Animal Biochemistry MCQS January 8, 2026March 26, 2024 by u930973931_answers 15 min Score: 0 Attempted: 0/15 Subscribe 1. . Which of the following is NOT a major class of biomolecules in animals?Explanation: Metals are not considered a major class of biomolecules; the main classes are carbohydrates, lipids, proteins, and nucleic acids. (A) Carbohydrates (B) Lipids (C) Nucleic acids (D) Metals 2. . What is the primary function of carbohydrates in animals?Explanation: Carbohydrates provide a quick source of energy and form structural components like cellulose in plants and glycogen in animals. (A) Energy storage and structural support (B) Signaling molecules (C) Enzyme regulation (D) Transport of oxygen 3. . Which molecule serves as the primary energy storage form in animals?Explanation: Glycogen is the main storage form of glucose in animals, primarily found in the liver and muscles. (A) Glucose (B) ATP (adenosine triphosphate) (C) Glycogen (D) Lipids 4. . What is the role of enzymes in biochemical reactions?Explanation: Enzymes act as biological catalysts to speed up chemical reactions without being consumed. (A) Energy storage (B) Structural support (C) Catalyzing chemical reactions (D) Transport of molecules 5. . Which of the following is NOT a function of proteins in animals?Explanation: Proteins serve as enzymes, hormones, and structural components, but DNA stores genetic information. (A) Enzymatic catalysis (B) Hormone signaling (C) Genetic information storage (D) Structural support 6. . What is the function of lipids in cell membranes?Explanation: Lipids, especially phospholipids, form the structural bilayer of cell membranes. (A) Energy storage (B) Signaling molecules (C) Structural components (D) Enzyme regulation 7. . Which molecule is commonly known as the “universal energy currency” of cells?Explanation: ATP provides energy for cellular processes and reactions throughout the cell. (A) Glucose (B) ATP (adenosine triphosphate) (C) Glycogen (D) RNA (ribonucleic acid) 8. . What is the primary function of nucleic acids in animals?Explanation: DNA and RNA store and transfer genetic information in cells. (A) Energy storage (B) Structural support (C) Information storage and transmission (D) Enzyme regulation 9. . Which of the following is a characteristic feature of DNA (deoxyribonucleic acid)?Explanation: DNA consists of two complementary strands forming a helical structure. (A) Single-stranded structure (B) Contains ribose sugar (C) Forms a double helix (D) Carries out protein synthesis 10. . What is the function of RNA (ribonucleic acid) in protein synthesis?Explanation: tRNA carries specific amino acids to the ribosome according to the mRNA sequence. (A) Carries genetic information (B) Serves as an enzyme (C) Transfers amino acids to ribosomes (D) Stores energy 11. . Which of the following is NOT a type of RNA involved in protein synthesis?Explanation: drRNA does not exist; mRNA, tRNA, and rRNA are the main RNAs in protein synthesis. (A) Messenger RNA (mRNA) (B) Transfer RNA (tRNA) (C) Ribosomal RNA (rRNA) (D) Deoxyribonucleic RNA (drRNA) 12. . What is the function of ATP (adenosine triphosphate) in cellular processes?Explanation: ATP stores and supplies energy for cellular activities. (A) Energy storage (B) Structural support (C) Enzyme regulation (D) Transport of molecules 13. . Which cellular organelle is responsible for ATP production through oxidative phosphorylation?Explanation: Mitochondria generate ATP through the electron transport chain and oxidative phosphorylation. (A) Nucleus (B) Endoplasmic reticulum (C) Golgi apparatus (D) Mitochondrion 14. . What is the primary role of mitochondria in animal cells?Explanation: Mitochondria are the “powerhouses” of the cell, producing ATP from nutrients. (A) Protein synthesis (B) Energy production (ATP synthesis) (C) Lipid storage (D) Genetic information storage 15. . What is the function of ribosomes in animal cells?Explanation: Ribosomes synthesize proteins by translating mRNA. (A) Energy production (B) Protein synthesis (C) Lipid synthesis (D) DNA replication