KVPY SX SB Exam 05-Nov-2017 Question Paper

Choose the CORRECT combination of statements given below related to cysteine residue in proteins.
i. Cysteine can be linked to tyrosine by S-O bond.
ii. Cysteine can be linked to another cysteine by S-S bond.
iii. Cysteine can complex with Zn${}^{2+}$.
iv Cysteine can be linked to methionine by S-S bond