Lec 19

Question 1

Actin filaments structure

Answer 1

Subunit protein- Globular actin (G actin)

Protein filament- Actin filament (F actin)

Question 2

Actin filaments assemble through

Answer 2

Treadmilling

One F-actin is added to the plus end, resulting in one falling off the minus end

Question 3

Minus end binding protein

Answer 3

Prevents the loss of actin

Question 4

Protein Bind plus end

Answer 4

Prevents the insertion of more actin

Question 5

Middle binding protein

Answer 5

Organize actin into a structure

Question 6

Cut middle protein

Answer 6

Cuts actin along the midline

Question 7

F-actin formation is desirable during

Answer 7

Cell crawling and phagocytosis

Question 8

Nucleating proteins

Answer 8

Anchors minus end and allows plus end to grow

Question 9

ARP complex

Answer 9

Nucleating protein

Question 10

F-actin stability example

Answer 10

Intestine cell contains microvilli and cell cortex

Question 11

Cross-linking proteins

Answer 11

Filamin in the cell cortex that cross-links

Question 12

Bundling proteins

Answer 12

Villin holds acting together in bundles