B1.2 Proteins

B1.2 Proteins Quiz

IB Biology HL: Quiz

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5 questions, one answer each

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  1. 1. How many peptide bonds are in a single chain of 80 amino acids?

    • A. 80
    • B. 79
    • C. 81
    • D. 40

  2. 2. HL: Which bond is covalent and forms between two cysteines?

    • A. Hydrogen bond
    • B. Ionic bond
    • C. Disulfide bond
    • D. Hydrophobic interaction

  3. 3. HL: In alpha helices, hydrogen bonds form between:

    • A. R-groups of cysteines
    • B. C=O and N–H groups of the backbone
    • C. Haem groups
    • D. Phosphate groups

  4. 4. HL: Which is a conjugated protein?

    • A. Insulin
    • B. Collagen
    • C. Haemoglobin
    • D. Titin

  5. 5. HL: Why is collagen suited to a structural role?

    • A. It is globular and soluble
    • B. Its triple helix forms strong, insoluble fibres
    • C. It binds oxygen
    • D. It has only one polypeptide chain

Quiz