Question

1. vocabulary discrimination

each set contains one term that does not belong.
identify the term and justify your choice.

a) amino acid – polypeptide – enzyme – nucleotide

b) monosaccharide – fatty acid – glucose – starch

c) dna – rna – lipid – nucleotide

Explanation:

Part a)

• Amino acids are the building blocks of polypeptides (proteins), and enzymes are often proteins (polypeptides) or RNA.
• Nucleotides are the building blocks of nucleic acids (DNA, RNA), while amino acid, polypeptide, and enzyme are related to proteins. So nucleotide does not belong as it is part of nucleic acid structure, not protein - related.

• Monosaccharide (e.g., glucose) and starch are carbohydrates (monosaccharides are simple sugars, starch is a polysaccharide).
• Fatty acid is part of lipids (fats, oils), so fatty acid does not belong as it is a lipid component, not a carbohydrate.

• DNA, RNA, and nucleotide are related to nucleic acids (nucleotides are building blocks of DNA and RNA).
• Lipid is a different macromolecule (fats, oils, etc.), so lipid does not belong as it is not part of the nucleic acid group.

Answer:

Term: nucleotide. Justification: Amino acid, polypeptide, and enzyme are related to proteins (amino acids form polypeptides, enzymes are often proteins), while nucleotide is part of nucleic acid structure.

Part b)