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1107 abbott
exam
163
Biology
Undergraduate 1
02/10/2011

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Cards

Term
induced fit
Definition
enzymes are flexible and change shape when reactants bind to active site
Term
adhesion
Definition

ability of a molecule to bond to another unlike surface

 

(usually how liquids interact with solids)

Term
endergonic
Definition

non spontaneous reaction

change of G >0

Term
Definition
[image][image][image]
Term
exergonic
Definition

spontaneous reaction

change of G <0

Term
cellulose
Definition
found in plant cell walls, fiberous, structural polymer of Beta-glucose
Term
sulfhydryl group
Definition

Often found in proteins where it becomes S2 (disulfide bonds)

 

contributes to the structure of the protein

 

THIOLS

Term
Electronegativivty
Definition

Atoms that only need a couple more electrons to complete their valence shell have higher electronegativity

 

Essentially, its a measurement of how badly the atom wants the electron

Term
chemical reaction
Definition

the adding or subtracting of a substance which results in the atoms rearranging into new larger or smaller molecules/atoms

Term
hydrogen bonding
Definition
weak electrical attractions between H+ to an electronegative atom (O, N, F)
Term
hydrolysis
Definition
the breaking down of polymers through the adding of water molecules
Term
Activation energy
Definition
amount of freen energy needed to reach the transition state of a reaction
Term
amino group
Definition
[image]
Term
carboxyl group
Definition

carboxylic acids

acts as an acid

donates an H+

hydrogen bonding

Term
Carbonyl group
Definition

Keytone & Aldehyde

reacts with certain compounds to form larger molecules

Term
aldehyde group
Definition
[image]
Term
hydroxyl group
Definition

Alcohols

sometimes acts as an acid

good solvent because of H+ bonding

highly polar

 

Term
hydroxyl
Definition
R-OH
Term
Amylase
Definition
enzyme that catalyses the hydrolysis of an alpha glycosidic link in starches (plants)
Term
ribonucleotides
Definition

sugar - ribose

OH bonded to the 2 of the carbon

Term
phosphate group
Definition

2 negative charges

when O-P bonds are broken they release lots of energy

ORGANIC PHOSPHATE

Term
gibbs free energy change
Definition

[G] = [H]-T[S]

[]=change of

h = potential

T=temperature (kelvin0

S= entropy

determines if a reaction is spontaneous or not

Term
thermal energy
Definition
kinetic energy of molecular motion
Term
temperature
Definition
measure of how much thermal energy molecules posess
Term
Heat
Definition
transferral of thermal energy
Term
ribosomes
Definition

no membrane=not an organelle

in RNA and proteins

involved in protein synthesis

Term
nucleus
Definition

"control center"

structural support

in nuclear envelope

double membrane

genetic info

assembly of ribosome subunits

contains: nucleolus, chromosomes, nuclear lamina

Term
phospholipid
Definition
glycogen, 2 fatty acid OR isoprene, and a phosphate group
Term
chitin
Definition

found in fungi, some algae, and exoskeletons in some animals - NAc monomers

structural polymer

Term
Ribonucleic Acid (RNA)
Definition

5-3 connections

Uracil, cytosine, guanine, adenine

single stranded

ribonucleotides polymerized

Term
ATP
Definition

adenosine triphosphate

EXERGONIC (SPONTANEOUS)

free energy = cell work

 

Term
glycoproteins
Definition

proteins joined to carbs by covalent bonds

span entire plasma membrane

display info oligosaccharide (tag)

Term
plasma membrane
Definition

membrane surrounding the cell

separates life from non-life

selectively permeable

protection

bilayer of phospholipids

allow/disallow certain things into cell

facilitate necessary chemical reactions

Term
Bases
Definition

gain a H+

lowers H+ ion concentration of solution

7-14

gives off OH-

 

Term
Acids
Definition

donates H+

Highers the H+ concentration of solution

0-7

Term
pH
Definition

pH= -log [H+]

[] = concentration

measure of acidity/alkalinity

Term
ketone
Definition
[image]
Term
energy
Definition
the capacity to do work/supply heat
Term
amino group
Definition

AMINES

acts as an acid

gives up H+

hydrogen bonding

Term
Deoxyribonucleic Acid (DNA)
Definition

double stranded

helix

5-3, 3-5 bonding

polymerization of deoxynucleotides

Term
pyrimidines
Definition
cytosine, uracil, thymine
Term
electron shell
Definition

can hold a specific number of orbitals

orbitals are grouped

2 electrons/orbital

Term
subtrate
Definition
reactant molecules
Term
protein
Definition
made up of strings of amino acids
Term
spontaneous chemical reaction
Definition

exergonic

[G] < 0

proceeds on its own without constant external influence

products usually have a lower amount of free energy than the reactans

Term
2nd law of thermodynamics
Definition
entropy increases in an isolated system
Term
functional groups
Definition
groups of atoms containing H, N, O
Term
Mole
Definition

6.022 x 10 -23

mass of 1 mole of any molecule is the same as its molecular weight in grams

Term
active site
Definition
location where substrates bind and react
Term
catalyst
Definition
substance that lowers the activation energy needed for a reaction and the time it takes
Term
allosteric regulation
Definition

regulatory molecules bind to enzyme somewhere ELSE than the active site

essentially it changes the shape of the enzyme

Term
competitive inhibition
Definition
molecule similar in size and shape to the catalyst competes to bind to the active site of the enzyme
Term
hydrophilic
Definition

water loving

ions and polar molecules that interact with water

Term
hydrophobic
Definition
uncharged, nonpolar molecules (usually found in lipids) that do not stay in an aqueous solution and do not interact with water
Term
cohesion
Definition

molecules ability to bind to like molecules

CAUSES HIGH SURFACE TENSION

Term
Ion
Definition
charged atom/molecule
Term
phosphate group
Definition
[image]
Term
chemical equilibrium
Definition
when forward and reverse reactions proceed at same rate and produce same quantities
Term
oligopeptides
Definition
contain less than 50 amino acids
Term
keytose
Definition
found in middle of a monosaccharide
Term
carbonyl monosaccharide
Definition
aldose and keytose
Term
carbohydrates
Definition

raw material for synthesizing other molecules

structural support

cell i.d. (tags)

storing chemical energy

Term
monosaccharide
Definition
monomer of sugar
Term
aldose
Definition
found at the end of a monosaccharide
Term
triose
Definition
3 carbon sugar
Term
hexose
Definition
6 carbon sugar
Term
pentose
Definition
5 carbon sugar
Term
polysaccharide (complex carbs)
Definition
polymerized monomers of monosaccharides linked by glycosidic linkages
Term
disaccharide
Definition
smallest form of a polysachharide (2 monosaccharides)
Term
starch
Definition
plants' storage of glucose
Term
peptidoglycon
Definition
monosaccharide backbone of bacteria, makes up the cell wall
Term
glycogen
Definition
the way animals store glucose
Term
heat of vaporization
Definition
amount of energy needed to change 1 gram of liquid into gas
Term
sulfhydryl
Definition
[image]
Term
specific heat
Definition
amount of energy required to raise 1 gram of a liquid 1 degree celsius
Term
water's properties
Definition

adhesive

cohesive

high surface tension

denser as a liquid than as a solid

Term
polar covalent bond
Definition

one atom holds the electrons tighter than the other(s)

aka assymetrical sharing of the electrons

makes a partial charge in the molecule

Term
ionic bond
Definition
the complete transferral of electron(s) from 1 molecule to another in order to fill the shell
Term
molarity
Definition
moles/liter
Term
anion
Definition

negatively charged ion

gains an electron

Term
cation
Definition

positively charged ion

donates an electron

Term
molecular weight
Definition
sum of mass numbers of all atoms in a molecule
Term
solvent
Definition
the thing doing the dissolving
Term
solute
Definition
thing being dissolved
Term
covalent bond
Definition
chemical bond where the molecules share electrons in the outershell to create pairs
Term
non-polar covalent bond
Definition

bond in which molecules share electrons and neither are holding the electrons tighter

(seen between 2(+) of the same molecule, ex: H-H)

Term
monomer
Definition
molecular subunit
Term
organic molecule
Definition
molecules containing carbon
Term
entropy
Definition
amount of disorder in a system
Term
polymerization
Definition
the linking of monomers
Term
transition state
Definition
the in between state of a reaction (caused by collision) combo of old and new bonds
Term
pions
Definition
proteins that fold incorrectly and then influence those arround them to do the same
Term
multienzyme complex
Definition
several enzymes that catalyze one reaction
Term
denature
Definition
change the shape by trading compounds
Term
molecular chaperones
Definition
molecules that aid in the proper folding of proteins
Term
mass number
Definition
summation of atomic number (number of protons) and number of neutrons
Term
atomic number
Definition
number of protons
Term
valence
Definition
number of unpaired electrons in outer shell
Term
valence electrons
Definition
outermost shell of an atom
Term
orbital
Definition
region where electrons move around
Term
isotopes
Definition
elements with same number of protons but different number of neutrons
Term
daltons
Definition
unit of measurement for the atomic weight
Term
phosphodiester linkage
Definition
condensation reaction of the H of the phosphate group (the 5 of the sugar) and the OH of the sugar (the 3) results in water
Term
purines
Definition

adenine, guanine

bigger than pyrimidines

Term
deoxyribonucleotide
Definition

sugar=deoxyribose

H bonded to the 2 of the sugar

Term
buffer
Definition
solution that prevents dramatic changed in the pH level
Term
homeostasis
Definition
maintaining relatively constant conditions
Term
endothermic
Definition
absorbs heat for a chemical reaction
Term
exothermic
Definition
gives off heat during a reaction
Term
potential energy
Definition
stored energy
Term
kinetic energy
Definition
energy in motion
Term
1st law of thermodynamics
Definition
energy cannot be created only transferred
Term
oligosaccharide
Definition
the i.d. tag attached to the glycoproteins
Term
hydrocarbon
Definition
nonpolar molecule containing only H and C
Term
endomembrane system
Definition

smooth ER

rough ER

golgi apparatus

lysosomes

Term
fats
Definition
composed of 3 fatty acids linked to glyogen
Term
cholesterol
Definition
steroid found in mammals
Term
steroid
Definition

type of lipid

distinctive 4 ring structure

Term
how do you change a fat into a phospholipid?
Definition
remove a fatty acid, add a phosphate group
Term
building blocks of lipids
Definition
fatty acids and isoprenes
Term
nucleoside triphosphate
Definition
transfer of 2 phosphates in nucleic acid polymerization
Term
phosphorylase
Definition

enzyme that catalyses the hydrolysis of alpha glycosidic links in glycogen

ANIMALS

Term
fatty acids
Definition
composed of hydrocarbon chains bonded to a carboxyl group (-COOH)
Term
glycerol
Definition

3 carbon molecules

aka triglycerides/triaglycerols

Term
lipids
Definition

carbon containing compound found in nonpolar hydrophobic organism

hydrocarbon components composed of fatty acids

dont dissolve in water

Term
sugar
Definition

organic group with cabonyl group (C=O)

several hydroxyl (-OH) groups

Term
phosphorylation
Definition

transfer of 1+ phosphate groups to a substrate molecule

raises potential energy of substrate and enables endergonic reactions

Term
peptide bond
Definition

C-N bonds formed from condensation reactions

aka Polymerization

Term
dehydration reaction
Definition

process through which monomers polymerize

results in a lack of water molecules

Term
polypeptide
Definition

amino acids linked by peptide bonds into a chain

amino acids become residue

Term
chemical energy
Definition

potential energy stored in chemical bonds

break the bonds to get the energy

Term
amino acids
Definition

4 electrons in valence shell

1 NH2 amino functional groups

1 COOH carboxyl group

1 H+ hydrogen

1 R group - side chain

Term
prokaryote
Definition

bacteria

archaea

Term
eukaryotic
Definition
eukaryote
Term
chromosomes
Definition

in nucleoid

DNA

superoils to fit cell

Term
gene
Definition

build RNA DNA

polypeptide

within DNA, within the chromosome

Term
nucleoid
Definition

center of the cell

about 20% of cell's volume

prokaryote

Term
plasmids
Definition

 

genes independent og chromosomes

helps adapt to unusual circumstances

Term
organelle
Definition
membrane bound compartment containing enzymes or specialized structures for certain functions
Term
cytoskeleton
Definition
long, thin fibers that create structure for the cell
Term
cytoplasm
Definition
inside of the cell, in between the organelles and other structures
Term
flagella
Definition
rotation that allows aquatic cells to swim
Term
cell wall
Definition

tough, fibrous wall surrounding plasma membrane

protection

shape

Term

glycolipids

 

Definition

protective layer outside the cell wall

lipid containing carbs group

Term
differences betwen prokaryotic and eukarotic cells
Definition
eukaryotic - chromosome found in membrane bound nucleus, larger cells, contain more internal membrane, diverse and dynamic cytoskeleton
Term
nucleus (Eukaryotic)
Definition

contain chromosomes

produces gene products

decode DNA

produce RNA messages

Term
nuclear envelope
Definition

double membrane

pore studded

Term
nuclear pores
Definition

connect inside to cytosol

selective passage

only way into the nucleus

consists of 50 different proteins

Term
ER
Definition

membrane bound sacs found in nuclear envelope

extends into cytoplasm

Term
rough ER
Definition
rough because of ribosomes attached to it
Term
smooth ER
Definition

no ribosomes attached

containes enzymes for lipid reactions

manufactures phospholipids

 

Term
lumen
Definition
interior of any sac-like structure
Term
nucleus lamina
Definition

inside surface of the nucleus envelope

fibrous proteins that form a lattice ike structure

maintians shape

chromosomes attach themselves to the lamina

Term
nucleolus
Definition

manufactures RNA molecules

manufactures large and small ribosomal units

Term
golgi apparatus
Definition

processes products of the rough ER

flattened membraneous sac

contains cisternae

bubbles on the side are membrane bound vesicles that carry proteins to and from organelles

Term
cisternae
Definition

distinct polarity

cis part is close to rough ER and recieves the products

trans part is close to plasma membrane and ships ER products to the surface

 

Term
cytosol
Definition
ribosomes float in this
Term

peroxisomes

 

Definition

globular organelles

single membrane

originate from buds on ER

center for oxidation reactions

Term

glyoxysomes (plants)

 

Definition
enzymes that oxidize fats to form a compound that enables the cell to store energy
Term

lysosomes

 

 

Definition

organelles that digest

interior very acidic

specialize in breaking up macromolecules

Term

endocytosis

 

Definition
the pinching off of the plasma membrane resulting in uptake from outside the cell
Term
mitochondria
Definition

produces ATP

double membrane

has cristae(ATP synthesis)

manufactures ribosomes

 

 

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