C15 intracellular compartments Flashcards Preview

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Flashcards in C15 intracellular compartments Deck (20):
1

What formed ER membrane

invagination of plasma membrane

2

Organelles import proteins from cytosol through ?

protein translocators

3

Newly synthesized proteins are directed to proper locations by ?

signal sequences

4

Nuclear transport through nuclear pore summary

nuclear transport receptor hydrolyzes GTP to bind cargo protein. nuclear pore fibrils attach to receptor and assist in pulling cargo in. GTP binds to receptor releasing cargo. receptor leaves nucleus.

5

Protein import into chloroplast and mitochondria require ?

signal sequence and energy to unfold protein

6

Are used to direct mitochondrial and chloroplast proteins to appropriate cellular loaction

targeting sequences

7

Proteins destined for ER contain signal sequence at ? terminal

N termnal

8

Uses ER signal to direct ribosome to ER membrane

signal recognition particle

9

signal sequences are removed using ?

signal peptidase

10

transmembrane proteins require ? or ? signals

stop-transfer or internal start-transfer

11

SNARE proteins

target vesicles to the right organelle. complementary v and t snares bind to each other

12

protein glycosylation

carbohydrates added as proteins are synthesized across ER.

13

modifications in golgi

carbohydrates added in ER removed. other carbs added. other modifications. aggregate and packed into vesicles.

14

constitutive secretion

unregulated vesicle membrane fusion

15

pinocytosis

ingestion of fluid and molecules via small vesicles

16

phagocytosis

ingestion of large particles by phagocytic cells

17

macrophages use ? when scavenging red blood cells

phagocytosis

18

lysosome membranes are ? to prevent digestion

glycosylated

19

lysosomes have ph of 5 and contain many ?

hydrolases

20

function of cop1, cop2 and clathrin

generate vesicle from portion of plasma membrane. help package cargo into vesicles.