DP Chemistry Questionbank
B.10 Stereochemistry in biomolecules (HL only)
Description
[N/A]Directly related questions
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17M.3.hl.TZ1.17:
Vision is dependent on retinol (vitamin A) present in retina cells. Retinol is oxidized to the photosensitive chemical 11-cis-retinal and isomerizes to 11-trans-retinal on absorption of light.
Outline how the formation of 11-trans-retinal results in the generation of nerve signals to the brain.
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17M.3.hl.TZ2.12a:
Identify the structural feature which enables rhodopsin to absorb visible light.
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17M.3.hl.TZ2.12b:
Outline the change that occurs in the retinal residue during the absorption of visible light.
- 20N.3.hl.TZ0.8c: The diverse functions of biological molecules depend on their structure and shape. Retinal is...
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17N.3.hl.TZ0.15b:
Retinal is the key molecule involved in vision. Explain the roles of cis and trans-retinal in vision and how the isomers are formed in the visual cycle.
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18M.3.hl.TZ1.8b:
Outline why cellulose fibres are strong.
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18M.3.hl.TZ2.10b:
Explain how the structure of vitamin A is important to vision using section 35 of the data booklet.
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18M.3.hl.TZ2.8e:
Sketch the wedge and dash (3-D) representations of alanine enantiomers.
- 18N.3.hl.TZ0.10c.i: Outline the difference between their structures.
- 18N.3.hl.TZ0.10c.ii: Outline why cellulose is an essential part of human diet.
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19M.3.hl.TZ1.9c:
Aspartic acid is obtained synthetically as a racemic mixture. Draw the three‑dimensional shape of each isomer showing their spatial relationship to each other. Use section 33 of the data booklet.
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19M.3.hl.TZ2.12b:
Classify, giving your reason, the hexose (six-membered) ring of sucrose as an α or β isomer.
- 19N.3.hl.TZ0.15b: Compare and contrast the structures of starch and cellulose. One similarity: One difference:
