Things I need to work on that I can't remember

Question 1

How does smoking cause disease?

Answer 1

Smoking causes a person’s arteries to become blocked. This prevents blood from flowing properly, and can cause heart attack or stroke.

Question 2

Food tests - Sugar- ?

Answer 2

Benedict’s solution in hot water bath it turns red/ yellow.

Question 3

Food tests - Protein - ?

Answer 3

Biuret solution is a mixture of copper sulphate and sodium hydroxide solutions this turns pink/ purple.

Question 4

Food tests - Lipids - ?

Answer 4

Add ethanol and water and the solution will go milky.

Question 5

Food tests - Starch - ?

Answer 5

Add some iodine and it goes black.

Question 6

What is Kwashiorkor?

Answer 6

Protein Malnutrition

Question 7

What is Pellagra?

Answer 7

Lack of vitamin Niacin

Question 8

What is Goitre?

Answer 8

Swelling of the throid gland which causes a lump in your neck.

Question 9

What is Rickets?

Answer 9

Lack of vitamin D and calcium

Question 10

What is Scurvy?

Answer 10

Lack of vitamin c

Question 11

What does Alcohol do to you?

Answer 11

Affects your nervous system and damages your liver.

Question 12

What does Tobacco do to you?

Answer 12

Smoking increases your risk of cancer, as well as lung and heart disease.

Question 13

What are the 1 of the 2 main layers the leaf is divided into? Palisade Layer

Answer 13

Palisade Layer - Contains cells packed with chloroplasts. This is where most of a plants photosynthesis occurs.

Question 14

What are the 1 of the 2 main layers the leaf is divided into? Spongy Layer

Answer 14

Spongy layer- Contains air spaces, allowing dioxide to diffuse out of the leaf.

Question 15

What are the different gene banks?

Answer 15

Seed banks - dried seeds of plants of plants are stored at low temperatures.

tissue banks - buds and other cells from plants are stored.

Cryo banks - a seed or embryo is preserved at very low temperatures, normally in liquid nitrogen.

Pollen banks - pollen grains are stored

Question 16

DNA: Which scientist carried out experiments using peas and what did they discover?

Answer 16

Gregor Mendel

He noticed that certain characteristics such as height and colour are passed from parents to their offspring.

Question 17

What is convection?

Answer 17

Happens in liquids and gases. Heat rises. Part of a fluid that is warmer than the rest rises and sets up a convection current.

Question 18

What is conduction?

Answer 18

Vibrations passed between colliding particles in a solid.

Question 19

What is radiation?

Answer 19

Thermal energy transferred through radiation. Passes through gases and some solids, it can pass through vacuum.

Question 20

Put the electromagnetic waves in order from most energy to least energy.

Answer 20

Gamma Rays, x-rays, UV, Visible light, Infrared, microwaves, radio waves

Question 21

What are the different types of enzymes?

Answer 21

Carbohydrase which break down carbohydrates into sugar molecules.

Protease which break down into proteins into amino acids.

Lipase which breaks down lipids into fatty acids and glycerol. This process is helped by bile.

Question 22

How is DNA arranged?

Answer 22

Into long strands called chromosomes.

Question 23

Electromagnets: what is a coil of wire called?

Answer 23

Solenoid