FINAL cytoskeleton and organelles Flashcards Preview

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Flashcards in FINAL cytoskeleton and organelles Deck (31):
1

what is the diameter of an actin filament

7nm

2

diameter of an intermediate filament

10nm

3

diameter of a microtubule

25 nm

4

which cytoskeletal filaments act as train tracks for organelles and vesicles

microtubules

5

which cytoskeletal filaments are involved in endocytosis

actin

6

the type of junction which connects the basal surface of cells to a basement membrane

hemidesmosome

7

type of junction which attaches actin in one cell to actin in another cell

adherens

8

type of junction responsible for the flow of ions in heart muscle cells

gap

9

type of junction that prevents the leakage of fluids

tight

10

organelle that is essentially a small sac of digestive enzymes that functions in degrading worn out organelles

lysosomes

11

which organelle is the site of new membrane synthesis in a cell

smooth ER

12

which organelle receives proteins and lipids from the ER modifies them and dispatches them

golgi

13

which organelle sorts ingested molecules and recycles some back into the plasma membrane

endosome

14

which organelle contains enzymes used in a variety of oxidative reactions that break down lipids and destroy toxic molecules

peroxisomes

15

organelle that is the site of final protein modification

golgi

16

organelle that contains hydrolytic enzymes

lysosome

17

protein modification begins in which organelle

rough ER

18

how do proteins know to enter the ER

signal sequence

19

autophagy

lysosome breaks down dead/dying organisms

20

what organelle contains enzymes to make a peroxide

peroxisomes

21

avg number of mitochondria per cell

1700

22

avg number of lysosomes per cell

300

23

t/f most eukaryotic cells have one nucleus

true

24

organelle that is the site of lipid synthesis

smooth ER

25

list three ways proteins are imported in eukaryotic cells

1) across nuclear pores
2) directly across organelles
3) transport by vesicles

26

what is protein modification; examples

specialization; glycoproteins and lipoproteins

27

which organelle organizes and stores chromosomes

nucleus

28

proteins and lipids leave the ER via a

membrane bound vesicle

29

everything in the cell except the nucleus is termed

cytoplasm

30

energy related organelle which converts sugar to ATP

mitochondria

31

organelle involved in protein synthesis

ribosome