AQA GCSE Biology Core Final Exam
And Correct Answers.
Define metabolic rate - Answer The rate at which reactions take place within the body, particularly
within cellular respiration
What is a balanced diet? - Answer A diet that includes everything needed to keep the body healthy
Why do different people need different diets? - Answer People need different amounts of energy
because the metabolic rate varies between person to person
Which food groups are used by the body to release energy and build cells? - Answer Carbohydrates,
fats and proteins
Why are mineral ions and vitamins needed? - Answer They allow the body to work properly and keep
healthy
What happens if someone has an unbalanced diet? - Answer They become malnourished
Factors that affect someones metabolic rate - Answer Age
Gender
Proportion of muscle to fat
Amount of exercise
Inherited genes
What can obesity lead to? - Answer Type 2 diabetes
How can you reduce this risk? - Answer Eat less carbohydrates and do more exercise
, What can happen if people eat too little food? - Answer Bones become brittle, women's periods may
stop, find it hard to walk
Why do you need 'good' cholesterol? (HDL) - Answer For cell membranes and to make vital substances
It decreases the risk of heart disease and flows in the bloodstream removing 'bad' cholesterol (LDL)
What happens if you have high levels of 'bad' cholesterol? (LDL) - Answer Increased risk of heart
disease and strokes
What do Pathogens cause? - Answer Infectious diseases
What are Pathogens? - Answer they are tiny microorganisms which are usually bacteria or viruses
How do bacteria or viruses make you fell ill? - Answer Once they enter the body they produce toxins
which are kinds of poisons. Viruses are smaller than bacteria and reproduce inside cells, the damage to
cells make you feel ill as well.
Who discovered the washing hands reduced the risk of spreading diseases? - Answer Semmelweiss
What defense mechanisms does the body have against pathogens? - Answer The skin, trapped by
mucus, killed by stomach acid and white blood cells
White blood cells are part of the immune system, what 3 things do they do the defend the body? -
Answer -Ingest pathogens. This means they digest and destroy them
-They produce antibodies to help destroy particular pathogens
-They produce antitoxins to counteract the toxins that pathogens produce
What do antibiotics do? - Answer They kill infective bacteria within the body
What did Alexander Flemming discover in 1928? - Answer Penicillin
And Correct Answers.
Define metabolic rate - Answer The rate at which reactions take place within the body, particularly
within cellular respiration
What is a balanced diet? - Answer A diet that includes everything needed to keep the body healthy
Why do different people need different diets? - Answer People need different amounts of energy
because the metabolic rate varies between person to person
Which food groups are used by the body to release energy and build cells? - Answer Carbohydrates,
fats and proteins
Why are mineral ions and vitamins needed? - Answer They allow the body to work properly and keep
healthy
What happens if someone has an unbalanced diet? - Answer They become malnourished
Factors that affect someones metabolic rate - Answer Age
Gender
Proportion of muscle to fat
Amount of exercise
Inherited genes
What can obesity lead to? - Answer Type 2 diabetes
How can you reduce this risk? - Answer Eat less carbohydrates and do more exercise
, What can happen if people eat too little food? - Answer Bones become brittle, women's periods may
stop, find it hard to walk
Why do you need 'good' cholesterol? (HDL) - Answer For cell membranes and to make vital substances
It decreases the risk of heart disease and flows in the bloodstream removing 'bad' cholesterol (LDL)
What happens if you have high levels of 'bad' cholesterol? (LDL) - Answer Increased risk of heart
disease and strokes
What do Pathogens cause? - Answer Infectious diseases
What are Pathogens? - Answer they are tiny microorganisms which are usually bacteria or viruses
How do bacteria or viruses make you fell ill? - Answer Once they enter the body they produce toxins
which are kinds of poisons. Viruses are smaller than bacteria and reproduce inside cells, the damage to
cells make you feel ill as well.
Who discovered the washing hands reduced the risk of spreading diseases? - Answer Semmelweiss
What defense mechanisms does the body have against pathogens? - Answer The skin, trapped by
mucus, killed by stomach acid and white blood cells
White blood cells are part of the immune system, what 3 things do they do the defend the body? -
Answer -Ingest pathogens. This means they digest and destroy them
-They produce antibodies to help destroy particular pathogens
-They produce antitoxins to counteract the toxins that pathogens produce
What do antibiotics do? - Answer They kill infective bacteria within the body
What did Alexander Flemming discover in 1928? - Answer Penicillin
