Weekly masterclass for AQA Biology Y13 Biology students - every Weds at 6.30 pm
Read moreAQA 3.1 biological molecules - 20 good practice questions on Nucleic Acids
3.1.5 - Nucleic Acids Structure and Replication
Can you
Draw the formation and hydrolysis of a phosphodiester bond
Name the parts of a nucleotide
Explain the similarities and differences between RNA and DNA
Explain why DNA is a good molecule for storing information ?
Can you describe semi-conservative replication ?
AQA 3.1 biological molecules - 10 good practice questions on carbohydrates
3.1.2
Can you
Draw the formation and hydrolysis of a glycosidic bond
Name the 3 disaccharides and their components
Explain why polysaccharides are good storage molecules ?
Explain why are branched polysaccharides good ?
Explain how are the properties of cellulose explained by the structure ?
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Revision Notes Templates - Transpiration and Light Dependent Reactions
As part of the fortnightly group tuition sessions running Mondays at 7.15pm for Alevel Biology - AQA and OCR A I am trying out these notes templates. Tonight we are covering Transpiration and the Light Dependent reactions
Read moreCalculations - Mathematical Content in A level Biology ..... Some easy some not so easy from AQA Biology
10% of the marks in Biology papers are for calculations. Here are some good practise questions and a great advice document from OCR (applicable to all boards)
Read moreLanguage Matters ....Command words in Exam questions
Some terrific guidance and definitions here - from AQA but applies to all exam boards
Read moreRepeatable or reproducible ? Valid or accurate ? Glossary of vocabulary
A great glossary of vocabulary that applies to Biology questions and answers.
Read moreCarbohydrates, lipids and Food tests - Resources to Test your understanding
Powerpoints, videos and animations, a self marking quiz on lipids and carbohydrates.
Some tips
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
Immune System - Resources to help you improve and test your understanding
Resources for learning the immune system. Powerpoints, animations, videos, self marking test and some rare immune sytem questions.
Read moreOrganelles - Test your understanding
Multiple choice questions on cell organelles, all past paper questions, a good way to assess your understanding
Read moreViruses and Prokaryotes - resources
Resources on viruses and prokaryotes
Read moreRespiration - Test your understanding, tips, resources and a quiz
Oxygen is the final electron acceptor. It oxidises the final carrier in the ETC on the inner mitochondrial membrane and is reduced to water.
Hydrogen ions flow from the inter membrane space into the matrix via ATP synthase, this electrochemical gradient phosphorylates ADP.
Hydrogen ions are pumped from the matrix into the inter membrane space, using the energy from the electrons flowing along the ETC. The electrons come from the oxidation of food, transferred by coenzymes NAD and FAD.
Glycolysis occurs in the cytoplasm. Link and Krebs in the matrix. Link and Krebs produce carbon dioxide by the removal of a carboxyl group.
Fermentation is just glycolysis with a different way of regenerating NAD (from NADH) by the reduction of pyruvate (or ethanal).
Substrate level phosphorylation is the direct addition of phosphate to ADP, occurs in glycolysis (4 ATP) and Krebs (once per turn), chemiosmosis is H ions flowing through ATP synthase.
Cristae give a larger surface area for oxidative phosphorylation
Read moreHow things cross membranes - resources and exam questions (lots of application and data analysis)
Cell membranes, osmosis, diffusion , active transport, - lots of experimental and application questions
Read moreAQA June 2017 - Past Paper 7402/01 Guide with the Markscheme
AQA released the June 2017 Biology papers - they are all available at
http://www.aqa.org.uk/subjects/science/as-and-a-level/biology-7401-7402/assessment-resources
I combined the 7402/01 paper with the markscheme to make it easier to follow and interpret. If you find it useful then please like and share.
Read moreAQA June 2017 - Past Paper 7402/02 Guide with the Markscheme
AQA released the June 2017 Biology papers - they are all available at
http://www.aqa.org.uk/subjects/science/as-and-a-level/biology-7401-7402/assessment-resources
I combined the 7402/02 paper with the markscheme to make it easier to follow and interpret. If you find it useful then please like and share.
Read moreAQA June 2017 - Past Paper 7402/03 Guide with the Markscheme
AQA released the June 2017 Biology papers
I combined the 7402/03 paper with the markscheme to make it easier to follow and interpret. If you find it useful then please like and share.
Read more