Biochemistry
Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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### Understanding Viral Characteristics: A Critical Review

#### Multiple-Choice Question on Viral Nature

**Question:**
Which ONE of the following answer choices is NOT a suitable explanation for the fact that viruses are non-living entities?

**Options:**

A) Virions are unable to reproduce by themselves.

B) Virions are not able to synthesize DNA by themselves.

C) Virions are not able to metabolize by themselves.

D) Virions are not able to assemble spontaneously.

---

This question is designed to enhance students' comprehension of why viruses are categorized as non-living entities. It probes the understanding of fundamental characteristics that distinguish living organisms from non-living entities, particularly focusing on viruses.
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Transcribed Image Text:### Understanding Viral Characteristics: A Critical Review #### Multiple-Choice Question on Viral Nature **Question:** Which ONE of the following answer choices is NOT a suitable explanation for the fact that viruses are non-living entities? **Options:** A) Virions are unable to reproduce by themselves. B) Virions are not able to synthesize DNA by themselves. C) Virions are not able to metabolize by themselves. D) Virions are not able to assemble spontaneously. --- This question is designed to enhance students' comprehension of why viruses are categorized as non-living entities. It probes the understanding of fundamental characteristics that distinguish living organisms from non-living entities, particularly focusing on viruses.
**The Effect of a Competitive Inhibitor on Enzymatic Activity**

**Question:**
The effect of a competitive inhibitor can be reversed by _______.

**Answer Choices:**
1. Changing the pH
2. Heating the reaction mixture
3. Increasing substrate concentration
4. Increasing inhibitor concentration
5. Massaging the enzyme

**Explanation:**
In the context of enzyme kinetics, a competitive inhibitor competes with the substrate for binding to the active site of the enzyme. This type of inhibitor is typically reversible and its effects can often be counteracted by increasing the concentration of the substrate. The higher substrate concentration can outcompete the inhibitor for the active site, thereby restoring the enzyme's activity. 

**Correct Answer:**
- Increasing substrate concentration

This answer effectively negates the impact of the inhibitor by providing more substrate molecules, which increases the probability that the active sites of the enzyme molecules are occupied by substrate rather than the inhibitor.
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Transcribed Image Text:**The Effect of a Competitive Inhibitor on Enzymatic Activity** **Question:** The effect of a competitive inhibitor can be reversed by _______. **Answer Choices:** 1. Changing the pH 2. Heating the reaction mixture 3. Increasing substrate concentration 4. Increasing inhibitor concentration 5. Massaging the enzyme **Explanation:** In the context of enzyme kinetics, a competitive inhibitor competes with the substrate for binding to the active site of the enzyme. This type of inhibitor is typically reversible and its effects can often be counteracted by increasing the concentration of the substrate. The higher substrate concentration can outcompete the inhibitor for the active site, thereby restoring the enzyme's activity. **Correct Answer:** - Increasing substrate concentration This answer effectively negates the impact of the inhibitor by providing more substrate molecules, which increases the probability that the active sites of the enzyme molecules are occupied by substrate rather than the inhibitor.
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