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March 23, 2016
EXAM 2
STRATEGY
1
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DECIDE WHETHER YOU CAN ANSWER IT
3
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START WITH QUESTION YOU KNOW BEST
Membrane Structure and Function
Besides providing the border of a cell, explain the three main functions of
the plasma membrane
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Using
enzymes scramblase and flippase they sort the lipids into the correct layer
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- symporter - way of cotransporting glucose and sodium to use the free
energy both to activate
Explain the relationship of ion transporters and the membrane potential
- ion transporter help to establish the membrane by shipping ions in or out
- low is -70 mV and high is +40mV
- many ions can contribute but the sodium/potassium most important
- the Nernst relationship is what establish the balance between voltage and
concentration
- describes the condition of equilibrium
Explain what an action potential is, and how it works

- AP is the depolarization of the membrane from -40 to 70 which is initiated by a
neuron to send a signal and can cause release NTs
- sodium and potassium - need the quickness of channels
- the signal sends a wave of charge that proceeds down the axon until it reaches
its stimulus
Cytoplasmic Membrane Systems
Explain the three ways proteins are imported into organelles
- nuclear pores - structure and function - i know this pretty well
- transport vessicles - one organelle to another
- translocators - into an organelle from cytosol to organelle
Explain the structure and function of a clathrin-coated vescicle, and the
roles clathrin and adaptin play
- i know this well - LDL - low density lipids ( cholestrol ) cycle
Explain the mechanism of vesicle tethering, docking, and fusion
- i know this well - NT is an example - neurotransmitters being released from
neuron
Explain how oligosaccharides are added to proteins in the rough ER
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5 - coffee
- cytosol is 7
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Explain the function of dyneins and kinesins
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- know pretty well
Know where in the cell glycolysis, citric acid cycle, and the electron
transport chain/chemiosmosis occur
- glycolysis - cytosol
- ETC- mitochondrial membrane
- Krebs - mitochondrial matrix
Know the main intermediate molecules in glycolysis and the citric acid cycle
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Explain the structure and function of the electron transport chain protein
complexes
- know this from the diagram on my cards
Define proton-motive force, and explain its role in the production of ATP
- know this from the diagram on my cards
Know table 14-1
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Explain the role of electron transport chains in photosynthesis

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