Question

unit 1 cumulative test (characteristics of life, biomolecules, cell structure ar
32 of 42

which statement is true?

∘ polysaccharides are made of simple sugars.
∘ glycerol is made of fatty acids.
∘ rna molecules are made of amino acids.
∘ amino acids are made of proteins.

Explanation:

• Analyze each option:
• Option 1: Polysaccharides are complex carbohydrates made by linking multiple simple sugar (monosaccharide) units through glycosidic bonds. This is correct.
• Option 2: Triglycerides (fats) are made of glycerol and fatty acids, not the other way around. So this is incorrect.
• Option 3: RNA (ribonucleic acid) is made of nucleotides (composed of a sugar, phosphate, and nitrogenous base), while amino acids are the building blocks of proteins. So this is incorrect.
• Option 4: Proteins are made of amino acids (amino acids are linked together to form proteins), not the other way around. So this is incorrect.

Answer:

A. Polysaccharides are made of simple sugars.