TLS Online TPP Program

#Question id: 19950

#XL - P Chemistry

Atoms may be regarded as comprising of protons, electrons and neutrons. If the mass attributed to the neutrons were halved and that attributed to electrons were doubled then atomic mass of would

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#Question id: 19951

#XL - P Chemistry

How many electrons in an atom with atomic number 105 can have (n +l) = 8 ?

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#Question id: 19952

#XL - P Chemistry

The size of the nucleus is approximately

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#Question id: 19953

#XL - P Chemistry

The line spectrum ot two elements is not identical because .

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#Question id: 19965

#XL - P Chemistry

Bohr’s atomic model can explain the spectrum of