Cell structure

Question 1

Inclusion in cytosol

Answer 1

inert articles - lipids etc.

Question 2

2 main types of organelles

Answer 2

membrane bound and not

Question 3

2 main types of membrane proteins

Answer 3

1. Integral - buried in bylayer

2. Peripheral - not in bylayer, but associate with integral

Question 4

3 main functions of cell membrane

Answer 4

1. Signal transduction - receptor mediated
2. adhesion
3. transfer

Question 5

5 main types of cell transfer

Answer 5

1. Diffusion
2. Active transport
3. Bulk transfer
4. Exocytosis
5. Endocytosis

Question 6

3 types of diffusion

Answer 6

1. Simple - down gradient - fat and uncharged molecules
2. Facilitated - integral protein - no work, but selective
3. Ion channel - voltage or ligand gated

Question 7

Features of active trasport

Answer 7

requires E, against gradient

Question 8

features of bulk transfer

Answer 8

requiires E, conformational changes of membrane

Question 9

3 types of endocytosis

Answer 9

1. pinocytosis - clathrin dep
2. receptor endocytosis - clathrin dep
3. phagocytosis - clathrin INdep

Question 10

3 functions of endocytotis

Answer 10

1. bring stuff in
2. get rid of old membrane
3. reduce amount of membrane

Question 11

Function of endosome

Answer 11

like post office - sorts endocytosed complexes

Question 12

Part of nucleus

Answer 12

Nucleoplasm, DNA, envelope, pores, nucleaolus

Question 13

2 types of chroamitin and function and color

Answer 13

1. Heterochromatin - condensed - dark blue

2. Euchromitin - more easily transcribed - light blue

Question 14

Features of mitochondira

Answer 14

2 membranes

matrix - kreb cycle

Question 15

Features of ribosomes

Answer 15

• non -membrane bound

- site of protein synthesis

Question 16

Features of smooth ER

Answer 16

• no ribosomes
• site of fatty acid, phospholipd, steroid synthesis
• Ca storage

Question 17

Features of rough ER

Answer 17

• has ribosomes
• synthesize non-cytosolic proteins
• create lysosomal enzymes

Question 18

Feat of gogli

Answer 18

• pita bread
• completes glycosylation of proteins
• transports and distributes proteins

Question 19

Feat of lysosomes

Answer 19

• resistant membranes

- contain hydrolytic enzymes

Question 20

3 types of cytoskeleton

Answer 20

1. microfilaments - support cell membrane - actin
2. intermediate filaments - cell support - proteins
3. microtubules - cilia and flagella - tubulin protein dimers