B5//2

Question 1

How is RBS spread

Answer 1

Wind

Question 2

Give an example of a protist disease

Answer 2

Malaria

Question 3

Give 4 examples of the human defence against pathogens

Answer 3

Nasal hair
Skin
Stomach
Sticky mucus in lungs

Question 4

How does the skin prevent disease

Answer 4

Produced anti microbial fluid

Question 5

How does the stomach prevent disease

Answer 5

Produced HCl

Question 6

Give 4 ways a plant prevents disease

Answer 6

Tough waxy cuticle
Bark
Thorns
Mimicry

Question 7

What is a malignant tumour

Answer 7

A tumour that can spread

Question 8

How do we grow culture

Answer 8

Pour hot sterile agar gel into a petri dish
Inoculate the sterile gel using a wire loop
Provide warmth and oxygen

Question 9

What do aphids eat

Answer 9

Sugar rich sap in phloem

Question 10

What kill aphids?

Answer 10

Lady birds

Question 11

What is chorlesterol

Answer 11

A waxy like fatty substance

Question 12

What is COPD

Answer 12

Chronic obstructive pulmonary disease caused by tar

Question 13

what is the solution to test for carbs

Answer 13

iodine which will turn from orange to black

Question 14

how can we test for sugar

Answer 14

add benedicts solution to the test tube and place in a half full beaker and leave for 5 mins and should turn bricks red

Question 15

how can we test for protein

Answer 15

add biruet solution and should change from blue to purple

Question 16

how can we test for lipids

Answer 16

do not filter solution then add distilled water and ethanol to the test tube and stir and should turn cloudy