BIOCHEM 2EE3 Lecture Notes - Lecture 1: Endoplasmic Reticulum, Iodine, Study Guide

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Bio(cid:272)he(cid:373)ist(cid:396)(cid:455)"s o(cid:396)igi(cid:374)s date (cid:271)a(cid:272)k to a(cid:374)(cid:272)ie(cid:374)t eg(cid:455)ptia(cid:374) ti(cid:373)es a(cid:374)d the (cid:373)aki(cid:374)g of (cid:449)i(cid:374)e. This environment was predominated by h and he. Life on earth is now primarily composed of c, h, n, o, p, and s. The human body is composed mainly of hydrogen atoms (>60%), followed by oxygen and carbon interplay between these 3 main elements that defines life. Earth is composed of certain elements, like silicon and aluminum, not found in the human body. Hydrogen component of water, biomolecules, main component of ph in body fluids = ~63% Oxygen building block of biomolecules and water =~25% Carbon building block of all organic molecules =~9% Nitrogen component of protein and nucleic acids (biomolecules) = ~3% Element basic substance that cannot be broken down into anything more basic. N, p and s are required as building blocks of many biological structures. The polymerization reaction is a condensation reaction, meaning the removal of a water molecule.

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