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Melting Temperature of Phosphatidylcholine with Identical Fatty Acid Chains Quiz

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Melting Temperature of Phosphatidylcholine with Identical Fatty Acid Chains Quiz

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Questions and Answers

What is the purpose of a hydropathy plot in protein sequences?

To determine the lateral diffusion rate

To locate the membrane-spanning helices (correct)

To visualize FRAP

To measure the melting temperature of phosphatidylcholine

How is lateral diffusion in membranes defined?

The constant motion of lipids and membrane proteins (correct)

The process of visualizing FRAP

The destruction of fluorescent molecules

The melting process of phosphatidylcholine

What does a peak of +84 kJ mol−1 or more indicate on a hydropathy plot?

High FRAP activity

Presence of porin proteins

Possible membranespanning α helix (correct)

Stable membrane fluidity

How are biological membranes described in the text?

Dynamic and not rigid Signup and view all the answers

Which process can be visualized for proteins using FRAP?

Lateral diffusion Signup and view all the answers

What technique involves labeling a cell-surface component with a fluorescent chromophore?

FRAP Signup and view all the answers

What is destroyed (bleached) during the FRAP process?

Fluorescent molecules in a region Signup and view all the answers

How are lipids and many membrane proteins constantly moving in membranes?

By visualizing lateral diffusion Signup and view all the answers

What does a high FRAP activity imply?

Constant motion of lipids and proteins Signup and view all the answers

What is the main purpose of fluorescence recovery after photobleaching (FRAP)?

Visualize lateral diffusion of lipids and proteins Signup and view all the answers