Powerpoints, videos and animations, a self marking quiz on lipids and carbohydrates.
Number the carbons and understand when and how a 1,4 glycosidic bond forms.
Why it matters that you can form a 6,1 bond in order to branch a polysaccharide.
Why does it matter that polysaccharides are insoluble and mono and di-saccharides are soluble.
What is the consequence of Beta glucose forming cellulose
Which molecules have a 5 carbon sugar in mammals ?
Can you explain why fatty acids are non-polar and what is the consequence for the formation of cell membranes
Resources for learning the immune system. Powerpoints, animations, videos, self marking test and some rare immune sytem questions. Read More
Multiple choice questions on cell organelles, all past paper questions, a good way to assess your understanding Read More
Resources on viruses and prokaryotes Read More
The new style linear A level Biology exams have a very different approach to assessment so I made recorded lessons of guides to the new specification sample and 2017 A level papers and to the 2016 AS Papers. This one is available for free on my VOD site Read More
Powerpoints and notes, a pack of long data analysis exam questions and a test on photosynthesis
Tips for Photosynthesis
LDR - occurs on the thylakoid membranes. Limiting factor is light intensity
Phosphorylates ADP (through chemiosmosis) - creates the Hydrogen ion gradient by the flow of electrons along the ETC in the thylakoid membrane. The flow of electrons is driven by the capturing of light by a range of different pigments which channel the energy to a chl a molecule at the reaction centre of the photosystem - which then loses an electron.
Reduces NADP with an electron from splitting water (photolysis) at PSII.
Light Independent Reaction (reduction of carbon dioxide) - occurs in the stroma (the cytoplasm of the chloroplast).
Limited by speed and quantity of RUBISCO enzyme (kinetic energy - temperature) and substrate concentration (Carbon dioxide)
Needs the products of the LDR - ATP and NADPH
NADPH and ATP are used to regenerate RUBP
Each time the Calvin cycle turns, a single Carbon is reduced. 3 turns - one extra Triose Phosphate. 6 turns - 2 extra TP = 1 extra glucose.
TP is the source of all of the carbon in all plants (and hence in all heterotrophes) - Amino acids, DNA, RNA, phospholipids etc
Cell membranes, osmosis, diffusion , active transport, - lots of experimental and application questions Read More
Protein Synthesis - exam questions a quiz and powerpoints, videos and animations, please like and share Read More
AS OCR Breadth in biology H020/01 June 2017 Multiple Choice Questions as an auto-marking online quiz Read More
Plant transport guide - videos, powerpoints, questions Read More
OCR released the OCR A June 2017 H420 papers. I combined the Biological DIversity 420/02 paper with the markscheme to make it easier to follow and interpret. Read More
OCR released the OCR A June 2017 H420 papers. I combined the Unified Biology 420/03 paper with the markscheme to make it easier to follow and interpret. Read More
OCR released the OCR A June 2017 H420 papers. I combined the Biological Processes 420/01 paper with the markscheme to make it easier to follow and interpret. Read More
Which maths skills you need to practise for the new specification A-level Biology - excellent resources from OCR - also applies to AQA and Eduqas, lots of great practice questions
The quantity of maths in the 2017 specification is a challenge to many students - so I put together a summary of all of the OCR A new spec questions with some element of data analysis.
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Good practice if you are struggling with data analysis questions
Pack of challenging past paper questions with lots of Data Analysis and application - A-level Biology past paper questions - good for OCR and AQA specifications Read More
Pack of past paper questions on Osmosis and Water potential - I have tried to include one question of each type Read More
There is plenty of excellent guidance on how to plot graphs and draw tables in the OCR practical booklet ..... pdf
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Prompting some festive recapping ? - Looking back at first year A-level Biology topics
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Another from the past.
Terrific question about DNA, diffusion, ATP production and fireflies going out in a blaze of glory....
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