Unit 1.5a

Question 1

Cell Division, Stage 1:

Chromosomes appear……

Answer 1

Looking threadlike

Question 2

Cell Division, Stage 2:

…… more visible and are made of …..

Answer 2

Chromosomes become ….. two identical chromatids

Question 3

Cell Division, Stage 3:

Chromatids line up at the …. and the …… disintegrates

Answer 3

….. equator …… nuclear membrane …..

Question 4

Cell Division, Stage 4:

Spindle fibres attach to the …. of the ….. pairs

Answer 4

….. centromere ….. chromatid …..

Question 5

Cell Division, Stage 5:

The spindle fibres ….. pulling the chromatids to ……… of the cell …… them together

Answer 5

…… contract …… opposite poles …… clumping ……

Question 6

Cell Division, Stage 6:

The …….. around the two separate groups

Answer 6

…. nuclear membrane reforms ….

Question 7

Cell Division, Stage 7:

The …. becomes less …. and the cytoplasm ….

Answer 7

…. chromosomes ….. visible ….. divides

Question 8

What structure is described as a network of protein fibres in the cell extending from the nucleus to the plasma membrane?

Answer 8

The cytoskeleton

Question 9

What is the purpose of the cytoskeleton?

Answer 9

To provide mechanical support and shape to cells

Question 10

What does the cytoskeleton consist of?

Answer 10

Multiple different protein structures

Question 11

What is an example of a protein structure found in the cytoskeleton of eukaryotic cells?

Answer 11

Microtubules

Question 12

What shape/structure describes a microtubule?

Answer 12

Hollow cylinder

Question 13

What are microtubules polymers made of?

Answer 13

Alternating diners of alpha and beta tublin.

Question 14

How are microtubules lengths altered?

Answer 14

By the removal or addition of tublin

Question 15

What is the polymerisation of tublin?

Answer 15

The addition of (formation of microtubule)

Question 16

What is the depolymerisation of tublin?

Answer 16

The disassembly (breakdown of microtubule)