Proteins

The most abundant molecules in the cells. Most genetic information are expressed by proteins.

• Enzymes: catalysts that speed the rate of chemical reactions.
• Hormones: chemical messengers secreted by endocrine gland.
• Antibody: globular protein made by the body made in response to the presence of a foreign or harmful molecule called antigen.

• Nucleic Acid: complex polymeric molecules that store and transfer information within cells.

Two types:

RNA: plays a vital role in the process of protein manufacture

DNA: the genetic material determining the proteins to be manufactured

• Nucleotides: fundamental monomers that make up nucleic acid

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