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The product formed that indicates a positive test for Benedict's O furfural nucleoside O phosphate copper oxide Other:

The product formed that indicates a positive test for Benedict's O furfural nucleoside O phosphate copper oxide Other:

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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**Educational Content Transcript:** ### Product Formed in a Positive Benedict’s Test **Question:** The product formed that indicates a positive test for Benedict's: - ○ furfural - ○ nucleoside - ○ phosphate - ○ copper oxide - ○ Other ### Amines in Chemical Reactions **Question:** In this reaction, the amine is a: - **Chemical Reaction Diagram:** - Structure on the left: An amine with the formula \( \text{H}_3\text{C}-\text{N}:\text{H}-\text{C}\text{H}_3 \) - Plus sign indicates reaction with \( \text{H}^+ \) - Structure on the right: The resulting ammonium ion \( \text{H}_3\text{C}-\text{N}^+\text{H}_3 \) - ○ Arrhenius acid - ○ Bronsted base - ○ Atkins base - ○ nonpolar molecule **Explanation of Reaction Diagram:** The diagram shows an amine reacting with a proton (H⁺) to form an ammonium ion. The lone pair on the nitrogen atom of the amine accepts a proton, making it a Bronsted base in this reaction.
Transcribed Image Text:**Educational Content Transcript:** ### Product Formed in a Positive Benedict’s Test **Question:** The product formed that indicates a positive test for Benedict's: - ○ furfural - ○ nucleoside - ○ phosphate - ○ copper oxide - ○ Other ### Amines in Chemical Reactions **Question:** In this reaction, the amine is a: - **Chemical Reaction Diagram:** - Structure on the left: An amine with the formula \( \text{H}_3\text{C}-\text{N}:\text{H}-\text{C}\text{H}_3 \) - Plus sign indicates reaction with \( \text{H}^+ \) - Structure on the right: The resulting ammonium ion \( \text{H}_3\text{C}-\text{N}^+\text{H}_3 \) - ○ Arrhenius acid - ○ Bronsted base - ○ Atkins base - ○ nonpolar molecule **Explanation of Reaction Diagram:** The diagram shows an amine reacting with a proton (H⁺) to form an ammonium ion. The lone pair on the nitrogen atom of the amine accepts a proton, making it a Bronsted base in this reaction.
**Chemical Reaction and pH Concept Quiz** 1. **Reaction Analysis** In this reaction, \( \text{H}_3\text{O}^+ \) is a stronger acid than ethanoic acid (acetic acid). \[ \text{H}_3\text{C} - \overset{O}{\underset{|}{C}} - \text{O} - \text{H} + \text{H}_2\text{O} \rightleftharpoons \text{H}_3\text{C} - \overset{O}{\underset{|}{C}} - \text{O}^- + \text{H}_3\text{O}^+ \] - True - False 2. **pH Level Comparison** The pH level of 0.1 M HCl is the same as the pH level of 0.1 M acetic acid. - True - False (Selected) 3. **Buffer Limitations** The original laboratory buffers for use in biochemical studies had severe limitations, one of which is: - They are made up of long-chain aldehydes that do not react when base is added. - They often permeate cells, which changes the biochemistry of the cells. - They do not change the pH no matter how much acid or base is being added. - They maintain their pH even if the solution is diluted or the temperature is changed. - Other: _______
Transcribed Image Text:**Chemical Reaction and pH Concept Quiz** 1. **Reaction Analysis** In this reaction, \( \text{H}_3\text{O}^+ \) is a stronger acid than ethanoic acid (acetic acid). \[ \text{H}_3\text{C} - \overset{O}{\underset{|}{C}} - \text{O} - \text{H} + \text{H}_2\text{O} \rightleftharpoons \text{H}_3\text{C} - \overset{O}{\underset{|}{C}} - \text{O}^- + \text{H}_3\text{O}^+ \] - True - False 2. **pH Level Comparison** The pH level of 0.1 M HCl is the same as the pH level of 0.1 M acetic acid. - True - False (Selected) 3. **Buffer Limitations** The original laboratory buffers for use in biochemical studies had severe limitations, one of which is: - They are made up of long-chain aldehydes that do not react when base is added. - They often permeate cells, which changes the biochemistry of the cells. - They do not change the pH no matter how much acid or base is being added. - They maintain their pH even if the solution is diluted or the temperature is changed. - Other: _______
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