Carbohydrates - Oligosaccharides & Polysaccharides

Question 1

What amino acids do Oligosaccharides attach to to from Glycoproteins?

Answer 1

1. Serine (O atom on the side chain)
2. Threonine (O atom on the side chain)
3. Asparagine (N atom on the side chain)

Question 2

What is a main function of Oligosaccharides?

Answer 2

To protect the cell surface from mechanical and chemical damage

Question 3

What glycoproteins enable HIV to attach and fuse with target cells?

Answer 3

gp120 (surface protein) and gp41 (transmembrane protein)

Question 4

What enzymes are associated with the HIV viral genome?

Answer 4

1. RT
2. Integrase
3. Protease

Question 5

What receptor on the target cell does the surface protein (gp120) on HIV bind to?

Answer 5

CD4 then changes conformation and binds to chemokine receptor CCR5

Question 6

What are the three stages of HIV infecting a target cell?

Answer 6

1. Binding
2. Fusion
3. Entry

Question 7

What two classes are polysaccharides divided into?

Answer 7

1. Homopolysaccharide (1 monosaccharide type)

2. Heteropolysaccharide (2 or more monosaccharide types)

Question 8

What two polysaccharides make up starch?

Answer 8

1. Amylose

2. Amylopectin