Q18 / 90 · JEE Main 2012 (07 May Online) · Chemistry

All of the following statements apply to proteins except

  • A
    Proteins generally have no definite melting point
  • B
    Proteins contain the grouping - $\mathrm{CONH}-$
  • C
    Proteins have high molecular weight
  • Correct answer
    D
    Proteins can only contain the elements $\mathrm{C}$, H, O and N.

Solution

Statement (d) is not correct. Some proteins also contain $\mathrm{S}$, with $\mathrm{C}, \mathrm{H}, \mathrm{O}$ and $\mathrm{N}$.

Hence, the correct answer is option: 'D'.

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