Which of the Following Statements About N-Glycosylation of Proteins Is

question 56

Multiple Choice

Which of the following statements about N-glycosylation of proteins is not true:

• A) The oligosaccharide contains both mannose (Man) and N-acetyl- glucosamine (GlcNac) residues.
• B) The oligosaccharide is built up on the protein beginning with attachments of GlcNac to asparagine and subsequent additions of either GlcNac or Man residues from the corresponding UDP sugars.
• C) The transfer is made from a lipid intermediate called dolichol.
• D) Transfer occurs within the endoplasmic reticulum.
• E) The biosynthesis of dolichol-PP-oligosaccharide is inhibited by tunicamycin.

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Definitions:

Skin Pigmentation

The coloring of the skin caused by the presence of melanin, which can vary greatly among individuals and populations.

Phenotype

The observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences.

Height

A measurement of a person or object from base to top or head to foot in either a lying or standing position.

Skin Pigmentation

Refers to the coloring of a person's skin determined by the amount and type of melanin produced by the skin cells.