Mock

Question 1

Explain why putting pressure on the heart helps the person.

Answer 1

• It moves blood.
• It helps oxygen move around the body

Question 2

Describe how forcing air into the person’s lungs helps the person

Answer 2

It gives oxygen which is needed for respiration

Question 3

Name one type of drug that would decrease the level of cholesterol in the person’s blood

Answer 3

Statins

Question 4

Explain how a stent works to treat coronary heart disease

Answer 4

A stent is inserted into blocked coronary arteries to keep them open
This helps blood flow

Question 5

Give two conclusions that can be made from the data in table 1

Answer 5

• Developing disease H is more likely if someone is smoking
• The risk of developing disease E is less likely than disease H

Question 6

Describe one lifestyle factor that can increase the risk of cardiovascular disease

Answer 6

• Bad diet
• Large intake of alcohol

Question 7

Where in a cell would the CF gene be found

Answer 7

Nucleus

Question 8

Describe three features of the alveoli that help maximise gas exchange

Answer 8

• They have a big surface area
• Alveoli has thin walls

Question 9

Explain how a reduced amount of oxygen entering the blood will affect the human body

Answer 9

• This will cause more anaerobic respiration which leads to becoming more out of breath and can cause tiredness

Question 10

Describe the chemical tests that could be used to show the presence of the two types of carbohydrates in cake

Answer 10

• Use iodine solution to determine wether there is starch in cake
• Iodine solution will turn from yellow or orange to black or blue if there is starch

Question 11

Explain why the bread tasted sweet

Answer 11

• Bread has glucose in it
• Glucose, sugar, will be broken down because of saliva

Question 12

Suggest one reason why the results of the investigation were not valid

Answer 12

There may be different amounts of saliva produced during each piece

Question 13

Plants contain many different tissues
Complete the sentences

Answer 13

• Palisade
• Spongy mesophyll
• Meristem

Question 14

Name one other substance that strengthens xylem tissue

Answer 14

Lignin

Question 15

Describe one change in structure that occurs when an unspecialised cell differentiates to form a phloem cell

Answer 15

It loses the nucleus

Question 16

Explain the result for the potato pieces in the 0.6 mol/sm salt concentration

Answer 16

mass is decreased because the water leaves the cells
the water leaves the cells by osmosis

Question 17

Explain why the result for the potato pieces at 1.0 mol/dm was different from the result at 0.6 mol/dm

Answer 17

mass decreases more because more water leaves cells
there is a steeper gradient

Question 18

Name one antibiotic

Answer 18

penicillin

Question 19

explain how the results in figure 5 show that the student is not correct

Answer 19

the bacterium is killed by antibiotic c
if it was resistant the bacteria would be to the edge of the disc

Question 20

suggest why doctors are concerned about antibiotic resistance

Answer 20

there will be diseases that cannot be treated
diseases have become more common

Question 21

suggest why viruses cannot be grown on agar

Answer 21

viruses need living cells in order to stay alive and reproduce

Question 22

why is it difficult for scientists to develop drugs to destroy viruses

Answer 22

drugs would need to get in the cells to kill the virus but there is a risk of cell damage

Question 23

explain the results for the three leaves

Answer 23

leaf 1 could not photosynthesise as it is covered with black paper.
leaf 2 could also not photosynthesise as it is covered with transparent plastic. This means carbon dioxide can’t get to it either.
Leaf 1 and 2 could not photosynthesise so glucose could not be turned into starch
Leaf 3 is able to photosynthesise because light and carbon dioxide can get to it. this is why leaf 3 has tested positive for containing starch

Question 24

why did the green part of the leaf test positive for starch whereas the white part tested negative

Answer 24

The green part of the leaf contains chlorophyll
Light is not absorbed by the white part of the leaf

Question 25

which ion is deficient in a plant with yellow leaves

Answer 25

magnesium

Question 26

Give the scientific term that describes the yellow colour of the leaves

Answer 26

chlorosis

Question 27

What is meant by limiting factor

Answer 27

This prevents the rate of reaction from increasing

Question 28

Describe one other change that occurs in a cell before the cell begins to divide

Answer 28

An increase in mitochondria

Question 29

Explain why a cell cannot complete division when affected by drug x

Answer 29

This makes it impossible for the fibres to get pulled to each end of the cell so the nucleus cannot divide

Question 30

Give the reason why a drug that stops cell division helps to treat cancer

Answer 30

The cancer, tumour, cannot be spread