Dextrans are polysaccharides produced by some bacteria. They are polymers of α-D-glucose linked by α(1 → 6) glycosidic bonds, with frequent α(1 → 3) branching. Choose the correct portion of a dextran, including one branch point. Dextrans are polysaccharides produced by some bacteria. They are polymers of -D-glucose linked by (1 → 6) glycosidic bonds, with frequent (1 → 3) branching. Choose the correct portion of a dextran, including one branch point.

This question is incomplete

Explanation:

This question is incomplete, however the question seeks to test the students ability to identify a dextran. The question already gives a brief description of a dextran hence the attachment provides a visual representation of what has been described in the question.

Dextrans are polysaccharides made up of individual glucose units (monomers) that are joined together by α(1 → 6) glycosidic bonds (as seen in the second diagram of the attachment); i.e the C-1 (illustrated as α-1 in the attachment) of one glucose unit is linked to the C-6 (illustrated as α-6 in the attachment) of another glucose unit by glycosidic bond. These dextran polymers are also characterized by branches from α(1 → 3) [as seen in the second diagram of the attachment]; i.e the C-1 (illustrated as α-1 in the attachment) of the branch glucose molecule is attached to the C-3 (illustrated as α-3 in the attachment) of a glucose unit in the polymer chain of the dextran.

b. lithosphere, asthenosphere, mesosphere   is the answer most likely