The protein gp120, involved in binding to the cell surface of host cells, is a glycoprotein. This means that is linked to what non-proteinaceous molecule an oligosaccharide
Definition and Classification of Oligosaccharides :
Oligosaccharides are carbohydrate chains containing 3–10 sugar units. However, carbohydrates with up to 20 residues or even disaccharides. Oligosaccharides can be made of any sugar monomers, but most research has been carried out on fructooligosaccharides (e.g., oligofructose) and galactooligosaccharides (e.g., raffinose, human milk oligosaccharides). Few oligosaccharides are hydrolyzed and absorbed in the small intestine (e.g., maltotriose), but nearly all enter the colon intact (nondigestible oligosaccharides).
What are non - proteinaceous molecules ?
Amino acids are classified as non-protein when they are not part of the 22 such molecules that are translated into proteins by the standard genetic code. They are found in nature, both in biology and extraterrestrial chemistry.
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The answer is c the spaceing because of the passes of matter
Between Earth and Moon there is a gravitational force that exists.
