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Bio Vocab

covalent bond electrons being shared between two atoms to form a molecule
hydrogen bond when a hydrogen atom is part of a polar covalent bond it's partial positive charge allows it to share attractions with other electronegative atoms, such as oxygen or nitrogen. pg. 24
cohesion/ cohesive the sticking together of particles of the same substance. ex: when water sticks to water
adhesion/ adhesive the action or process of sticking to a surface or object. ex: when tape sticks to paper
polar uneven sharing of electrons that causes partial charges
hydrophilic having a tendency to mix with, dissolve in, or be wetted by water
hydrophobic tending to repel or fail to mix with water.
non polar even sharing of electrons to produce neutral (no charge) molecules
the six key elements that make up the majority of living tissues (CHNOPS) carbon, hydrogen, nitrogen, oxygen, phosphorous, sulfur
the four major macromolecules found in cells proteins, nucleic acids, lipids, carbohydrates
proteins "the work horse of the body" jobs: transportation, movement, structure, immunity
nucleic acids contain the genetic code (DNA) are passed down to offspring via reproduction
lipids long term energy storage used to keep bodies warm and are major parts of the cell membrane
carbohydrates short term/ immediate energy source made by plants and other organisms through photosynthesis
biology the study of life
science the study of the natural world
skills of a scientist 1. observation 2. gather and organize data 3. communicate what you've learned
characteristics of life (there are 6) 1. made of one or more cells 2. reproduce 3. requires energy 4. change, adapt, evolve w/ genetic code (DNA) 5. grow and develop 6. responds to stimuli
atom the smallest bit of matter that retains the properties of an element
molecule a group of two or more atoms held together by covalent bonds
bond an attraction between two atoms resulting from the sharing of outer-shell electrons or the presence of opposite charges on the atoms.
macromolecule a molecule containing a very large number of atoms, such as a protein, nucleic acid, or synthetic polymer
electron a subatomic particle with a single negative electrical charge
proton a subatomic particle with a single positive charge
neutron a particle that is electrically neutral ( has no electrical charge)
property quality of an element
polarity charged
subatomic particle a particle smaller than an atom
solution= solvent + solute
monomer a molecule that can be bonded to other identical molecules to form a polymer
polymer a substance that has a molecular structure consisting mostly or entirely of a large number of similar units bonded together
dehydration reaction a chemical reaction that involves the loss of a water molecule from the reacting molecule
atomic nucleus the region where the protons and neutrons are
if an atom is hydrophobic, why won't it mix with water? The electrons in the atom are shared evenly making them neutral and unable to mix with water
atomic number is the number of protons
number of neutrons= mass-atomic number
Created by: cosettegiroux