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Proteoglycan: Quiz


Question 1: Here they form large complexes, both to other proteoglycans, to hyaluronan and to fibrous matrix proteins (such as ________).
Collagen, type I, alpha 1CollagenLysyl hydroxylaseKeratin

Question 2: Glycosylation of the proteoglycan occurs in the ________ in multiple enzymatic steps.
Cell (biology)Golgi apparatusEndoplasmic reticulumCell nucleus

Question 3: An inability to break down proteoglycans is characteristic of a group of ________, called mucopolysaccharidoses.
Episodic ataxiaGenetic disorderAndrogen insensitivity syndromeAlport syndrome

Question 4: The small leucine-rich repeat proteoglycans (SLRPs) include ________, biglycan, fibromodulin and lumican.
BMPR1AMothers against decapentaplegic homolog 2ACVR1BDecorin

Question 5: Examples of large proteoglycans are aggrecan, the major proteoglycan in cartilage, and ________, present in many adult tissues including blood vessels and skin.

Question 6: They are also involved in binding cations (such as sodium, potassium and ________) and water, and also regulating the movement of molecules through the matrix.

Question 7: They have a core ________ with one or more covalently attached glycosaminoglycan (GAG) chain(s).

Question 8: The chains are long, linear carbohydrate polymers that are negatively charged under physiological conditions, due to the occurrence of ________ and uronic acid groups.
SulfateSulfurGlobal dimmingOxygen

Question 9: Proteoglycans are a major component of the animal ________, the "filler" substance existing between cells in an organism.
CollagenHistologyElastic fiberExtracellular matrix

Question 10: The protein component of proteoglycans is synthesized by ________ and translocated into the lumen of the rough endoplasmic reticulum.
MitochondrionCell (biology)RibosomeCell nucleus


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