Lec 24

Question 1

Movement inside the cell

Answer 1

Microtubules

Question 2

Movement outside the cell

Answer 2

Cilia on airway

Question 3

RBC

Answer 3

Mobile

Can move

Question 4

Sperm cell

Answer 4

Motile

Can swim

Question 5

Diffusion

Answer 5

Net movement of molecules from regions of high concentrations to low concentrations

Ions, proteins etc

Question 6

Telomerases

Answer 6

Search for telomere DNA during S phase

Question 7

Membrane transport proteins

Answer 7

Proteins that move molecules across a membrane

Question 8

Receptor protiens

Answer 8

Proteins that deliver cargo to target organelles

Question 9

Protein assembly

Answer 9

Formation of large protein complexes

Question 10

Protein disassembly

Answer 10

Disassembly of large protein complexes

Question 11

Clathrin proteins

Protein assembly

Answer 11

Bind to membrane and form curved soccer ball shapes with a bending force

Question 12

Microtubules

Protein assembly

Answer 12

Causes a pushing force by pushing against the plasma membrane

Question 13

Protein disassembly

Anaphase

Answer 13

Shrinking microtubules during anaphase move chromosomes

Causes a pulling force

Question 14

Single motor proteins

Answer 14

Myosin-II molecule

Single headed motor protein binds to a vesicle

It then walks along a protein filament

It moves forward

Question 15

Myosins

Answer 15

+ directed actin moving along an actin filament

Moves vesicles in a circle around the cell

Question 16

Kinesin

Answer 16

Moves outward

Question 17

Dynein

Answer 17

Moves inward

Question 18

Motor protein bundles

Answer 18

Motor proteins that are attached to their tails

Cytoskeleton proteins + double headed motor proteins= bundles

Question 19

Contraction bundles

Answer 19

Contraction bundles of F-actins + myosin do cytokinesis

Question 20

Extension bundles

Answer 20

MTs and kinesins elongate animal cells during anaphase