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Which of the following shows B-D-Gulose? A) B) CH2OH CH2OH OH OH OH OH H. OH OH H H ÓH C) D) E) CH2OH OH H OH OH OH H. CH2OH CH2OH H. H H. OH H H. ÓH OH H. エー

Which of the following shows B-D-Gulose? A) B) CH2OH CH2OH OH OH OH OH H. OH OH H H ÓH C) D) E) CH2OH OH H OH OH OH H. CH2OH CH2OH H. H H. OH H H. ÓH OH H. エー

Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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**Question:** What is the sugar that is shown in panel D in the last question? **Options:** - ○ L-Gulose - ○ L-Altrose - ○ D-Glucose - ○ D-Talose - ○ L-mannose (Note: There are no graphs or diagrams present in the image that require explanation.)
Transcribed Image Text:**Question:** What is the sugar that is shown in panel D in the last question? **Options:** - ○ L-Gulose - ○ L-Altrose - ○ D-Glucose - ○ D-Talose - ○ L-mannose (Note: There are no graphs or diagrams present in the image that require explanation.)
### Understanding the Structure of Gulose #### Open Chain Form of Gulose The image illustrates Gulose in its open chain form, which is depicted as follows: - **CHO** at the top. - The carbon atoms are connected vertically with alternating groups: - **C** connected to an **H** and **OH**. - **C** connected to an **H** and **OH**. - **C** connected to an **HO** and **H**. - **C** connected to an **H** and **OH**. - At the bottom, connected to the last carbon is **CH2OH**. #### Identifying β-D-Gulose The question posed is: “Which of the following shows β-D-Gulose?” There are five cyclic structures labeled from A to E: - **A)** A six-membered ring with OH groups in varying positions. - **B)** A six-membered ring similar to A, with different OH and H orientations. - **C)** Another six-membered ring; features differ in the spatial arrangement of OH and H groups. - **D)** Another structural variant with a distinct orientation of OH and H groups. - **E)** Features a different configuration of OH and H groups from the other options. Each structure includes: - A ring structure symbolizing the cyclic form. - Functional groups attached at different points indicating specific stereochemistry. The task is to match these structures to the β-anomeric form of D-Gulose by examining the orientation of the hydroxyl groups in each cyclic structure.
Transcribed Image Text:### Understanding the Structure of Gulose #### Open Chain Form of Gulose The image illustrates Gulose in its open chain form, which is depicted as follows: - **CHO** at the top. - The carbon atoms are connected vertically with alternating groups: - **C** connected to an **H** and **OH**. - **C** connected to an **H** and **OH**. - **C** connected to an **HO** and **H**. - **C** connected to an **H** and **OH**. - At the bottom, connected to the last carbon is **CH2OH**. #### Identifying β-D-Gulose The question posed is: “Which of the following shows β-D-Gulose?” There are five cyclic structures labeled from A to E: - **A)** A six-membered ring with OH groups in varying positions. - **B)** A six-membered ring similar to A, with different OH and H orientations. - **C)** Another six-membered ring; features differ in the spatial arrangement of OH and H groups. - **D)** Another structural variant with a distinct orientation of OH and H groups. - **E)** Features a different configuration of OH and H groups from the other options. Each structure includes: - A ring structure symbolizing the cyclic form. - Functional groups attached at different points indicating specific stereochemistry. The task is to match these structures to the β-anomeric form of D-Gulose by examining the orientation of the hydroxyl groups in each cyclic structure.
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Carbohydrates are polyhydroxy aldehydes or ketones which are associated with reducing property and each carbohydrate is composed of carbon, hydrogen, and oxygen which are arranged in the empirical formula CnH2nOn.

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