Concept explainers
Introduction :
Carbon atoms join to form carbon molecules. Similarly, most cells have small carbon compounds that act as the building blocks for large molecules. Smaller organic molecules join together to form macromolecules or
Answer to Problem 43A
Correct answer :
The correct answer is option (B) carbon and oxygen.
Explanation of Solution
Explanation/justification for the correct answer :
Option (A) peptide bonds. Proteins are the building blocks of life. They are made of small carbon compounds called amino acids. Amino acids are composed of carbon, nitrogen, oxygen, hydrogen and sometimes sulfur. All amino acids have the same general structure with a central carbon surrounded by four groups. The amino acids are joined together by several covalent bonds called peptide bonds to form proteins. A peptide bond is formed between the amino group (-NH2) of an amino acid and the carboxyl group (-COOH) of another. So, the correct answer is option (A).
Explanation for incorrect answer :
Option (B) hydrogen bonds. The force of attraction between the electronegative atom and hydrogen molecules is known as hydrogen bond. Water has a bent shape and the electrons are not shared equally between hydrogen and oxygen, therefore hydrogen bonds form among the molecules. The amino acids are joined together by several covalent bonds called peptide bonds to form proteins. So, this is an incorrect option.
Option (C) van der Waals forces. The attractive forces between the positive and negative regions of molecules that hold them together is known as van der Waals forces. The amino acids are joined together by several covalent bonds called peptide bonds to form proteins. So, this is an incorrect answer.
Option (D) ionic bonds.
Chapter 6 Solutions
Biology Illinois Edition (Glencoe Science)
Additional Science Textbook Solutions
Campbell Essential Biology (6th Edition) - standalone book
Essentials of Genetics (9th Edition) - Standalone book
Campbell Biology: Concepts & Connections (9th Edition)
Genetic Analysis: An Integrated Approach (2nd Edition)
Human Anatomy & Physiology (11th Edition)
Concepts of Genetics (11th Edition)
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