B1 Cell biology

Question 1

How do you prepare a slide for a microscope

Answer 1

– add a drop of water to the middle of a clean spied
– carbon onion and separate into layers
– place it into the water on the slide to
– add a drop of iodine to highlight objects in the soul
– place a coverslip over the top

Question 2

What are the stages of the cell cycle

Answer 2

Growth
DNA replication
Mitosis

Question 3

What is diffusion

Answer 3

The spreading out of particles from an area of high concentration to an area of low concentration

Question 4

What is osmosis

Answer 4

The movement of water across a partially permeable membrane from a region of high water concentration to region of low water concentration

Question 5

What do root hair cells do

Answer 5

They taking minerals and water

It has a large surface area in order to absorb minerals and ions needed for healthy growth, the concentration of the minerals it easily higher in the roots than they are within the soil

Question 6

What is active transport

Answer 6

Substance absorbing against the concentration gradient

Question 7

What is villi and what is good about them

Answer 7

They are inside the small intestine and they are the little projections

Thank recent service area so that digestive food is absorbed so much quicker into the blood
– They have a good blood supply to assist quick absorption

Question 8

What are the conversions between different sizes

Answer 8

1 m = 100 cm
1 cm = 10 mm
1 mm = 1000um
1um = 1000nm

Question 9

What does um mean

Answer 9

Micrometers