Multiple Choice
Which of the following macromolecules does the cell use for structure and support?
2. Chemical Components of Cells
Four Classes of Macromolecules
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Which of the following is false?
A
Polysaccharides are responsible for energy storage and cellular support
B
Nucleic acids are linked via Phosphodiester bonds
C
Amino acid sequence and structure provide proteins with unique physical attributes
D
Fatty acids are composed of branched hydrocarbon chains
Verified step by step guidance1
Identify the key components of each statement to determine their accuracy. For example, understand the role of polysaccharides, nucleic acids, proteins, and fatty acids in biological systems.
Review the structure and function of polysaccharides. They are indeed responsible for energy storage (e.g., glycogen, starch) and cellular support (e.g., cellulose in plant cell walls).
Examine the structure of nucleic acids. They are composed of nucleotides linked by phosphodiester bonds, forming the backbone of DNA and RNA strands.
Consider the role of amino acids in proteins. The sequence and structure of amino acids determine the protein's unique physical and chemical properties, influencing its function.
Analyze the structure of fatty acids. They typically consist of long, unbranched hydrocarbon chains with a carboxyl group at one end, not branched chains. This makes the statement about fatty acids false.
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