2. Organisation EQ
P+MtQs 5/8/20
Amylase is the enzyme that controls the breakdown of starch to glucose. Describe how the student
could investigate the effect of pH on the breakdown of starch by amylase.
Indicative content
• Range of at least 3 pH values / use of buffer solutions
• control variables / keep amount or concentration of starch and amylase the same
• keep temperature the same using water bath / electric heater
• use iodine test to make qualitative observations
• observe colour changes at different temperatures
• do repeats at each pH
A healthy diet contains the right balance of different foods and the right amount of energy. (a) An
unbalanced diet can lead to health problems. One problem caused by an unbalanced diet is being
overweight. Name one health problem, other than being overweight, that is linked to an unbalanced
diet.
(Type 2) diabetes / heart disease / deficiency disease / named
allow a relevant health problem
ignore obesity or over / under weight / anorexia
Match yp the drug to the correct information
Cannabis May cause mental illness in some people
Steroid Used to increase muscle growth
Stimulant Used to boost heart rate
Thalidomide Used to treat leprosy
Suggest one other factor that a doctor might consider before deciding which treatment to use for a
patient.
any one from:
• side effects
, allow cost
• other medication
allow patient choice
• other (medical) conditions
allow family history or age
Isomerase:
Changes glucose syrup into fructose syrup
P+Mt QS 7/8/20
Name three chemical substances transported by the plasma.
any three from: • amino acids • antibodies • antitoxins • carbon dioxide • cholesterol • enzymes • fatty
acid • glucose • glycerol • hormones / named hormones • ions / named ions • proteins • urea •
vitamins • water.
In this question you will be assessed on using good English, organising information clearly and using
specialist terms where appropriate. White blood cells are part of the immune system. White blood cells
help the body to defend itself against pathogens. Describe how pathogens cause infections and describe
how the immune system defends the body against these pathogens.
Examples of biology points made in the response:
• bacteria and viruses are pathogens
credit any ref to bacteria and viruses
• they reproduce rapidly inside the body
• bacteria may produce poisons / toxins (that make us feel ill)
• viruses live (and reproduce) inside cells (causing damage).
white blood cells help to defend against pathogens by:
• ingesting pathogens / bacteria / (cells containing) viruses
credit engulf / digest / phagocytosis
• to destroy (particular) pathogen / bacteria / viruses
• producing antibodies
P+MtQs 5/8/20
Amylase is the enzyme that controls the breakdown of starch to glucose. Describe how the student
could investigate the effect of pH on the breakdown of starch by amylase.
Indicative content
• Range of at least 3 pH values / use of buffer solutions
• control variables / keep amount or concentration of starch and amylase the same
• keep temperature the same using water bath / electric heater
• use iodine test to make qualitative observations
• observe colour changes at different temperatures
• do repeats at each pH
A healthy diet contains the right balance of different foods and the right amount of energy. (a) An
unbalanced diet can lead to health problems. One problem caused by an unbalanced diet is being
overweight. Name one health problem, other than being overweight, that is linked to an unbalanced
diet.
(Type 2) diabetes / heart disease / deficiency disease / named
allow a relevant health problem
ignore obesity or over / under weight / anorexia
Match yp the drug to the correct information
Cannabis May cause mental illness in some people
Steroid Used to increase muscle growth
Stimulant Used to boost heart rate
Thalidomide Used to treat leprosy
Suggest one other factor that a doctor might consider before deciding which treatment to use for a
patient.
any one from:
• side effects
, allow cost
• other medication
allow patient choice
• other (medical) conditions
allow family history or age
Isomerase:
Changes glucose syrup into fructose syrup
P+Mt QS 7/8/20
Name three chemical substances transported by the plasma.
any three from: • amino acids • antibodies • antitoxins • carbon dioxide • cholesterol • enzymes • fatty
acid • glucose • glycerol • hormones / named hormones • ions / named ions • proteins • urea •
vitamins • water.
In this question you will be assessed on using good English, organising information clearly and using
specialist terms where appropriate. White blood cells are part of the immune system. White blood cells
help the body to defend itself against pathogens. Describe how pathogens cause infections and describe
how the immune system defends the body against these pathogens.
Examples of biology points made in the response:
• bacteria and viruses are pathogens
credit any ref to bacteria and viruses
• they reproduce rapidly inside the body
• bacteria may produce poisons / toxins (that make us feel ill)
• viruses live (and reproduce) inside cells (causing damage).
white blood cells help to defend against pathogens by:
• ingesting pathogens / bacteria / (cells containing) viruses
credit engulf / digest / phagocytosis
• to destroy (particular) pathogen / bacteria / viruses
• producing antibodies
