Explanation:

They are the world’s smallest machines. Their working is inspired by proteins that naturally act as biological machines within cells.
Molecular machines are discrete number of synthetic molecular components fused together.
They produce quasi-mechanical movements in response to specific external stimuli such as light or temperature change.
They are either natural or synthetic molecules that convert chemical energy into mechanical forces and motion.
Justification: Statement 2: Ribosomes are the protein builders or the protein synthesizers of the cell. They are like construction guys who connect one amino acid at a time and build long chains. Ribosomes are special because they are found in both prokaryotes and eukaryotes.
Another example of a biological motor is the protein kinesin, which uses the hydrolysis of adenosine triphosphate to move along microtubule filaments.
2016 Nobel Prize in Chemistry was based on the individual efforts in developing molecular machines. Learning: Molecular machines can be put to work as tiny motors, pistons ratchets or wheels to produce mechanical motion and can move objects many time their size.
Future Potential Applications include their functions as artificial muscles to power tiny robots or even prosthetic limbs in case of Bionics, new sensors, materials and energy storage systems, deliver drugs within the human body directly to target a specific area of tissue etc