Macromolecules are large complex molecules present in colloidal state in intercellular fluid. They are formed by the condensation of low molecular weight micromolecules and hence are polymeric in nature.
Polysaccharides, proteins, and nucleic acids are common examples of macromolecules.
Define a taxon. Give some examples of taxa at different hierarchical levels.
What are the steps involved in formation of a root nodule?
Describe the role of liver, lungs and skin in excretion.
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