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8700679
Biology A2
Description
A-Level Biology (Biology) Mind Map on Biology A2, created by Holly Bamford on 27/04/2017.
No tags specified
biology
a level
aqa
a2
sadness
biology
a-level
Mind Map by
Holly Bamford
, updated more than 1 year ago
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Created by
Holly Bamford
over 7 years ago
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Resource summary
Biology A2
Photosynthesis
Light-dependent reactions
Light Independent reactions
Respiration
Aerobic
Glycolysis
Phosphorylation
Glucose->2xTP
Using 2xATP
Oxidation
TP->Pyruvate
ADP + Pi -> ATP
NAD->redNAD
Link Reaction
Pyruvate -> acetyl CoA
Decarboxylation
NAD->redNAD
Krebs Cycle
Anaerobic
Alcoholic Fermentation
Lactate Fermentation
Energy and Ecosystems
Biomass
Measuring biomass
Dry mass
Low temp.
Dry to constant
Carbon is ~50% of dry mass
Estimate energy in biomass using caliorimetry
Productivity
Primary
Gross Primary Production (GPP)
Total amount of chemical energy convert by plants from light energy
Net Primary Production (NPP)
~50% of GPP lost as plants respire
NPP=GPP-R
Net Production of Consumers (N)
N= I - (F+R)
Nutrient Cycles
Nitrogen
Steps
Ammonification
Nitrogen compounds converted to ammonia
By saprobionts
In dead organisms
In urine and faeces
Nitrification
Ammonium ions converted to nitrates
Nitrifying Bacteria
Oxygen required
Nitrogen Fixation
N2 converted to nitrogen compounds
By bacteria
Form mutualistic relationship
Denitrification
Nitrates converted to N2
Denitrifying Bacteria
Role of microorganisms
Mycorrhizae
Symbiotic relationship
Hyphae
Increase SA
Saprobionts
Feed on dead plants and animals
Extracellular digestion
Phosphate
Weathering
Saprobionts
Mycorrhizae
Increase assimilation
Eutriphication
Leaching
Stimulate Algal bloom
Blocks light
Plants can't photosynthesise
No oxygen produced
Plants die
More bacteria
Anaerobic conditions
Fish die
Respire more
Survival and Response
Plants
Tropism
IAA
Roots
Inhibits growth
Shoots
Elongates
Geotropism
Roots
Positive
Shoots
Negative
Phototropism
Roots
Negative
Shoots
Positive
Animals
Taxes
Kinesis
Structure of Nervous system
Parasympathetic
Rest and Digest
Sympathetic
Fight or Flight
Receptors
Pacinian Corpuscle
Strech-mediated Na ion channels
Generator potential
Lamellea
Light receptors
Rods
Low acuity
B&W
Cones
High accuity
Colour
Reflex Arc
Control of Heart Rate
Receptors
Chemoreceptors
Aorta carotid arteries and medulla
Detect O2 level
Baroreceptors
Aorta and carotid arteries
Detect pressure
Pressure
CO2
Nerve Impulses
Action potential
Structure
Movement of Ions
Synaptic Transmission
Cholinergic Synapse
Summation
Skeletal Muscle Contraction
Structure
Neuromuscular Junction
Contraction
Homeostasis
Negative Feedback
Restores levels back to the norm
Positive Feedback
Amplifies change away from the norm
Importance of Homeostasis
Temperature
pH
Enzyme activity
Attachments:
Biology~AS
Control of Blood Glucose
Too High
Too Low
Secondary Messenger Model
Respiration
Ψ
Control of Blood Water Potential
Kidney
ADH
Inheritance
Monohybrid
Dihybrid
Codominant
Epistatsis
Autosomal Linkage
Sex Linkage
Populations
Hardy-Weinberg
Equation
Assumptions
Evolution and Speciation
Speciation
Allopatric
Sympatric
Selection
Stabilising
Directional
Disruptive
Populations in Ecosystems
Sucession
Primary
Secondary
Mark-Release-Recapture
Gene Mutations
Mutations
Frame-Shift
Types
Substitution
Deletion
Addition
Duplication
Inversion
Translocation
Mutagenic agents
Act as a base
Alter Bases
Change the structure
Gene Expression
Epigentic control
Methylation of DNA
Methyl group added to CpG site
Transcription enzymes no longer complementary
Decrease transcription
Hypermethylation=more growth
Hypomethylation=less growth
Acylation of Histones
Increases transcription
Chromosomes less condensed
of TSG results in less growth
Regulation of Transcription and Translation
RNAi
Stops transcription of mRNA
Oestrogen
Oestrogen-Oestrogen receptor complex
siRNA
miRNA
Using Genome Projects
Appreciate them!
Recombinant DNA
Making DNA fragments
Cloning
In Vitro
In Vivo
Use of Marker Genes
Heritable Conditions
DNA probes
Genetic counselling
Genetic Fingerprinting
Variable Tandem repeats
Forensic Uses
Cancer
Tumours
Types
Malignant
Cancerous
Fast growing
Can break and spread around body
Bengin
Not cancerous
But can become cancerous
Fiborous
Cause blocakges
Slow growing
Pressure on organs
Tumour suppressor genes
slow cell division
Protooncogenes
stimulate cell division
Stem cells
iPS Cells
Totipotent
Any
Pluripotent
Any-placenta
Unipotent
One
Multipotent
Few
Cardiomyocytes
Some regenerative abilities
Few unipotent cells
Media attachments
Electronchain (image/png)
Calvin (image/png)
Krebs Cycle (image/png)
Acetylation (image/png)
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