Covalent is stronger because the 2 atoms involve share 2 or more outer shell electrons. Covalent bonds hold all of your biomolecules together. Ionic bonds are formed when a valence outer shell electron is transferred from one atom to another - a much weaker interaction.

Similarly, which is the strongest bond in chemistry? ionic bond

Keeping this in view, how does a coordinate bond differ from a covalent bond?

Coordinate (Dative Covalent) Bonding. A coordinate bond (also called a dative covalent bond) is a covalent bond (a shared pair of electrons) in which both electrons come from the same atom. A covalent bond is formed by two atoms sharing a pair of electrons.

What type of bond is strongest?

A sigma bond is the strongest type of covalent bond, in which the atomic orbitals directly overlap between the nuclei of two atoms.