To solve the problem, we need to identify the ion produced by bases in water.
1. Understanding the Behavior of Bases:
Bases are substances that release hydroxide ions ($OH^-$) when dissolved in water. For example, sodium hydroxide (NaOH) dissociates in water to form $OH^-$ ions.
2. Identifying the Ion Released by Bases:
When a base dissolves in water, it gives $OH^-$ ions, which are responsible for its basic nature.
Final Answer:
Bases can give $ {OH^-} $ ions in water.
Match the amino acid given in List-I with their one-letter code given in List-II
\[ \begin{array}{|l|l|} \hline \textbf{Name of amino acid} & \textbf{One-letter code} \\ \hline (A) \; \text{Lysine} & (I) \; W \\ \hline (B) \; \text{Tryptophan} & (II) \; Q \\ \hline (C) \; \text{Tyrosine} & (III) \; K \\ \hline (D) \; \text{Glutamine} & (IV) \; Y \\ \hline \end{array} \]