1002 4th PDf

Question 1

Endocytosis is

Answer 1

Eukaryotic cells are able to take up macromolecules and particles from surrounding medium

Question 2

Endocytosis types

Answer 2

1- phagocytosis
2- pinocytosis
3- receptor-mediated endoeytosis

Question 3

Phagocytosis is the function of two white blood cells:

Answer 3

Macrophages
Neutrophils granulocytes

Question 4

Steps of phagocytosis

Answer 4

Binding to the receptors
Extension of pseudopodia
Pseudopodia surrounds the particle
Phage comes fuse with lysosomes

Question 5

Roles of phagocytosis

Answer 5

Defense against invading microorganisms
Eliminate aged or damaged cells

Question 6

Pinocytosis

Answer 6

Liquid

Question 7

Receptor mediated endocytosis

Answer 7

Obtain essential nutrients

Question 8

Rm endocytosis

Answer 8

Binding of ligand
Concentration of Catherine

Question 9

Cholestro) is transported through the

Answer 9

Bloodstream as lipoprotein particles LDL

Question 10

LDL contains

Answer 10

1500 molecules of cholestery) esters in a core

Question 11

LDL core is surrounded

Answer 11

By acoat containingphospholipids / cholesterol and one molecular of apoprotein B 100

Question 12

Adaptins are proteins that

Answer 12

Binding clathrin to membranes by second class of protein

Question 13

Tail includes

Answer 13

Internalization signal which bind to adaptin,
Adaptin binds Cathrin

Question 14

Vesicle budding

Answer 14

Require energy and other proteins

Question 15

Dynamic forms a ring around the neck of

Answer 15

Invaginated pits

Question 16

FH

Answer 16

Very high levels of serumcholesterol
Suffer from heart attacks
Premature atherosclerosis

Question 17

LDL mutations (not able to internalize LDL)
2 types

Answer 17

Most → fail to bind LDL
Few → bind LDL but were unable to internalize it