Exam 21: Biomolecules: Carbohydrates

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

Draw structures for the products you would expect to obtain from reaction of β-D-galactopyranose with the listed reagents. Be sure to include all relevant stereochemistry. β-D-galactopyranose -Draw: Br₂, H₂O

Refer to the monosaccharides below to answer the following question(s). Classify each sugar by type; for example, glucose is an aldohexose.a. Sorbose b. Rhamnose c. Erythrulose d. Xylulose -Refer to instructions. Sorbose is ____________________.

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.

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

The specific rotation of the pure α-anomer of a monosaccharide is +169.7 and that of the pure β-anomer is +29.4. A solution of the pure α-anomer produces a specific rotation of +61.4. Based on this data, which of the following is correct?

Treatment with dilute NaOH can convert

Which of the following is a disaccharide?

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.

Refer to the monosaccharides below to answer the following question(s). a. Sorbose b. Rhamnose c. Erythrulose d. Xylulose -Refer to instructions. Provide the complete name for the α-anomer of rhamnose in its pyranose form.

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. -Draw the Fisher projection of L-mannose.

Which of the following has a D-configuration?

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. _____ oxidizes to an optically inactive aldaric acid.

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

Refer to the carbohydrate below to answer the following questions. a)Which carbon in the carbohydrate is the anomeric carbon? b)Does this represent an α or β-anomoer?

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. -Complete the equation for the following reaction.

Draw an aldopentose with S,S,R stereochemistries at its carbons 2 through 4.

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 ketose and _____ an aldose with two chirality centers

Draw structures for the products you would expect to obtain from reaction of β-D-galactopyranose with the listed reagents. Be sure to include all relevant stereochemistry. β-D-galactopyranose -Draw: NaBH₄ in H₂O

Choose a structure from the list provided below that best fits the description given. There is only one correct answer for each question. -A reducing monosaccharide