amino acids
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is the general formula for amino acids? | RCH(NH2)COOH
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| Which is the simplest amino acid? | glycine
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| What is a zwitterion? | A dipolar ionic form of the amino acid caused by the internal transfer of a hydrogen ion
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| What is the isoelectric point? | The pH at which there is no net electric charge
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| Are the isoelectric points at pH 7? | No, every amino acid has its own isoelectric point
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| What causes the different isoelectric points? | The R group
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| What does amphoteric mean? | They can react with both acids and bases
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| How does the amino acid behave when at a pH that is more acidic than the isoelectric point? | It behaves as a base and accepts a proton to form a positive ion
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| How does the amino acid behave when at a pH that is more alkaline than the isoelectric point? | It behaves as an acid and donates a proton to form a negative ion
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| If the isoelectric point is pH 6.5 and the amino acid is at pH 1, how does it behave? | As a base
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| Which molecules are amino acids used to make? | Peptides and proteins
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| How many amino acids does the body use to assemble proteins? | 20
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| Which reaction joins amino acids? | Condensation
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| Which bond joins amino acids? | Amide or peptide link
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| What is eliminated during condensation? | Water
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| What is a protein? | A long chain of amino acids
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| How are proteins broken down? | Hydrolysis
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| How many types of hydrolysis are there? | 2
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| What are the conditions for acid hydrolysis? | Heat under reflux with 6moldm-3 HCl for 24 hours
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| What are the conditions for alkaline hydrolysis? | Aqueous sodium hydroxide at 100 C
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| What are the products of alkaline hydrolysis? | Carboxylate salts
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| What form of isomerism do amino acids show? | Optical isomerism
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| What is a chiral carbon? | A carbon atom attached to 4 different groups
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Created by:
AnnabelS
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