Chapter 1 & 2 Flashcards
Exergonic
Energy is released
Endergonic
Energy must be supplied (input/absorbed)
Catalysts
Reduce needed activation energy
Enzymes
Biological catalysts
What makes up enzymes
proteins
Induced Fit Model
Enzymes bind around substrate changing shape
Enzyme synthesis
active site orients substrate in correct position for reaction brings them closer togehter
Enzyme digestion
puts stress on bonds that must be broken
saturation point
all enzyme active sites are engaged
Primary Structure
Unique sequence of amino acids in a polypeptide- not functional
Secondary Structure
folding or coiling of the polypeptide- not functional
Tertiary Structure
Overall 3-dimensional shape of polypeptide results from interactions between amino acids and r groups
Quaternary Structure
two or more polypeptide subunits
Cohesion
like molecules bonding
High Specific Heat
amount of heat needs to be absorbed for 1 gram of that substance to change by 1’C
Evaporative cooling
sweating- evaporation absorbs heat
Hydrophobic
nonpolar (lipids)
hydrophilic
polar or ionic (carbs)
Denaturation
Loses 3d shape
Changes in salinity
adds and removes cations and anions
Competitive Inhibitor
Competes for active site- blocks substrate
Non competitive inhibitor
bonds to allosteric site and changes enzyme shape
Feedback Inhibition
the final product is an inhibitor of earlier step
Procaryotic Cells
Simpler and smaller cells
Procaryotic does not have
cell membrane and nucleus
types of procaryotic cells
bacteria, archaebacteria
Procaryotic Organelles
nucleoid, ribosomes, cell wall, capsule, membrane, flagella, cytoplasm
Nucleus
contains nucleolus and DNA
enclosed in double membrane
nuclear pores allow substances in and out
Nucleolus
produces ribosomes
Ribosomes
carry out protein synthesis
ribosomes building blocks
RNA and proteins
where the ribosomes are
cytosol and rough er
Smooth ER
synthesizes and transports lipids detoxifies drugs and poison
ROUGH ER
folds and transports proteins
golgi
basically protein amazon (receives, ships, sorts)
Lysosomes
Digesterrrrs (contains enzymes some animals use for digestion)
Vacuoles
Storage
sometimes food vacuoles
Contractile vacuoles: pump out excess water
Mitochondria
generate ATP
chloroplast
plannntttsss photosynthesis
Peroxiding
enzymes convert hydrogen to water
Cytoskeleton
therapistttt
shapes and supports
guides movements of organelles
celebrates chromosomes in cell division
Components of Cytoskeletons
3 fibers:
microtubules (thiccccest)
microfilaments (skinny queens)
intermediate filaments
Centrosomes and Centrioles
aids animal cell division
Cilia
short hairs
Flagella
long whip like hairs
Cell Wall
only in plants maintains shape
ECM
in animal cells
glycoproteins make it up
bind to receptor proteins in plasma membrane
Amphipathic
Has both hydrophilic and phobic parts (phospholipids are these)
Fluid Mosaic Model
makes up the membrane and allows for movement
What passes through membrane
small nonpolar
membrane carbohydrates
identifies cells and what can enter
turgid
full
plasmolysis
plant cells wilting
Aquaporins
allow water to flow rapidly in and out of cells (is a protein)