Bio-Chemistry (M.Phil./Ph.D.) 2019 Panjab University Entrance Exam With Answers

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4.

Side chains of tryptophan residues in proteins can interact with lectins. This is surprising because:

A: The side chain of tryptophan is hydrophilic and lectins are hydrophobic
B: The side chain of tryptophan is negatively charged and lectins are generally positively charged or are neutral
C: The side chain of tryptophan can make hydrogen bonds and lectins cannot
D: The side chain of tryptophan is hydrophobic and lectins are generally hydrophilic

The answer is: D

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