learnbiology

Class 9 – Chapter 8: Bioenergetics | MCQs (1–20) Section 1: Basic Concepts of Bioenergetics Bioenergetics is the study of: a) Life cycles b) Body organs c) Energy flow in living organisms d) Cell division ✅ Answer: c) Energy flow in living organisms The ultimate source of energy for all living things is a) Water b) Sun c) Oxygen d) Soil ✅ Answer: b) Sun Which process converts light energy into chemical energy? a) Respiration b) Photosynthesis c) Digestion d) Excretion ✅ Answer: b) Photosynthesis The main product of photosynthesis is: a) Oxygen b) Carbon dioxide c) Glucose d) Water ✅ Answer: c) Glucose The process of photosynthesis takes place in: a) Mitochondria b) Cytoplasm c) Chloroplast d) Nucleus ✅ Answer: c) Chloroplast Photosynthesis occurs mainly in: a) Stems b) Roots c) Leaves d) Flowers ✅ Answer: c) Leaves The green pigment in plants is a) Chlorophyll b) Xylem c) Hemoglobin d) Phloem ✅ Answer: a) Chlorophyll Chlorop...