What is the bond between two monosaccharides called?
Glycosidic Bond
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What is formed between the condensation of: glucose and glucose?
Maltose and water
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What is formed between the condensation of: glucose and fructose?
Sucrose and water
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What is formed between the condensation of: glucose and galactose?
Lactose and water
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Name the test for reducing sugars?
Benedicts Test
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How do you carry out the benedicts test?
Add Benedicts and heat for 5 minutes in hot water bath.
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If a reducing sugar is present what colour does it go and what does it not go?
If present: brick red. If no present blue
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How do you carry out a test for non reducing sugars?
Add HCl and NaOH to neutralise, heat and carry out benedicts test. If present brick red.
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How do you use a colourimeter and a callibration curve to carry out a benedicts test?
1. Make different concentrations and carry out benedicts test. 2. Use colorimiter to measure absorbance and transmission. 3. Plot callibration curve and use to find concentration.
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Name the three polysaccharides?
Starch, Glycogen and Cellulose
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What is the function of starch?
Energy storage in plants
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What are the adaptations of starch?
Helical- compact for enrgy storage, alpha glucose, branched so easily hydrolysed into energy and osmotically balanced preveting uptake of water; osmotic lysis.
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What is the test for starch?
the iodine test
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How do you carry out the iodine test?
Add iodine, if present it turns blue/black, if none present turns orange
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What is the function of Glycogen?
Energy storage in animals in liver and muscles
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What are the adaptations of glycogen?
Helical, branched- increased surface area for easy hydrolysis for energy, alpha glucose and osmotically balanced- doesn't draw up water; osmotic lysis
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What is the function of cellulose?
For strength and support in cell wall
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What are the adaptations of cellulose?
Beta glucose and unbrached straight chained- support cell wall, hydrogen bonds group to form microfibrils- provide strength and osmotically balanced- preventing uptake of water; osmotic lysis
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Other cards in this set
Card 2
Front
What is a hydrolysis reaction?
Back
The breaking down of a large molecule to make smaller molecules by adding water
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