2.1 Cytoskeleton Flashcards Preview

A Level Biology > 2.1 Cytoskeleton > Flashcards

Flashcards in 2.1 Cytoskeleton Deck (18):
1

What are protein threads arranged as?

• microfilments
• microtubules

2

What are microfilments?

Small solid strands

3

What are microtubules?

Tiny protein cylinders

4

What are the functions of the cytoskeleton?

• support the cells organelles
• strengthens the cell and maintains its shape
• responsible for movement of materials inside the cell
• movement if the cell

5

Give an example of the movement inside the cell?

Movement of chromosomes when they separate during cell division

6

What is the cytoplasm made up of?

A network of protein threads called the cytoskeleton

7

Where are actin filaments found?

In muscle cells

8

What do actin filaments help to do?

-Move organelles in the cell
-cause movement in white blood cells

9

How big are microtubules?

25nm in diameter

10

What are microtubules made of?

A protein called tubulin

11

What do microtubules do?

- move microorganisms through liquid
- move liquid
- move organelles in cells

12

What do microtubules use to drive movement?

ATP

13

What is the cytoskeleton made up of?

Microfilments
Intermediate filaments
Microtubules

14

What is the cytoskeleton?

A complex network of fibres that resist tension to support and maintain the cells shape

15

What is the same about the elements that make up the cytoskeleton?

They are all dynamic

16

Why do the elements that make up the cytoskeleton move?

To move material inside the cell
To alter the shape of the cell
To move the cell itself

17

What do microfilaments do?

Maintaining cell shape
Muscle contraction
Cytokinesis of cell division

18

What do intermediate filaments do?

Maintain cell shape
Anchor the nucleus and organelles

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