The correct unit of measurement for the weight of biomacromolecules is the Dalton (Da).

Explanation:

Dalton:
- The Dalton (Da) is a unit of mass used to measure the weight of molecules and atoms.
- It is named after the British scientist John Dalton, who is known for his work on atomic theory.
- One Dalton is defined as 1/12th the mass of a carbon-12 atom.
- The Dalton is commonly used in the field of biochemistry and molecular biology to express the molecular weight of biomacromolecules.

Biomacromolecules:
- Biomacromolecules are large molecules that are essential for the structure and function of living organisms.
- Examples of biomacromolecules include proteins, nucleic acids (DNA and RNA), polysaccharides, and lipids.
- These molecules are made up of smaller subunits called monomers, which are connected by covalent bonds.
- The weight of a biomacromolecule is determined by the sum of the masses of its constituent atoms.

Why Dalton is the correct unit:
- The Dalton is the appropriate unit of measurement for the weight of biomacromolecules because it accurately reflects the mass of these large molecules.
- Other units, such as nanometer (nm), farad (F), and angstrom (Å), are not suitable for measuring weight.
- Nanometer is a unit of length, not weight.
- Farad is a unit of capacitance, which is unrelated to the weight of molecules.
- Angstrom is also a unit of length and is commonly used to measure atomic distances.
- Therefore, the correct unit for measuring the weight of biomacromolecules is the Dalton.