Biomembranes an der LMU München | Karteikarten & Zusammenfassungen

Lernmaterialien für Biomembranes an der LMU München

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Fastest diffusion type of lipids within the membrane is the...

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uncatalyzed lateral diffusion

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Which statements are correct?

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BIP is an HSP70 and functions as a molecular ratchet.

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Which of the following are biological functions of lipids ?

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lipid bilayer, membrane structure

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Flippases are enzymes that catalyse the transversal diffusion of lipids by providing a polar / hydrophilic environment / region for the head group while passing through the hydrophobic core region of the membrane.

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TRUE

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Which of the following are characteristics for (Ion)channels?

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regulation by opening and closing of the channel

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When you draw a cell you mostly draw ...

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Biomembranes

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Which of the following are cellular functions of biomembranes?

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Boundary definition: in vs. out (-->establish cell since they surround it) as well as provide cell-cell-contacts (communication pannels)

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There are different Integral membrane proteins  like bi-topic or poly-topic α–helical membrane proteins, amphipatic helix or ß-barrel proteins.

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TRUE


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Structure of fatty acids depends on number of unsaturated double bonds

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TRUE

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Absolute all TM-helices are positioned (absolutely) vertical in membrane as depicted in schematic pictures

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FALSE

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Signalling pathways are interacting so for example different ways of signal transduction can have same/similar output. Eg. one target is phosphorylated by several cascades or separated phosphorylation and composition of a protein complex

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TRUE

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What is the role of lectins in ER quality control?

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They recognize sugars with one terminal glucose

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Q:

Fastest diffusion type of lipids within the membrane is the...

A:

uncatalyzed lateral diffusion

Q:

Which statements are correct?

A:

BIP is an HSP70 and functions as a molecular ratchet.

Q:

Which of the following are biological functions of lipids ?

A:

lipid bilayer, membrane structure

Q:

Flippases are enzymes that catalyse the transversal diffusion of lipids by providing a polar / hydrophilic environment / region for the head group while passing through the hydrophobic core region of the membrane.

A:

TRUE

Q:

Which of the following are characteristics for (Ion)channels?

A:

regulation by opening and closing of the channel

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Q:

When you draw a cell you mostly draw ...

A:

Biomembranes

Q:

Which of the following are cellular functions of biomembranes?

A:

Boundary definition: in vs. out (-->establish cell since they surround it) as well as provide cell-cell-contacts (communication pannels)

Q:

There are different Integral membrane proteins  like bi-topic or poly-topic α–helical membrane proteins, amphipatic helix or ß-barrel proteins.

A:
TRUE


Q:

Structure of fatty acids depends on number of unsaturated double bonds

A:

TRUE

Q:

Absolute all TM-helices are positioned (absolutely) vertical in membrane as depicted in schematic pictures

A:

FALSE

Q:

Signalling pathways are interacting so for example different ways of signal transduction can have same/similar output. Eg. one target is phosphorylated by several cascades or separated phosphorylation and composition of a protein complex

A:

TRUE

Q:

What is the role of lectins in ER quality control?

A:

They recognize sugars with one terminal glucose

Biomembranes

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