2.1 Cells

Question 1

Function of cell membrane?

Answer 1

Controls movement of substances

Question 2

Function of cytoplasm?

Answer 2

Site of Chemical reactions (controlled by enzymes)

Question 3

Function of mitochondria?

Answer 3

Site site of aerobic respiration (energy is released)

Question 4

Function of Nucleus

Answer 4

Controls activities of the cells and contains genetic material

Question 5

Function of ribosomes

Answer 5

Site of protein synthesis

Question 6

Function of cell wall

Answer 6

Strengthens the cell or keeps it turgid. It is made up of cellulose (carbohydrate)

Question 7

Function of chloroplasts

Answer 7

Absorbs light energy for photosynthesis. Some contain chlorophyll the green pigment

Question 8

Function of vacuole?

Answer 8

Keeps the cell turgid (enlarged) and contains cell sap (sugary solution)

Question 9

What does a bacteria cell have?

Answer 9

Cell membrane, cell wall, cytoplasm, ribosomes and sometimes flagellum (tail)
NO NUCLEUS
DNA in a plasmid

Question 10

What does a fungi have?

Answer 10

Nucleus, cell membrane, cell wall, cytoplasm, mitochondria, ribosomes and vacuole

Question 11

What does a yeast cell have?

Answer 11

Nucleus, cytoplasm, cell membrane and a cell wall

Question 12

Name 4 specialised cells

Answer 12

Beta cell - creates insulin
Red blood cell - carries oxygen to body tissue
Phloem cell - Transportation of sugar
Xylem cell - Transportation of water and minerals

Question 13

How do dissolved substances move in and out of cells?

Answer 13

Via Diffusion

Question 14

Describe diffusion?

Answer 14

• The movement of spreading particles
• From a high area of concentration to a low area of concentration
• No additional energy required
• The greater the difference in concentration the faster the rate of diffusion

Question 15

What substances pass through cell membranes via diffusion?

Answer 15

Oxygen, carbon dioxide, glucose, amino acids, water and nutrients