topics that may come up

Question 1

How does bacteria make a person feel ill

Answer 1

• The bacteria produces poisonous waste products called toxins. These toxins damage tissue

Question 2

In a double blind trial, who knows who is given the trial drug and who is given the placebo?

Answer 2

• Neither the doctors nor the patient

Question 3

How do vaccines protect people against disease infections?

Answer 3

• They stimulate the white blood cells to produce antibodies

Question 4

What is used to remove a gene in genetic modification?

Answer 4

• Enzymes

Question 5

What is the first stage of drug testing?

Answer 5

• The first stage in drug testing involves computer models and cells grown in the laboratory.

Question 6

Bacteria have been genetically modified to produce what medicine?

Answer 6

• Insulin

Question 7

How does a gas turn into liquid?

Answer 7

Condensation

Question 8

How does a liquid turn into a gas?

Answer 8

Evaporation

Question 9

How does a solid turn into gas?

Answer 9

Sublimation

Question 10

How does a gas turn into solid

Answer 10

Deposition

Question 11

How does a solid turn into liquid?

Answer 11

Melting

Question 12

How does a liquid turn into solid

Answer 12

Freezing

Question 13

Define the term ‘Internal energy’

Answer 13

The total kinetic energy and potential energy of all the particles within a system

Question 14

Give two ways that the small intestine is adapted for the absorption of glucose
into the blood.

Answer 14

• large surface area
• good / rich blood supply

Question 15

Give one reason why starch molecules cannot be absorbed into the blood.

Answer 15

• starch molecules are too
  large

Question 16

What happens during the mitosis stage of the cell cycle?

Answer 16

• chromosomes move to opposite ends of the cell

Question 17

Give one factor that can cause a mutation in DNA.

Answer 17

Viruses

Question 18

What is meant by a ‘tissue’?

Answer 18

• a group of the same /similar cells

Question 19

Explain the advantage to a plant of having root hairs.

Answer 19

• increases the surface area
  so it can absorb more water

Question 20

Give one other reason why bone cells divide

Answer 20

• To grow

Question 21

Explain why the wall of the left ventricle is thicker than the wall of the right ventricle.

Answer 21

• The left ventricle pumps blood a greater distance so needs to produce a greater
  force of contraction

Question 22

What is the function of the pacemaker?

Answer 22

• Controls the resting heart rate