Cells and organelles

Question 1

Name the cytoskeletal filaments

Answer 1

microtubules, intermediate filament, actin filament

Question 2

What is the diameter of a microtubule?

Answer 2

25nm

Question 3

What is the diameter of the intermediate filament?

Answer 3

10nm

Question 4

What is the diameter of an actin filament?

Answer 4

7nm

Question 5

What is the function of the cytoskeleton?

Answer 5

structural support and aids movement of cells/organelles

Question 6

Name the IC fluid and give examples of what it may include

Answer 6

cytosol - ions, nucleotides, A.A, mRNA, tRNA, soluble proteins, cholesterol, lipids

Question 7

Give an example of ECM

Answer 7

basement membrane

Question 8

What does EC fluid contain?

Answer 8

ions, soluble proteins, carbs, sugars, vitamins, A.A, hormones, lipids, cholesterol

Question 9

What did eukaryotes evolve from?

Answer 9

prokaryotes that became interdependent and fused

Question 10

What alterations lead to uncontrolled cell division?

Answer 10

1) switch on/off of divide/don’t divide signals
2) loss of correction mechanism on DNA copying
3) loss of escape mechanism from cell division
4) loss of limit number of times cell can divide
5) loss of control to keep tissue in boundaries
6) ability to evade body defence mechanisms
7) ability to recruit blood vessels to growing tumour
8) ability migrate into blood stream/lymph
9) ability to metastasise