Question

Which of the following is incorrectly matched ?

• A. Amino acids - Proteins
• B. Fatty acids - Deoxynucleotides
• C. Glucose - Polysaccharides
• D. Nucleoside triphosphate - Nucleic acids

Hint:

Memorize the four main classes of biological macromolecules and their monomers:

\textbf{Carbohydrates} (Polysaccharides) \(\rightarrow\) \textbf{Monosaccharides} (e.g., glucose)
\textbf{Proteins} \(\rightarrow\) \textbf{Amino acids}
\textbf{Nucleic Acids} (DNA/RNA) \(\rightarrow\) \textbf{Nucleotides}
\textbf{Lipids} \(\rightarrow\) \textbf{Fatty acids} \& \textbf{Glycerol}

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
The question asks to identify the pair where the monomer (building block) is incorrectly matched with its corresponding polymer or macromolecule.
Step 2: Detailed Explanation:
Let's analyze each pair:

(A) Amino acids - Proteins: This is a correct match. Proteins are polymers made up of amino acid monomers linked by peptide bonds.
(B) Fatty acids - Deoxynucleotides: This is an incorrect match.

Fatty acids are the building blocks of lipids (fats and oils), along with glycerol.
Deoxynucleotides are the monomers of DNA (a nucleic acid). A deoxynucleotide itself is composed of three parts: a deoxyribose sugar, a phosphate group, and a nitrogenous base.
There is no direct monomer-polymer relationship between fatty acids and deoxynucleotides.
(C) Glucose - Polysaccharides: This is a correct match. Polysaccharides (like starch, glycogen, and cellulose) are polymers made up of monosaccharide monomers, with glucose being the most common one.
(D) Nucleoside triphosphate - Nucleic acids: This is a correct match. Nucleic acids (DNA and RNA) are polymers made of nucleotide monomers. Nucleoside triphosphates (like ATP, GTP, CTP, TTP) are the activated precursors used during the synthesis of nucleic acid polymers. Two phosphate groups are cleaved off during polymerization, and the remaining nucleotide is incorporated into the growing chain.
Step 3: Final Answer:
The pair "Fatty acids - Deoxynucleotides" is incorrectly matched as they belong to two different classes of macromolecules.