MCQs Biology-29 Posted on December 10, 2025December 10, 2025Author agropublishers 0 Table of Contents Toggle MCQs Biology-29Multiple Choice QuestionsMCQs Biology-29 MCQs Biology-29 Multiple Choice Questions 1. The lower esophageal sphincter is a ring of muscle at the junction of the esophagus and the stomach, which prevents ————— Backflow of gastric contents Passage of food into the trachea Absorption of nutrients Entry of air into the esophagus 2. Which enzyme works optimally at an alkaline pH (around 8)? Pepsin Amylase Invertase Trypsin 3. Glycogen is a ———— Monosaccharide Lipid Disaccharide Polysaccharide 4. The primary mechanism by which cells synthesize ATP during oxidative phosphorylation and photophosphorylation is _____________? Chemosynthesis Photosynthesis Chemiosmosis Phosphorylation 5. Which of the following enzymes is present in human saliva? Invertase Lipase Trypsin Ptyalin 6. In most fungi and higher plants, somatic cells lack which organelle? Centriole Mitochondrion Golgi body Ribosome 7. Nitrogen is an essential component of which of the following biomolecules? Lipids Carbonates Proteins Carbohydrates 8. Chinese population has a higher fertility rate than the Indian people True False 9. _____________ is the specific enzyme that catalyzes the hydrolysis (breakdown) of the disaccharide sucrose into its constituent monosaccharides: glucose and fructose Invertase Trypsin Lipase Urease 10. Which of the following treatments is commonly administered to patients diagnosed with cancer? Gene therapy Antibiotic therapy All of these Radiotherapy Loading … Question 1 of 10 MCQs Biology-29
