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Biochemistry Chemical reactions in living things.
Water Water is the most important inorganic compound in living things because….. Most cellular activities take place in water solutions
Water Polar molecule - has polar covalent bonds. O has a slight (-) charge H has a slight (+) charge (-) O H H (+) (+) Polar water molecules interact with each other by forming hydrogen bonds.
Properties of Water Cohesion: the tendency of molecules to stick together.
Properties of water (con’t) Adhesion: the attractive force between different substances. Example: trees transport water from roots to leaves.
Properties of water (con’t) Surface tension: a measure of how difficult it is to break the surface of a liquid. insects “walk” on the surface of water.
Properties of water (con’t) High heat capacity: has ability to resist temperature change. the ocean stores heat from the sun and gives it off during cooling, keeping the climate more mild.
Properties of water (con’t) Good solvent: dissolves many solutes in all cells, blood, and plant sap.
the concentration of hydrogen ions in solution Water molecules dissociate into ions (H+) and (OH-) pH
pH (con’t) Acid- chemical compound that donates H+ atoms to solution Base- compound that accepts H+ atoms and removes them from solution
pH (con’t) pH scale 0-14 range 7 neutral 0-7 acidic 7-14 basic
pH (con’t) In organisms, the pH must be maintained: blood 7.4, stomach acid 2.0 pH can affect the rate and nature of internal chemical reactions.
Section 2.2. What do you know about water? Unique Properties of Water: Most abundant compound in nearly all living things.
Chapter 3 Water and the Fitness of the Environment.
CH. 2 Chemistry of life Section 1 Nature of matter Atoms Atom- is the smallest unit of matter that cannot be broken down by chemical means. Atoms consist.
? Water =Life Water =Life Why water is so FREAKIN cool: 1. Its Polarity gives potential. 1. Its Polarity gives potential. 2. Cohesion/Adhesion/Surface.
1 The Nature of Molecules Chapter 3. 2 Atoms 3 Kinds of Atoms Ninety-two naturally occurring elements – Periodic table arranged by grouping atoms based.
1 Water. Life on earth evolved in water,and all life still depends on water. At least 80% of the mass of living organisms is water and almost all chemical.
Chemistry of Life. Small to large AtomsElementMoleculeMacromoleculeCellsTissuesOrgansOrganism.
Pre-AP Biology Water Properties (2.2) Part 1. Earth 2/3rds covered by water.
Water: The Facts Water is possibly the most important compound in living organisms. Water consists of 1 atom of oxygen combined with 2 atoms of hydrogen.
Why Study Chemistry in Biology?. I. Atoms Definition: smallest particle of an element.
1 The Nature of Molecules Chapter 3. 2 Water Chemistry Water consists of an oxygen atom bound to two hydrogen atoms by two single covalent bonds. – stable.
1. 2 Ice = less than 0°C (solid) Water = 0°C – 100 ° C (liquid) Steam = greater than 100 °C (gas)
Water and Solutions Section 3 Section 3 vocabulary ( 9 words) 1.polar molecules, 2.hydrogen bond, 3.mixture, 4.solvent, 5.solute, 6.acids, 7.bases, 8.pH,
I.N. 31 LIVING THINGS: Properties of Water AndAcids/BasesHeadingsVocabulary Important Words.
TOPIC 3: CHEMISTRY of LIFE. 3.1: Chemical Elements and Water.
Chemistry of Life. Element A substance that cannot be broken down into simpler substances. Each element is identified by a one or two letter symbol. Ca.
Chemistry of Life. I. Nature of Matter A. Atoms B. Chemical Bonding II. Water and Solutions A. Cohesion & Adhesion B. Polarity C. Acid & Bases.
Inorganic Compounds. Usually small Usually small Lack carbon and/or hydrogen Lack carbon and/or hydrogen Many contain ionic bonds Many contain ionic bonds.
1. 2 Hydrogen bonding 3 Surface tension 4 Ice, water, vapor.
Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 2 Chemistry of Life Revised by R. LeBlanc.
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings PowerPoint Lectures for Biology, Seventh Edition Neil Campbell and Jane Reece.
Chemicals of Life. Chemistry chemicals give cells properties of life –must know principles of chemistry to understand biology –organisms-bags of chemicals.
Structure & Properties of Water. STRUCTURE OF WATER POLAR MOLECULE CAPILLARY ACTION SURFACE TENSION UNIVERSAL SOLVENT COHESION ADHESION DENSITY BUOYANCY.
CH 2: CHEMISTRY. Matter What is it? Anything that takes up space, has mass, and made up of atoms. What are the 3 states?
AP Biology Chapter 3 Water and the Fitness of the Environment.
QOD: In a group of 4, each pick one paragraph of the article to read. (note: paragraph 2 is the hardest one, the back page will be more helpful) When.
Ch. 4 Chemical Basis of Life. 4.1 Life requires about 25 chemical elements.
Chemicals of Life. Chemical Basis of Life principles of chemistry help to understand biology organisms are bags of chemicals function of organisms & parts.
CHEMISTRY in Biology. Composition of Matter Matter - Everything in universe is composed of matter Matter is anything that occupies space or has mass Mass.
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