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- 1. Multiple Choice
Are these statements about amino acids true or false?
Amino acids behave as both acids and bases
true
false
- 2. Multiple Choice
Are these statements about amino acids true or false?
In the solid state amino acids exists as zwitterions
true
false
- 3. Multiple Choice
Are these statements about amino acids true or false?
Amino acids undergo addition polymerisation to form polypeptides
true
false
- 4. Multiple Choice
Are these statements about amino acids true or false?
Peptide links can undergo hydrolysis by reflux with hydrochloric acid
true
false
- 5. Multiple Choice
Are these statements about amino acids true or false?
The primary structure of the protein is how the chains fold into -pleated and coil into -helixtrue
false
- 6. Multiple Choice
What's the correct definition of these keywords?
condensation polymerisation
A type of polymerisation in which two molecules react via a hydrolysis reaction
A type of polymerisation in which two molecules react with the addition of a molecule of water
A type of polymerisation in which two molecules react with the elimination of a water molecule
- 7. Multiple Choice
What's the correct definition of these keywords?
zwitterions
Amino acid molecules with a negative charge on the amine group in the form of COO- and a positive charge on the carboxylic acid group in the form of NH3+
Amino acid molecules with a positive charge on the amine group in the form of NH3+ and a negative charge on the carboxylic acid group in the form of COO-
Amino acid molecules with a negative charge on the amine group in the form of NH3- and a positive charge on the carboxylic acid group in the form of COO+
- 8. Multiple Choice
What's the correct definition of these keywords?
polyester
A condensation polymer formed from a dicarboxylic acid and an alkene
An addition polymer formed from a dicarboxylic acid and a diol
A condensation polymer formed from a dicarboxylic acid and a diol
- 9. Multiple Choice
What's the correct definition of these keywords?
addition polymerisation
A type of polymerisation where monomer molecules add together to form a peptide bond
A type of polymerisation in which unsaturated monomers (e.g. alkenes) undergo addition reactions with themselves to form polymers.
A type of polymerisation in which two molecules react with the elimination of a molecule of water
- 10. Multiple Choice
What's the correct definition of these keywords?
polyamide
An addition polymer formed from a dicarboxylic acid and a diol
An condensation polymer formed from a dicarboxylic acid and a diol
An condensation polymer formed from a dicarboxylic acid and a diamine
- 11. Multiple Choice
What's the correct definition of these keywords?
peptide bond
The bond formed when two amino acids join by a condensation reaction to form a peptide, and represented by -CONH-
The bond that maintains a protein's tertiary structure, and which forms between two cysteine amino acids
The bond formed when two amino acids join by a condensation reaction to form a peptide, and represented by -CNOH-
- 12. Multiple Choice
Which of these statement about polymers is not correct?
Polyesters are condensation polymers
Alkenes and halogenoalkenes can form addition polymers
Addition polymers are always made up of two different types of monomer
- 13. Multiple Choice
Which of these statements is not correct?
Addition polymers formed from alkenes do not biodegrade
Condesation polymers may photodegrade
All condensation polymers biodegrade within a couple of years
- 14. Multiple Choice
Which of these structures is a zwitterion?
- 15. Multiple Choice
The structure below is the amino acid valine. What is its structure when in a solution of high pH?
- 16. Multiple Choice
The stucture below is the amino acid glycine. What is its structure when two glycine molecules form a peptide bond?
- 17. Multiple Choice
Hydrogen bonds do not play a part in which level of structure of a protein?
primary
secondary
tertiary
- 18. Multiple Choice
Why are many enzymes soluble in water?
They contain large numbers of hydrogen bonds
They contain many amino acids with hydrophilic side chains
they contain an active site
- 19. Multiple Choice
Which statements refer to condensation polymers?
functional group of monomers: C=C
functional group of monomers: COOH, OH
formed by a reaction in which water is formed
e.g. Terylene, nylon, Kevlar
do not biodegrade, making disposal difficult
- 20. Multiple Choice
Which statement refers to addition polymers?
formed by unsaturated molecules adding together
formed by a reaction in which water is formed
e.g. polythene, Teflon
do not biodegrade, making disposal difficult
biodegradable by hydrolysis and are easy to recycle
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