what pigment is responsible for the yellow color of an egg. where does the yoik sit in relation to the albumen. does it float, or is it submerged? what does this tell you abour the relative densities of yolk and albumen?
Question
what pigment is responsible for the yellow color of an egg. where does the yoik sit in relation to the albumen. does it float, or is it submerged? what does this tell you abour the relative densities of yolk and albumen?
Solution
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The pigment responsible for the yellow color of an egg yolk is called xanthophylls. These are a class of oxygen-containing carotenoid pigments.
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The yolk of an egg is surrounded by the egg white, or albumen. The yolk is held in place in the center of the egg by two spiral bands of tissue called the chalazae.
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The yolk does not float in the albumen, but is suspended in it. The chalazae, which are made of a different type of protein than the albumen, keep the yolk in place.
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The fact that the yolk is suspended in the albumen and does not float tells us that the yolk and albumen have similar densities. If the yolk were less dense than the albumen, it would float. If it were more dense, it would sink.
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