Page 125 - SUBSEC October 2017_Neat
P. 125
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(ii) Although enzymes can be classified as globular proteins, not all globular proteins, for
example, haemoglobin, are enzymes. Using your knowledge of protein structure,
describe THREE protein structural levels present in haemoglobin. Include in your
description, the bonds present at EACH structural level.
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[6 marks]
(iii) Haemoglobin is a major component of red blood cells, which are examples of
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eukaryotic cells. A student makes the following observations of two given cell
types:
Observations
Cell 1 contains DNA, ribosomes, cell membrane and cell wall
Cell 2 contains DNA, ribosomes, Golgi apparatus, rough endoplasmic reticulum,
cell membrane and cell wall.
From these observations, indicate the cell that is prokaryotic and the cell that is
eukaryotic.
Prokaryotic ............................................................................................................
Eukaryotic .............................................................................................................
[1 mark]
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