To evaluate the statements about carbohydrates, let's analyze each one:
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Are polysaccharides - This is partially true, as carbohydrates can be monosaccharides (simple sugars), disaccharides (two sugars), or polysaccharides (many sugars). So while some carbohydrates are polysaccharides, not all are.
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Store energy - True. Carbohydrates, particularly polysaccharides like starch and glycogen, serve as energy storage molecules in organisms.
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Are made from carbon, hydrogens, and oxygens - True. Carbohydrates are organic compounds made primarily of carbon, hydrogen, and oxygen, typically in a ratio of approximately 1:2:1.
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Are synthesized through peptide bonding - False. Carbohydrates are synthesized through glycosidic bonds, not peptide bonds. Peptide bonds are used to link amino acids in proteins.
Based on the evaluations:
- True statements: 2, 3
- Partially true: 1 (but not applicable for all carbohydrates)
- False statement: 4
So, the correct responses are 2 and 3.