OCR GCSE Biology 2026 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 1090

What are large, complex carbohydrates made from?

Fatty acids

Monomers joined in long chains

Large, complex carbohydrates, often referred to as polysaccharides, are primarily made from simple sugars known as monosaccharides. These monosaccharides link together through glycosidic bonds, forming long chains. As more monosaccharides join, they create larger structures, which can serve various functions in living organisms, such as energy storage (as in starch and glycogen) or providing structural support (as in cellulose in plant cell walls).

In contrast, fatty acids are building blocks of lipids; amino acids are the building blocks of proteins; and nucleotides compose nucleic acids like DNA and RNA. None of these options pertain to the composition of carbohydrates, which specifically involves sugar monomers linked together in a chain-like fashion. This is why the correct response pertains to monomers joined in long chains, highlighting the relationship between simple sugars and complex carbohydrate structures.

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Amino acids linked together

Nucleotide sequences

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