но 6 НО 4 5 3 ОН What type of cyclic sugar is formed? ОН 2 1 ОН A) glucose B) furanose C) pyranose D) hexanose С БI +

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Please answer both of the following 

The image presents a question regarding the structure of D-altrose in its cyclic form, as depicted by a Haworth projection. The task is to identify the type of cyclic sugar formed.

### Structure Analysis:
The diagram in the image shows the Haworth projection of D-altrose. It is a six-membered ring structure, typical of pyranoses. The ring includes five carbon atoms and one oxygen atom, making it a hexagon.

### Options for Answer:
- **A) Glucose**: Not applicable as the question asks for the type of cyclic structure, not the specific sugar.
- **B) Furanose**: Incorrect, since a furanose is a five-membered ring, contrasting with the six-membered structure shown.
- **C) Pyranose**: Correct, reflecting the six-membered ring structure seen in the diagram.
- **D) Hexanose**: Incorrect choice; hexanose refers to a six-carbon sugar, not specifically the cyclic structure type.

### Correct Answer:
C) Pyranose

This answer is highlighted in the image, indicating it as the correct choice. The answer reflects the structural feature of the sugar based on its six-membered ring formation.
Transcribed Image Text:The image presents a question regarding the structure of D-altrose in its cyclic form, as depicted by a Haworth projection. The task is to identify the type of cyclic sugar formed. ### Structure Analysis: The diagram in the image shows the Haworth projection of D-altrose. It is a six-membered ring structure, typical of pyranoses. The ring includes five carbon atoms and one oxygen atom, making it a hexagon. ### Options for Answer: - **A) Glucose**: Not applicable as the question asks for the type of cyclic structure, not the specific sugar. - **B) Furanose**: Incorrect, since a furanose is a five-membered ring, contrasting with the six-membered structure shown. - **C) Pyranose**: Correct, reflecting the six-membered ring structure seen in the diagram. - **D) Hexanose**: Incorrect choice; hexanose refers to a six-carbon sugar, not specifically the cyclic structure type. ### Correct Answer: C) Pyranose This answer is highlighted in the image, indicating it as the correct choice. The answer reflects the structural feature of the sugar based on its six-membered ring formation.
**Question:**

Which of the following statements is true about the quaternary structure of a protein?

**Options:**

A) The quaternary structure of a protein is based on how polypeptide subunits interact with one another.

B) The quaternary structure of a protein is affected by hydrogen bonds.

C) The quaternary structure is the overall shape of a protein.

D) The quaternary structure is driven by α-helices and β-pleated sheets.

E) The quaternary structure is found in all proteins.

**Explanation:**

The quaternary structure of a protein refers to the way in which multiple polypeptide subunits are assembled and interact with each other. Unlike primary, secondary, and tertiary structures, which relate to a single polypeptide chain, the quaternary structure involves the organization and interactions between multiple chains or subunits, which can be stabilized by various forces such as hydrophobic interactions, ionic bonds, hydrogen bonds, and disulfide bridges.

**Diagram Description:**

There are no graphs or diagrams accompanying this text.
Transcribed Image Text:**Question:** Which of the following statements is true about the quaternary structure of a protein? **Options:** A) The quaternary structure of a protein is based on how polypeptide subunits interact with one another. B) The quaternary structure of a protein is affected by hydrogen bonds. C) The quaternary structure is the overall shape of a protein. D) The quaternary structure is driven by α-helices and β-pleated sheets. E) The quaternary structure is found in all proteins. **Explanation:** The quaternary structure of a protein refers to the way in which multiple polypeptide subunits are assembled and interact with each other. Unlike primary, secondary, and tertiary structures, which relate to a single polypeptide chain, the quaternary structure involves the organization and interactions between multiple chains or subunits, which can be stabilized by various forces such as hydrophobic interactions, ionic bonds, hydrogen bonds, and disulfide bridges. **Diagram Description:** There are no graphs or diagrams accompanying this text.
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