Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Question
![**Question:** What do urea, enzymes, and ammonia all have in common?
**Options:**
- they are all proteins
- phosphorous
- they are all essential nutrients
- nitrogen
**Explanation:**
The question asks about a common feature of urea, enzymes, and ammonia. The first option, "they are all proteins," is selected, but this is incorrect. The correct commonality among urea, enzymes, and ammonia is their nitrogen content.
- **Urea**: A compound with two amine groups, commonly found in urine and used in fertilizers, known for its high nitrogen content.
- **Enzymes**: Proteins that act as biological catalysts, composed of amino acids which contain nitrogen.
- **Ammonia**: A compound of nitrogen and hydrogen, widely used as a fertilizer and industrial chemical.
All these substances involve nitrogen, a fundamental element for life, playing a key role in various biological and chemical processes.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F762ae8e9-5e59-40c6-9da5-fc59f1b0cdc5%2F9f07ee0c-259e-40a5-9c6e-e638448d2b9e%2Fihf23bw_processed.png&w=3840&q=75)
Transcribed Image Text:**Question:** What do urea, enzymes, and ammonia all have in common?
**Options:**
- they are all proteins
- phosphorous
- they are all essential nutrients
- nitrogen
**Explanation:**
The question asks about a common feature of urea, enzymes, and ammonia. The first option, "they are all proteins," is selected, but this is incorrect. The correct commonality among urea, enzymes, and ammonia is their nitrogen content.
- **Urea**: A compound with two amine groups, commonly found in urine and used in fertilizers, known for its high nitrogen content.
- **Enzymes**: Proteins that act as biological catalysts, composed of amino acids which contain nitrogen.
- **Ammonia**: A compound of nitrogen and hydrogen, widely used as a fertilizer and industrial chemical.
All these substances involve nitrogen, a fundamental element for life, playing a key role in various biological and chemical processes.
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