Lecture 6

Question 1

Kinesin proteins (motor protein)

Answer 1

Tugges onto the vesicle as it walks on the microtubules to get the proteins to where they need to go

Question 2

Microtubules

Answer 2

-Largest( 25nm )
- Microtubules are assembled from two dimers of α-and β-Tubulin proteins

Question 3

Intermediate filaments

Answer 3

• medium(8-12)
  -Intermediate filaments occur singly, in parallel bundles, and in interlinked networks

Question 4

Microfilaments

Answer 4

-smallest(5-7nm)
- Microfilaments have polarity (+and- ends)

Question 5

Plastids

Answer 5

• double membrane organelles which are found in the cells of plants and algae
• Energy + Storage
• manufacturing and storing of food.

Question 6

Chloroplasts

Answer 6

• contains the photosynthetic pigment ‘ “chlorophyll”
• captures sunlight and converts it into useful energy

Question 7

Animal cell molecules

Answer 7

giving the animal’s body its structure, absorbing nutrients to convert to energy, and helping animals move

Question 7

Central Vacuoles

Answer 7

• Large vesicles
• In plant cells
• Act as a storage space, breaks down biological molecules

Question 8

Cell walls

Answer 8

• Support individual cells
• Protect against invading bacteria and fungi
• consists of cellulose

Question 9

Cell adhesion

Answer 9

• Cell adhesion molecules are glycoproteins in the plasma membrane that bind to specific molecules on other cells
• cell adhesion molecules organize animal cells into tissue and organs

Question 10

Cell junctions

Answer 10

• Anchoring junctions:run entirely around cells, “Welding” adjacent cells together
• Gap junctions: open channels that allow ions and small molecules to pass directly from one cell to other
• Tight junctions: tight connections between membranes of adjacent cells