4. Biological Membrane Structure Flashcards Preview

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Flashcards in 4. Biological Membrane Structure Deck (16)
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1
Q

What are the functions of the cell membrane?

A

Physical barrier
Transportation
Receptors to stimuli
Structural support

2
Q

Phosphate group + serine

A

Phosphatidylserine

3
Q

Phosphate group + ethanolamine

A

Phosphatidylethanolamine

4
Q

Phosphate group + choline

A

phosphatidylcholine (lecithin)

5
Q

Phosphate group + inositol

A

Phosphatidyllinositol

6
Q

What types of sphingolipids can be found in the cell membrane?

A

Sphingomyelins
Cerebosides
Gangliosides

7
Q

What is the function of cholesterol within the cell membrane?

A

Modulates fluidity

8
Q

What is the meaning of the fluid mosaic model?

A

Plasma membrane is a mosaic of components that move around freely and fluidly in the plane of the membrane

9
Q

Name 3 forms of integral proteins

A

Single alpha helix
Multiple alpha helices
Beta sheet

10
Q

Name 4 forms of peripheral proteins

A

Alpha helix embedded in bilayer
Protein attached to lipid chain
Protein attached to phosphatidylinositol
Non covalent interaction between proteins

11
Q

What are the functions of membrane proteins?

A
Anchoring
Recognition
Enzymes
Receptors
Carrier proteins
Leak channels
Gated channels
12
Q

What complex molecules may carbohydrates be components of?

A

Proteoglycans
Glycoproteins
Glycolipids

13
Q

What are the functions of the glycocalyx?

A
Lubrication and protection
Anchor
Locomotion
Specificity in binding
Recognition
14
Q

Name 2 examples of primary active transport

A

Na/K pump

Hydrogen Potassium ATPase

15
Q

Name an example of secondary active transport

A

Na/glucose transporter

16
Q

Name an example of group translocation

A

Phosphotransferase system