Exam 14: Biomolecules: Carbohydrates

Instructions: Convert the Fischer projections into tetrahedral representations, and assign R or S stereochemistry to each. Convert and assign:

What is the correct structure for a-D-glucopyranose?

Draw the Fisher projection of L-mannose.

Convert the following Fisher projections into tetrahedral representations.

Instructions: Refer to the monosaccharides below to answer the following question(s). Refer to instructions. Assign R or S configuration to each chirality center in sorbose.

Instructions: Convert the Fischer projections into tetrahedral representations, and assign R or S stereochemistry to each. Convert and assign:

Instructions: Refer to the monosaccharides below to answer the following question(s). Refer to instructions. Provide the complete name for the a-anomer of rhamnose in its pyranose form.

Instructions: Refer to D-idose below to answer the following question(s). Refer to instructions. The Fischer projection for D-idose (above) corresponds to which pyranose below?

Instructions: Draw structures for the products you would expect to obtain from reaction of b-D-galactopyranose with the listed reagents. Be sure to include all relevant stereochemistry. b-D-galactopyranose Draw:

The monosaccharide shown below is

Draw the structure of the product of the following reaction.

Which of the following has a D-configuration?

Instructions: Refer to the sugars below to answer the following question(s). Choose the sugar that best fits each description. There is only one correct answer for each question, but sugars may be used more than once. Indicate each answer by the corresponding letter. Refer to instructions. _____ a dextrorotary hexose and ______ a levorototary tetrose.

Instructions: Draw structures for the products you would expect to obtain from reaction of b-D-galactopyranose with the listed reagents. Be sure to include all relevant stereochemistry. b-D-galactopyranose Draw:

Instructions: Consider the reaction below to answer the following question(s). Refer to instructions. Q and Z are cyclic examples of:

Instructions: Refer to the monosaccharides below to answer the following question(s). Refer to instructions. Draw both chair conformations of the a-anomer of rhamnose in its pyranose form. Circle the more stable conformation.

Instructions: Refer to the monosaccharides below to answer the following question(s). Classify each sugar by type; for example, glucose is an aldohexose. Refer to instructions. Erythrulose is ____________________.

Instructions: Consider the reaction below to answer the following question(s). Refer to instructions. Place a triangle around the anomeric carbon in compound Q.

Instructions: Consider the reaction below to answer the following question(s). Refer to instructions. Which anomer is the LEAST stable? Q or Z

Which of the following is a disaccharide?