Download B2 - John Ferneley College

GCSE Additional Science - Biology(B2)
Controlled Assessment (ISA) will make up 25% of your Additional Science
final grade.
The other 75% will come from the 3 exam papers – modules B2, C2 and
P2 (each worth 25%).
Exam Content
Animal and Plant Cells
Identify 5 organelles common to animal and plant cells.
Identify the 3 additional organelles in plant cells.
State the function of all 8 organelles.
Describe the structure and function of at least 4 different
specialised cells.
Explain how the structure of these cells (i.e. organelles)
enable them to fulfil their function.
Outline structural differences (i.e. shape/organelles)
between yeast, bacteria and virus cells.
Identify organelles present in yeast and bacteria cells.
Compare the structure of yeast and bacteria to animal and
plant cells.
Diffusion
Define diffusion in cells as the movement of substances
down a concentration gradient across a partially
permeable membrane.
Describe how diffusion occurs using the concept of a
concentration gradient.
Explain how increasing the temperature increases the rate
of diffusion.
Digestive Tissues and Organs
Describe how a tissue is formed.
Identify the location and function of the main digestive
organs.
Describe how muscular, glandular and epithelial tissues
enable digestive organs to perform their functions.
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Plant Tissues and Organs
Identify the main organs of a plant.
Construct a diagram to show interpret leaf structure.
Identify the tissues found in a leaf and describe their
functions.
Photosynthesis
Explain why plants need to create their own energy source.
Write the word and [balanced (HT)] symbol equations for the
photosynthesis reaction.
Explain the importance of light and chlorophyll in
photosynthesis.
Describe three uses of glucose in a plant.
Explain how light intensity, temperature and carbon dioxide
concentration can limit the rate of photosynthesis.
Interpret graphs showing the effect of these limiting factors.
Plan, carry out and present data for an investigation into one
limiting factor.
Proteins and Enzymes
State that proteins are made of amino acids, and give
examples of some common proteins.
Describe the structure and general function of enzymes.
Explain how the shape of the active site is determined by the
order of amino acids in that region of the enzyme (HT).
Enzyme Activity
Explain how changes in temperature and pH can denature
enzymes.
Interpret graphs showing the effects of temperature and pH
on enzyme activity.
Plan, carry out and present data for an investigation into the
effect of temperature or pH on enzyme activity.
Uses of Enzymes
Identify the target organs and functions of three digestive
enzymes.
Explain how digestive enzymes help to digest food.
Describe how enzymes are used in washing detergents, baby
foods and in the production of slimming foods.
Respiration
Describe why organisms need energy from respiration.
Write the word and [balanced (HT)] symbol equations for
aerobic respiration.
Write the word equation for anaerobic respiration.
State where within a cell aerobic and anaerobic respiration
occurs.
Explain what the ‘oxygen debt’ is, when it is made, and how
to reduce its affects (HT).
Cell Division
Describe the process of mitosis.
Describe the process of meiosis.
Compare both processes.
Stem Cells
Describe a stem cell as an undifferentiated cell, which can
differentiate into any specialised cell.
Identify the location of adult and embryonic stem cells.
Explain the uses of stem cells in the body.
Describe the uses of stem cells in medicine.
Explain the ethical issues associated with the use of
embryonic stem cells.
Explain the ethical issues associated with the use of
embryonic stem cells.
Genes and Inheritance
Describe what happens at fertilisation.
Use sex chromosomes to explain the chance of producing a
male or female baby.
Describe the relationship between DNA, chromosomes and
genes.
Describe the difference between dominant and recessive
alleles.
Genes and Inheritance 2
Interpret punnet squares and genetic tree diagrams to predict
the outcome of monohybrid crosses.
Construct a punnet square to show the predicted ratios of
genotypes and phenotypes of monohybrid crosses including
homozygous and heterozygous alleles (HT).
Interpret genetic tree diagrams to predict the genotypes of
individual family members (HT).
Explain the terms genotype, phenotype, heterozygous and
homozygous (HT).
Inherited Diseases
State that Cystic Fibrosis is a recessive disease, requiring two
recessive alleles.
State that Polydactyly is a dominant disease, only requiring
one allele.
Describe the symptoms of both inherited diseases.
Explain ethical issues associated with embryo screening for
these diseases.
Distribution of Organisms
Explain how the distribution of animals and
plants is affected by temperature, light,
and the availability of water, nutrients,
oxygen and carbon dioxide.
Sampling Techniques
Describe how to use a quadrat and a line
transect to obtain random and systematic
samples.
Fossils, Extinction and Speciation
Describe how fossils are formed and
explain how they provide evidence for
evolution.
Explain how environmental changes,
disease, predation, competition and
sudden catastrophic events can cause the
extinction of a species.
Explain how new species develop from
geographical isolation.
Explain how new species develop from
genetic variation, natural selection and
speciation (HT).
How can I work on this subject?
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Make sure you understand all of the content in the table above using the
revision guide.
Revise all of the content above using the revision guide.
Make a keyword dictionary or cue cards. Try and link keywords.
Make a spider diagram linking keywords or topic areas.
Practise exam questions using past papers from the AQA website.
Practise skills you are not confident with such as answering long answer
questions or your timings on answering questions in exam conditions.
Resources you might need:
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GCSE AQA Additional Science Revision Guide
GCSE AQA Additional Science Workbook
Past exam papers
Kerboodle log-in details
BBC Bitesize
My GCSE Science (www.my-gcsescience.com)