Bio Exam 1
Card Set Information
Bio Exam 1
Common features of all forms of life:
order (organized structure)
response to the environment
reproduction, growth & development
Basic building block of life:
maintain a stable, balanced, internal condition.
3 domains (groups) of life:
: like bacteria, prokaryotic, most are unicellular and microscopic.
: prokaryotic, most are unicellular and microscopic.
: eukaryotic, and contains a nucleus and organelles.
"built-in" variable the scientist controls.
anything that has a mass and takes up space.
pure substances that can't be broken down into other substances.
smallest unit of matter.
2 or more different elements mixed together in a fixed ratio.
= protons; always smallest number
= protons + neutrons; always bigger number
= mass # - atomic #
or biggest - smallest
atoms of the same element, but have a different amount of neutrons.
inner shell can hold a max of 2 electrons.
outer shells(s) can hold a max of 8 electrons.
Outer shell of an atom is called:
giving and taking of electron(s) to fulfill octet rule and results in IONS.
-sharing of electrons to fulfill octet rule (strong bond).
molecules where + charged hydrogen is attracted to - pole of another molecule.
group of covalently bonded atoms.
Non-polar covalent bond:
equal sharing of electrons, no change in charge.
Polar covalent bond:
unequal sharing of electrons, change in charge.
Hydrogen bonds form ________ molecules, covalent bonds form ________.
between; within water molecules.
mix of 2 or more substances.
substance being dissolved in a solution.
likes water; polar/ionic
Like dissolves Like:
if a solute is chemically similar (bond type) then the solute will dissolve well in the solvent.
hydrogen bonds hold water molecules tightly together.
hydrogen bonds between water molecules and other polar materials.
; absorbes H+
minimize changes in pH.
Organic substances have ______, which can form ___ covalent bonds.
attachment pieces that give the molecule a certain function or characteristic.
removes water to bond monomers together to form polymers.
add water to break apart polymers back into monomers.
What kinds of fat should be avoided?
Saturated and Trans. fat
Amino acid config:
-provide quick-burning energy
-bread, noodles, cereal
-no true monomer; triglyceride
-stored energy, insulation, water-proofing
-blubber, butter, waxes, steroids
-long-burning energy, support/structure, enzymes, motion
-pork, beef, tofu
-blueprint for body