{"id":202799,"date":"2025-03-18T06:15:39","date_gmt":"2025-03-18T06:15:39","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=202799"},"modified":"2025-03-18T06:15:42","modified_gmt":"2025-03-18T06:15:42","slug":"the-primary-building-block-monomer-of-proteins-is","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/18\/the-primary-building-block-monomer-of-proteins-is\/","title":{"rendered":"The primary building block (monomer) of proteins is"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The primary building block (monomer) of proteins is:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">a)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A nucleotide<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">b)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">An amino acid<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">c)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A glucose molecule<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">d)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A fatty acid<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Correct Answer:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>b) An amino acid<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Proteins are essential macromolecules in all living organisms, playing critical roles in structure, function, and regulation of the body\u2019s tissues and organs. The fundamental building blocks of proteins are <strong>amino acids<\/strong>.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Structure of Amino Acids<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Amino acids are organic compounds composed of:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>A central carbon atom (alpha carbon)<\/strong><\/li>\n\n\n\n<li><strong>An amino group (-NH\u2082)<\/strong><\/li>\n\n\n\n<li><strong>A carboxyl group (-COOH)<\/strong><\/li>\n\n\n\n<li><strong>A hydrogen atom<\/strong><\/li>\n\n\n\n<li><strong>A side chain (R group) that varies among different amino acids<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>R group<\/strong> determines the unique properties of each amino acid. There are <strong>20 different amino acids<\/strong> that combine in various sequences to form proteins.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Protein Formation: Peptide Bonds<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Amino acids link together through <strong>peptide bonds<\/strong> in a process called <strong>dehydration synthesis<\/strong> or <strong>condensation reaction<\/strong>. This reaction removes a water molecule and forms a covalent bond between the carboxyl group of one amino acid and the amino group of another. Chains of amino acids form <strong>polypeptides<\/strong>, which fold into specific three-dimensional structures to become functional proteins.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Importance of Proteins<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Proteins perform various functions, including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Structural support<\/strong> (e.g., collagen in skin and bones)<\/li>\n\n\n\n<li><strong>Enzymatic activity<\/strong> (e.g., catalyzing biochemical reactions)<\/li>\n\n\n\n<li><strong>Transport and storage<\/strong> (e.g., hemoglobin transporting oxygen)<\/li>\n\n\n\n<li><strong>Immune response<\/strong> (e.g., antibodies defending against pathogens)<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Incorrect Options:<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>a) Nucleotide<\/strong>: The building blocks of DNA and RNA, not proteins.<\/li>\n\n\n\n<li><strong>c) Glucose molecule<\/strong>: A carbohydrate monomer, not related to protein synthesis.<\/li>\n\n\n\n<li><strong>d) Fatty acid<\/strong>: A component of lipids, not proteins.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Thus, the correct answer is <strong>b) An amino acid<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The primary building block (monomer) of proteins is: a) A nucleotide b) An amino acid c) A glucose molecule d) A fatty acid The correct answer and explanation is : Correct Answer: b) An amino acid Explanation: Proteins are essential macromolecules in all living organisms, playing critical roles in structure, function, and regulation of the 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