Ligases is a class of enzymes responsible for catalysing the linking together of two compounds. Which of the…
Ligases is a class of enzymes responsible for catalysing the linking together of two compounds.
Which of the following bonds is not catalysed by it?
$\mathrm{C}-\mathrm{C}$
$\mathrm{P}-\mathrm{O}$
$\mathrm{C}-\mathrm{O}$
$\mathrm{C}-\mathrm{N}$
Solution
Option (1) is the correct answer because, ligases are the enzymes that catalyse the linking together of 2 compounds, e.g., enzymes which catalyse joining of $\mathrm{C}-\mathrm{O}, \mathrm{C}-\mathrm{S}, \mathrm{C}-\mathrm{N}, \mathrm{P}-\mathrm{O}$ etc. bonds.
$\Rightarrow$ Options (2), (3) and (4) are wrong as ligase catalyse the joining of $\mathrm{P}-\mathrm{O}, \mathrm{C}-\mathrm{O} \& \mathrm{C}-\mathrm{N}$ bonds.