Carbohydrates, Ions and Elements - OCR A Multiple Choice Questions
Self-marking multiple choice quiz for Carbohydrates, Ions and Elements. Using OCR A past paper exam questions.
OCR A Carbohydrates Quiz
Multiple Choice Quiz - OCR A Carbohydrates
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Group tutoring topics and Y13 & Y12 OCR A and AQA small group information
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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Multiple Choice Quiz - OCR A Biochemistry
Practising recall and doing questions is so important for long term retention of information. Try this self marked quiz. OCR A Biochemistry.
Practising recall is so important for retention and learning. Try this quiz without books first !
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Carbohydrates, 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
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
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A-level Biological Molecules - 11 basic points to help you learn
10 Basic points to remember for Biological Molecules
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1. 99% of life is Carbon, Hydrogen, Oxygen and Nitrogen (and a bit of Phosphate)
2. Mono is one, Di (and Bi) is two, Tri is three, oligo is a few, poly is many.
3. Anything ending in -ose is a sugar, -ol is a lipid. - ase is an enzyme and all enzymes are proteins
4. Beta glucose is only in Cellulose - everything else is Alpha glucose
5. A condensation reaction makes water and joins two monomers together - glycosidic bond is a condensation reaction
6. A hydrolysis reaction breaks a bond (lysis means split) - with the addition of water (hydro)
7. A Glycosidic bond joins 2 monosaccarides together
8. A peptide bond joins 2 amino acids together (many-poly, by peptide bonds...=polypeptide)
9. A lipid is made from a glycerol joined by an ester bond to 3 (tri) fatty acids - hence triglyceride
10. Carbohydrates and lipids are just C,H,O. Amino acids are C,H,O,N (ok, and a bit of Sulphur with 2 of the R groups), Nucleic acids (DNA, RNA, ATP) have C,H,O,N,P. Phospholipids are C,H,O,P.
11. Large or non-polar molecules are insoluble in water hence Starch, Glycogen and Fats are osmotically inactive which means they are good energy storage molecules