3A_Biomolecules

25th March 2010 Homeostasis-What can I remember? Definition-The property of a system to maintain an internal equilibrium to achieve a stable constant equilibrium

Example-Living things use matter and energy to build and maintain body structures: Young mammals feed on mother's milk, which contains calcium to build bones, and proteins to build muscles or body structure. Living things eat and grow or maintain in size.
 * KEYWORDS**
 * equilibrium
 * changing continuously
 * living cycle

taken from Ms Tan's wikispace:D
 * LEARNING SENTENCES**
 * 1) **Energy** is stored in the organization of matter
 * 2) Living organisms use matter and energy to build and maintain body structures
 * 3) Living organisms obtain and process matter and energy
 * 4) The structure of a molecule always dictates its function.
 * 5) The structure and function of biological living systems obeys the laws of thermodynamics.
 * 6) Communities of organisms depend on the cycling of matter and the flow of energy
 * 7) The constant flow of energy and cycling of matter in the biosphere leads to a balanced or steady state.


 * RANDOM LEARNING**
 * we form energy in the form of fats
 * mitochondria produces energy
 * energy can be lost by heat, but cannot be destroyed
 * energy can be transferred
 * humans waste much chemical energy

//Why is carbon such a suitable atom for life?//
 * carbon has a valency of 4, so it can bond with 4 other carbon atoms
 * double bond covalent
 * hence fat is hard to burn
 * covalent bonds are strong and hard to burn
 * it has the ability to form with itself
 * form macromolecules

//Why is the chemistry of water suitable for life?//
 * water, when frozen, expands instead of contracts, so the density is decreased, so ice floats on water:extreme example-iceberg floating