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Science Ch 1 Section 3 + 4
Science
18
Science
7th Grade
01/24/2006

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Term
Element
Definition
any substance that cannot be broken down into simpler substances
Term
Compound
Definition
when 2 or more elements come together
Term
Carbs
Definition
and energy rich organic compund made of the elemtents carbon, hydrogen, and oxygen
Term
Lipids
Definition
fats
Term
Proteins
Definition
large organic molecules
Term
Amino Acids
Definition
smaller molecules that make up protein molecules
Term
enzyme
Definition
a type of protein that speeds up chemical reactions in living things
Term
Nucleic Acids
Definition
organic molecules made uip of 5
Term
Nucleic Acids
Definition
organic molecules made uip of 5
Term
Nucleic Acids
Definition
organic molecules made uip of 5
Term
Nucleic Acids
Definition
organic molecules made uip of 5
Term
DNA
Definition
gm that carries information about an organism and is passed from parent to offspring
Term
RNA
Definition
plays an important role in production of proteins
Term
Selective Permeable
Definition
a property of cell membranes that allows some substances to pass through, while others cannot
Term
diffusion
Definition
the process by which molecules move from an area of higher consentrasion to an area of lower consentration
Term
osmosis
Definition
the diffusion of water molecules through a selectively permeable membrane
Term
Passive transport
Definition
the movement of dissolved materials through cell membrane without using cellular energy
Term
active transport
Definition
the movement of materials though a cell membrane using cellular energy
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