Answers
DYLAN ANDERSON
0
,Contents
Paper 1...................................................................................................................................................2
Cells Structures & Processes (SB1).....................................................................................................2
Microscopes...................................................................................................................................2
Plant and Animal Cells...................................................................................................................4
Specialised cells.............................................................................................................................5
Inside bacteria...............................................................................................................................5
Enzymes and nutrition...................................................................................................................6
Testing foods.................................................................................................................................6
Enzyme action................................................................................................................................7
Transporting substances................................................................................................................8
Cells & Control (SB2)..........................................................................................................................8
Mitosis...........................................................................................................................................8
Growth in animals..........................................................................................................................9
Growth in plants............................................................................................................................9
Stem cells.......................................................................................................................................9
The brain......................................................................................................................................10
Brain and spinal cord...................................................................................................................10
The nervous system.....................................................................................................................11
The eye........................................................................................................................................12
Neurotransmission speeds...........................................................................................................13
Genetics (SB3)..................................................................................................................................14
Sexual and asexual reproduction.................................................................................................14
Meiosis.........................................................................................................................................14
DNA..............................................................................................................................................15
Protein synthesis..........................................................................................................................15
Genetic variants and phenotypes................................................................................................16
Mendel.........................................................................................................................................16
Alleles..........................................................................................................................................17
Inheritance...................................................................................................................................17
Multiple and missing alleles.........................................................................................................17
Gene mutation.............................................................................................................................17
Variation......................................................................................................................................18
Natural Selection & Genetic Modification (SB4)..............................................................................18
Evidence for human evolution.....................................................................................................18
, Darwin’s theory...........................................................................................................................19
Development of evolution theory................................................................................................19
Classification................................................................................................................................20
Breeds and varieties....................................................................................................................20
Tissue culture...............................................................................................................................21
Genes in Agriculture and Medicine..............................................................................................21
GM an Agriculture........................................................................................................................21
Fertilisers and biological control..................................................................................................22
Health, Disease, and the Development of Medicines (SB5).............................................................22
Health and Disease......................................................................................................................22
Non-communicable disease.........................................................................................................23
Cardiovascular disease.................................................................................................................23
Pathogens....................................................................................................................................24
Spreading pathogens...................................................................................................................24
Virus life cycles.............................................................................................................................25
Plant defences.............................................................................................................................26
Plant diseases..............................................................................................................................26
Physical and chemical barriers.....................................................................................................27
The immune system.....................................................................................................................27
Antibiotics....................................................................................................................................28
Monoclonal antibodies................................................................................................................28
Paper 2.................................................................................................................................................29
Plant Structures & Function (SB6)....................................................................................................29
Homeostasis (SB7)...........................................................................................................................29
Animal Exchange & Transport (SB8)................................................................................................29
Ecosystems & Material Cycles (SB9)................................................................................................29
Checklist..............................................................................................................................................29
Paper 1
Cells Structures & Processes (SB1)
Microscopes
Recall what an electron microscope is
An electron microscope has a higher resolution, it can see smaller subcellular structures, like
ribosomes, and magnification than a light microscope. It uses electron light beams.
Recall what is meant by an instrument’s resolution
The ability to distinguish between two points on an inch (the amount of detail).