Sorbose is a stereoisomer of the sugar fructose. Its sweetness is similar to that of table sugar and it is used in the commercial production of Vitamin C. One enantiomer of sorbose, namely L‑sorbose, is shown below. L‑sorbose can exist in an open chain form (L‑sorbose) or it can cyclize to form a six-membered ring (α‑L‑sorbopyranose). Answer the questions below about L‑sorbose and α‑L‑sorbopyranose. Which of the Fischer projections (A-F) below represent L‑sorbose? Which of the chair conformations (T-Z) below represent the MOST stable conformation of α‑L‑sorbopyranose? Which of the chair conformations (T-Z) below represent the LEAST stable conformation of α‑L‑sorbopyranose? How many total stereoisomers are possible for α‑L‑sorbopyranose (including the one drawn)? How many diastereomers are possible for L‑sorbose? The anomeric center of a cyclic sugar is the newly formed chiral center resulting from the cyclization reaction. Which of the carbon atoms labeled 1-6 above is the anomeric center? Identify ONE chair conformation (T-Z) that represents the enantiomer of α‑L‑sorbopyranose. What is the relationship between the Fischer projections labeled C and F?

The use of a person’s likeness for commercial purposes without permission is appropriation.

Your Textbook reading, Practice Questions and Quizzes are immediately available to you which of the following ways:

Signing and/or taking this exam signifies you are aware of and in accordance with the Academic Honor Code of Georgia Tech and the Georgia Tech Code of Conduct. Type your name in the essay box to signify you understand this policy when taking all exams online as outlined in this course.

Select which United States coast (East or West) is associated with each type of coastal classification. 

Land heats up and cools off more quickly than oceans. 

What score do you receive for violating the testing environment conditions?

Medical or Doctor’s visits are considered 1 of the 4 acceptable excused absences according to Blinn College attendance policies.

Your regular exams allow you a window of time in which to take the 50 minute exam. What is the length of time the window is open?  

The interaction of gravitation forces from the Earth, moon, and sun cause tides.