Amino acids, dipeptides and polypeptides

Last updated: 17/02/2022

WJEC A-Level Chemistry Unit 4.7 – Amino acids, peptides and proteins Amino acids, dipeptides and polypeptides

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Question 1 of 19

1. Question
What monomers are proteins made from?
- Amino acids
- Nucleotides
- Glucose
- Fatty acids
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Question 2 of 19

2. Question
What is the name of this type of group (-COOH)?
- Carboxyl group
- Hydroxyl group
- Amine group
- Methyl group
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Question 3 of 19

3. Question
What is the name of this type of group (-NH2)?
- Amine group
- Carboxyl group
- Hydroxyl group
- Methyl group
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Question 4 of 19

4. Question
In amino acids, what is represented by the letter ‘R’?
- Side chain
- Amine Group
- Hydroxyl group
- Peptide bond
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Question 5 of 19

5. Question
What type of reaction occurs between two amino acids?
- Condensation
- Hydrolysis
- Reduction
- Oxidation
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Question 6 of 19

6. Question
What type of bond is formed between two adjacent amino acids?
- Peptide bond
- Glycosidic bond
- Ester bond
- Hydrogen bond
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Question 7 of 19

7. Question
What is formed by the condensation of two individual amino acids?
- Dipeptide
- Monosaccharide
- Disaccharide
- Polypeptide
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Question 8 of 19

8. Question
Peptide bonds are broken down by which type of enzyme catalysed reaction?
- Hydrolysis
- Reduction
- Oxidation
- Condensation
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Question 9 of 19

9. Question
The twenty amino acids that are common in all organisms differ only in what part of their structure?
- Side group
- Amine group
- Carboxyl group
- Hydroxyl group
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Question 10 of 19

10. Question
Almost all of the 20 common amino acids end with what suffix?
- …ine
- …ase
- …ose
- …ein
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Question 11 of 19

11. Question
Peptide bonds form between which groups of the amino acids?
- Amine and Carboxyl groups
- Amine and Side groups
- Carboxyl and Side groups
- Amine and hydroxyl groups
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Question 12 of 19

12. Question
Disulfide bridges form between two molecules of which amino acid?
- Cysteine
- Alanine
- Phenylalanine
- Aspartic acid
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Question 13 of 19

13. Question
Which statement correctly describes disulfide bridges?
- It is a covalent bond
- It is an ionic bond
- It is a glycosidic bond
- It is important in determining the primary structure of proteins
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Question 14 of 19

14. Question
Which statement correctly describes disulfide bridges?
- It bonds together different parts of the polypeptide chain
- It determines the primary structure
- It is formed by hydrolysis
- It binds two molecules of sulfide to a single part of a polypeptide chain
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Question 15 of 19

15. Question
Peptide bonds form between which groups of the amino acids?
- NH2 and -COOH
- NH2 and -R
- COOH and -R
- NH2 and -OH
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Question 16 of 19

16. Question
Which statement correctly describes the role of hydrogen bonds in proteins?
- It bonds together different parts of the polypeptide chain
- It bonds together adjacent amino acids in a polypeptide chain
- It determines the primary structure
- It is formed by hydrolysis
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Question 17 of 19

17. Question
Ionic bonds help stabilize which structure of proteins
- Tertiary
- Primary
- Secondary
- Quaternary
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Question 18 of 19

18. Question
The arrangement of protein subunits leads to which structure?
- Quaternary
- Primary
- Secondary
- Tertiary
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Question 19 of 19

19. Question
Peptide bonds are formed by which type of reaction?
- Condensation
- Reduction
- Oxidation
- Hydrolysis
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