Atv1

1. que diferenças existem entre os organismos vivos e os objetos inanimados?
First is their degree of chemical complexity and organization. Thousands of different molecules make up a cell’s intricate internal structures. By contrast, inanimate matter—clay, sand, rocks, seawater—usually consists of mixtures of relatively simple chemical compounds. Second, living organisms extract, transform, and use energy from their environment, usually in the form of chemical nutrients or sun-light. This energy enables organisms to build and maintain their intricate structures and to do mechanical, chemical, osmotic, and other types of work. Inanimate matter does not use energy in a systematic, dynamic way to maintain structure or to do work; rather, it tends to decay toward a more disordered state, to come to equilibrium with its surroundings. The third attribute of living organisms is the capacity for precise self-replication and self-assembly, a property that is the quintessence of the living state. A single bacterial cell placed in a sterile nutrient medium can give rise to a billion identical "daughter" cells in 24 hours. Each of the cells contains thousands of different molecules, some extremely complex; yet each bacterium is a faithful copy of the original, its construction directed entirely from information contained within the genetic material of the original cell. 2. enumere alguns dos objetivos da Bioquímica como ramo da Biologia.
Biochemistry tries to define the means by which cells transform energy to accomplish work, catalyze chemical transformations, assemble complex molecules from simpler subunits, form supramolecular structures that are the machinery of life, and store and pass on the instructions for the assembly of all future generations of organisms from simple, nonliving precursors. 3. do que e como são constituídas as macromoléculas biológicas?
Deoxyribonucleic acids (DNA) are constructed from only four different kinds of simple monomeric