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IB Biology HL B1.2.10 Hl Effect of Polar Non Polar Amino Acids Questions

Practise IB Biology HL B1.2.10 by using polar or non-polar R-groups to explain residue positions in water-soluble and membrane proteins.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Distinguish polar/hydrophilic from non-polar/hydrophobic amino-acid R-groups.
  • Explain hydrophobic-core and polar-surface positions in soluble globular proteins.
  • Relate membrane-protein residue polarity to water-facing regions and lipid tails.

IB Biology HL B1.2.10 Hl Effect of Polar Non Polar Amino Acids Questions question 1

[Maximum number: 1]

Myoglobin is a globular protein in which nearly all the non-polar R-groups point towards the inside of the molecule. The outside surface contains all the polar R-groups. What can be deduced from this?

A

Disulfide bonds occur on the inside.

B

Hydrogen bonds form with water on the outside.

C

Ionic bonds form with water on the outside.

D

Covalent bonds occur on the inside.

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