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bio exam today lol

Terms in this set (27)

How do smooth and rough endoplasmic reticulum differ?
the rough ER is used to create proteins
peroxisomes
destroy and store peroxides
both plant and animal cells contain a cell wall
false
which is used for cell ID?
glycolipid
this feature of a plasma membrane can alter the fluidity and stabilize a plasma membrane
cholesterol
transmembrane proteins
1. aka integral proteins
2. spans the entire membrane
3. used to transport molecules
peripheral proteins
1. attached to inside/outside of membrane
2. helps give cell its shape
what factors make the plasma membrane more fluid?
shorter phospholipid tail length + the presence of double bonds
how does permeability affect membrane transport?
the more permeable a substance is, the easier it crosses the membrane
how does temperature affect the rate of diffusion?
hotter = faster
how does concentration gradient strength affect the rate of diffusion?
bigger = faster
how does solute size affect the rate of diffusion?
larger = slower
what is a difference between simple diffusion and facilitated diffusion?
facilitated diffusion requires a membrane protein
which solute is the most permeable through the plasma membrane?
1. large, non polar molecule
2. small, polar molecule
3. water
4. small, non polar molecule
small, non polar molecule
which can decrease membrane fluidity?
1. increase in temp
2. short-chain fatty acids
3. decrease in unsaturated fatty acids
decrease in unsaturated fatty acids
which does not affect membrane fluidity?
1. temp
2. fatty acid tail length
3. cholesterol
4. all affect membrane fluidity
all of em do, actually :3
in a hypertonic solution, where will water move?
1. water will move into the cell because the concentration of solutes inside the cell is higher than the concentration of solute outside the cell
2. water will move into the cell because the concentration of solutes inside the cell is lower than the concentration of solute outside the cell
3. water will move out of the cell because the concentration of solutes inside the cell is higher than the concentration of solute outside the cell
4. water will move into the cell because the concentration of solutes inside the cell is lower than the concentration of solute outside the cell
water will move into the cell because the concentration of solutes inside the cell is lower than the concentration of solute outside the cell
which is true about desmosomes?
1. provides communication between cells
2. resists tension between cells
3. prevents leaking between cells
resists tension between cells
which is true about gap junctions?
1. provides communication between cells
2. resists tension between cells
3. prevents leaking between cells
provides communication between cells
energy is released
exergonic
catabolic
exergonic
anabolic
endergonic
dehydration synthesis
endergonic
enzymes lower the activation energy needed for reactions
true
what example(s) are active transport?
1. diffusion
2. osmosis
3. bulk transport
4. sodium potassium pump
bulk transport and sodium potassium pump
enzymes start a reaction
false
what is a conformational change?
a change in shape
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