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30 Cards in this Set

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  • Back
element
Any substance that cannot be broken down into simpler substances
Atom
The smallest unit of an element
compound
Two or more elements combined chemically
Protiens
Large organinc molecules made of carbon hydrogen oxygen nitrogen and sometimes sulfur
Amino Acids
Smaller molecules that combine together to form protiens.
Carbohydrates
energy rich compound made up of carbon hydrogen and oxygen. sugar and starch are examples
lipids
oils fats and waxes
Nucleic Acid
contain the instructions that cells need to carry out all the functions of life
DNA
Deoxyribonucleic Acid - Genetic material that carries the information about an organism that is passed form parent to offspring
Where is DNA found
Found in the chromatin in the nucleus
RNA
Found in the cytoplasm and nucleus this plays a role in the production of protiens
Diffusion
The way molecules move into and out of a cell. Tend to move from and area of higher concentration to lower concentration
Selectively Permiable Memberane
Some substances can pass through while others cannot
osmosis
The movement of water in or out of a cell by diffusion
stomata
small openings in the underside of leaves that can open or close to control the movement of Carbon dioxide and water vapor
pigment
colored chemical compounds that absorb light
Chlorophyll
The main pigment found in chloroplast
respiration
Process by which cells break down glucose and release the energy they contain
fermentation
process of releasing energy that doesn't require oxygen
cell cycle
process of cells growing and dividing
interphase
1st phase of cell cycle when cell grows to mature size and makes a copy of its DNA
Mitosis - prophase
phase 2a of cell cycle chromatim in the nucleus condenses to form cohromosomes, nuclear membrane breaks down
Mitosis - metaphase
phase 2b of cell cycle chromosomes line up across the center of cell each attackes ot a spindle fiber at cntromere
mitosis - anaphase
phase 2c centromeres split -two chromatids separate cell becomes stretched out
mitosis - telophase
phase 2d - chromosomes lose rod like appearance. new nuclear membrane forms
cytokinesis
phase 3 cell membrane pinches and cell eventually divieds forming a daughter cell with same # of identical chromosomes and about half of cytoplasm
Replication
when a cell makes copy of its own DNA before mitosis occurs
chromosome
doubled rod of condensed chromatin part of DNA
chromatid
one of the identical rods or srtrand in chromosome
4 main groups of organic molecule
Protiens,carbohydrate,lipid,nnucleic acid