Final answer:
The significance of hydrogen bonds in the B-pleated sheet structure in proteins is stability and rigidity.
Step-by-step explanation:
The significance of hydrogen bonds in holding the B-pleated sheet structure in proteins is stability and rigidity. The hydrogen bonds between adjacent segments of the pleated sheet provide structural integrity to the protein. The aligned segments running parallel or antiparallel are connected by interchain hydrogen bonding, which allows for a stable and rigid protein structure.