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bio 1100 e-1
Question | Answer |
---|---|
tissues are grouped together in functional units called | organs |
H2S is an example of | molecular formula |
tissues are | a group of cells that serve a common function |
the subatomic particles that play the greatest role in cellular chemical reactions are | electrons |
organelles are | compartments within cells |
a scientific explanation that is tentative and requires more investigation | hypothesis |
water is a polar molecule because | oxygen is more electronegative than hydrogen |
the mass within an atom comes from | protons and neutrons |
12 levels of organization | atoms, molecules, organelles, cells, tissues, organs, organ systems, organism, population, community, ecosystem, biosphere |
an atom becomes an ion when | it gains or loses electrons |
pasteur | proves theory of spontaneous regeneration is untrue |
hydrophobic | repelled by water |
hydrophillic | water "loving" |
the helium atom is inert because | its outermost shell is filled with electrons |
scientific method | observation, hypothesis, experiment, conclusion |
covalent bonds | form when one atom shares its electrons with another atom |
ionic bonds | form when one atom transfers its electrons with another atom |
atomic number | number of protons in the nucleus |
atomic weight | number of protons and neutrons in the nucleus |
H | hydrogen |
O | oxygen |
C | carbon |
N | nitrogen |
Ca | calcium |
P | phosphorous |
K | potassium |
S | sulfur |
Na | sodium |
Cl | chlorine |
Mg | magnesium |
I | idodine |
Fe | iron |
Zn | zinc |
Cu | copper |
Biological molecules | monosaccharide, amino acid, nucleotide |
Macromolecules | carbohydrates, lipids, proteins, nucleic acids |
pH | the measure of the degree to which a substance is acidic or basic |
functional groups | unique chemical groups that confer special properties to an organic molecule |
glycogen is a polysaccharide used for energy storage by | animals |
starch, glycogen, cellulose | polysaccharides |
DNA, RNA | nucleic acid |
peptide bond | connects amino acids to form a chain |
indigestiable glucose polysaccharide for humans | cellulose |
glycogen is used to store______in the____ | glucose;liver |
triglyceride | a lipid made of one glycerol and three fatty acids |
phospholipids | primary component in cell membranes |
cholesterol | lipid; keeps the fluidity of the rigidity of the cell |
unsaturated fatty acids | have one or more double bonds between the carbons |
every protein has a unique shape and function because | each protein has a unique sequence of amino acids |
proteins | hormone activity, enzyme activity, serving as transport molecules, serving as structural building materials |
nucleotides are the building blocks for | ATP, DNA, and RNA |
Organelles | organized structures that perform a specific function |
Prokaryotic cells | unicellular; no true nucleus; very small; bacteria and archaea |
Eukaryotic cells | often multicellular; membrane bound nucleus; much larger; plants, fungus, and animals |
Nucleus | contains DNA-information for protein produtction |
Ribosomes | site of protein synthesis |
Rough ER | "protein processing" |
Transport vesicles | transport protein to the golgi complex |
Golgi complex | protein modification, shipping, and sorting |
The protein pathway | 1. Nucleus 2. Ribosomes 3. Rough ER 4. Golgi Complex 5. Plasma membrane |
Transcription | DNA is copied onto messenger RNA (mRNA)then transfered to the ribosomes where protein synthesis continues |
Translation | nucleotides pair with the mRNA to create the protein |
octet rule | elements react to form compounds in such a way to put eight electrons in their outermost valence shell; 2,8,8 |
metals lose all their valance electrons forming | cations |
non-metals gain electrons to gain the noble gas configuration forming | anions |
polar bonds | unequal sharing of electrons |
non polar bonds | equal sharing of electrons |
solutes | chemicals added to water |
solution | chemicals and water |
solvent | substance that gets added to water |
diffusion | passive membrane process from a higher concentraion to a lower concentration |
osmosis | passive movement of water into a solution where the water concentraion is lower |