# GATE2019: 26

In general, which one of the following statements is $NOT \;CORRECT$?

1. Hydrogen bonds result from electrostatic interactions
2. Hydrogen bonds contribute to the folding energy of proteins
3. Hydrogen bonds are weaker than van der Waals interactions
4. Hydrogen bonds are directional
in Others
edited

## Related questions

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2
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3
Protein concentration of a crude enzyme preparation was $10\:mg\:mL^{-1}$. $10\:\mu L$ of this sample gave an activity of $5\:\mu mol\:min^{-1}$ under standard assay conditions. The specific activity of this crude enzyme preparation is ____________ units $mg^{-1}$.
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