Alexander Varshavsky discovered, the half-lives of many cytoplasmic proteins vary with the identities of their N-terminal residues via the so-called N-end rule:-

A. Destabilizing N-terminal residues Asp, Arg, Leu, Lys, and Phe have half-lives of	i. Only 2 to 3 minutes,
B. Stabilizing N-terminal residues Ala, Gly, Met, Ser, Thr, and Val have half-lives of	ii. >10 hours in prokaryotes iii. >20 hours in eukaryotes.

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#Question id: 5741

#Part-A Aptitude & General Biotechnology

In a mammal 2 Barr bodies are observed.  How many X chromosomes does the organism have?

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#Question id: 3025

#Part-B Specialized Branches in Biotechnology

Penicillin is an antibiotic that inhibits enzymes from catalyzing the synthesis of peptidoglycan, so which prokaryotes should be most vulnerable to inhibition by penicillin?

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#Question id: 19013

#Part-A Aptitude & General Biotechnology

Ion exchange chromatography is based on the_____________

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#Question id: 41

#Part-A Aptitude & General Biotechnology

Enzymes are biological catalysts that enhance the rate of reaction by:

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#Question id: 803

#Part-B Specialized Branches in Biotechnology

A single-stranded DNA molecule contains 40 nucleotides and has the sequence 5’-(GA)20-3’. When this single strand binds to a complementary DNA strand to form a B-DNA structure,