Which of the following statements are true?
P : Those which have molecular weights 596 Dalton are called micromolecules.
Q: Those which have molecular weights 1288 Dalton are called macromolecules.
R: Lipids have molecular weight more than ten thousand Dalton and above.
S: Biomolecules are of three types (i) micromolecules (ii) simply biomolecules and (iii) macromolecules.

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